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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /nsprpub/pr/include/prio.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'nsprpub/pr/include/prio.h')
-rw-r--r--nsprpub/pr/include/prio.h2022
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diff --git a/nsprpub/pr/include/prio.h b/nsprpub/pr/include/prio.h
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@@ -0,0 +1,2022 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * File: prio.h
+ *
+ * Description: PR i/o related stuff, such as file system access, file
+ * i/o, socket i/o, etc.
+ */
+
+#ifndef prio_h___
+#define prio_h___
+
+#include "prlong.h"
+#include "prtime.h"
+#include "prinrval.h"
+#include "prinet.h"
+
+PR_BEGIN_EXTERN_C
+
+/* Typedefs */
+typedef struct PRDir PRDir;
+typedef struct PRDirEntry PRDirEntry;
+#ifdef MOZ_UNICODE
+typedef struct PRDirUTF16 PRDirUTF16;
+typedef struct PRDirEntryUTF16 PRDirEntryUTF16;
+#endif /* MOZ_UNICODE */
+typedef struct PRFileDesc PRFileDesc;
+typedef struct PRFileInfo PRFileInfo;
+typedef struct PRFileInfo64 PRFileInfo64;
+typedef union PRNetAddr PRNetAddr;
+typedef struct PRIOMethods PRIOMethods;
+typedef struct PRPollDesc PRPollDesc;
+typedef struct PRFilePrivate PRFilePrivate;
+typedef struct PRSendFileData PRSendFileData;
+
+/*
+***************************************************************************
+** The file descriptor.
+** This is the primary structure to represent any active open socket,
+** whether it be a normal file or a network connection. Such objects
+** are stackable (or layerable). Each layer may have its own set of
+** method pointers and context private to that layer. All each layer
+** knows about its neighbors is how to get to their method table.
+***************************************************************************
+*/
+
+typedef PRIntn PRDescIdentity; /* see: Layering file descriptors */
+
+struct PRFileDesc {
+ const PRIOMethods *methods; /* the I/O methods table */
+ PRFilePrivate *secret; /* layer dependent data */
+ PRFileDesc *lower, *higher; /* pointers to adjacent layers */
+ void (PR_CALLBACK *dtor)(PRFileDesc *fd);
+ /* A destructor function for layer */
+ PRDescIdentity identity; /* Identity of this particular layer */
+};
+
+/*
+***************************************************************************
+** PRTransmitFileFlags
+**
+** Flags for PR_TransmitFile. Pass PR_TRANSMITFILE_CLOSE_SOCKET to
+** PR_TransmitFile if the connection should be closed after the file
+** is transmitted.
+***************************************************************************
+*/
+typedef enum PRTransmitFileFlags {
+ PR_TRANSMITFILE_KEEP_OPEN = 0, /* socket is left open after file
+ * is transmitted. */
+ PR_TRANSMITFILE_CLOSE_SOCKET = 1 /* socket is closed after file
+ * is transmitted. */
+} PRTransmitFileFlags;
+
+/*
+**************************************************************************
+** Macros for PRNetAddr
+**
+** Address families: PR_AF_INET, PR_AF_INET6, PR_AF_LOCAL
+** IP addresses: PR_INADDR_ANY, PR_INADDR_LOOPBACK, PR_INADDR_BROADCAST
+**************************************************************************
+*/
+
+#ifdef WIN32
+
+#define PR_AF_INET 2
+#define PR_AF_LOCAL 1
+#define PR_INADDR_ANY (unsigned long)0x00000000
+#define PR_INADDR_LOOPBACK 0x7f000001
+#define PR_INADDR_BROADCAST (unsigned long)0xffffffff
+
+#else /* WIN32 */
+
+#define PR_AF_INET AF_INET
+#define PR_AF_LOCAL AF_UNIX
+#define PR_INADDR_ANY INADDR_ANY
+#define PR_INADDR_LOOPBACK INADDR_LOOPBACK
+#define PR_INADDR_BROADCAST INADDR_BROADCAST
+
+#endif /* WIN32 */
+
+/*
+** Define PR_AF_INET6 in prcpucfg.h with the same
+** value as AF_INET6 on platforms with IPv6 support.
+** Otherwise define it here.
+*/
+#ifndef PR_AF_INET6
+#define PR_AF_INET6 100
+#endif
+
+#define PR_AF_INET_SDP 101
+#define PR_AF_INET6_SDP 102
+
+#ifndef PR_AF_UNSPEC
+#define PR_AF_UNSPEC 0
+#endif
+
+/*
+**************************************************************************
+** A network address
+**
+** Only Internet Protocol (IPv4 and IPv6) addresses are supported.
+** The address family must always represent IPv4 (AF_INET, probably == 2)
+** or IPv6 (AF_INET6).
+**************************************************************************
+*************************************************************************/
+
+struct PRIPv6Addr {
+ union {
+ PRUint8 _S6_u8[16];
+ PRUint16 _S6_u16[8];
+ PRUint32 _S6_u32[4];
+ PRUint64 _S6_u64[2];
+ } _S6_un;
+};
+#define pr_s6_addr _S6_un._S6_u8
+#define pr_s6_addr16 _S6_un._S6_u16
+#define pr_s6_addr32 _S6_un._S6_u32
+#define pr_s6_addr64 _S6_un._S6_u64
+
+typedef struct PRIPv6Addr PRIPv6Addr;
+
+union PRNetAddr {
+ struct {
+ PRUint16 family; /* address family (0x00ff maskable) */
+#ifdef XP_BEOS
+ char data[10]; /* Be has a smaller structure */
+#else
+ char data[14]; /* raw address data */
+#endif
+ } raw;
+ struct {
+ PRUint16 family; /* address family (AF_INET) */
+ PRUint16 port; /* port number */
+ PRUint32 ip; /* The actual 32 bits of address */
+#ifdef XP_BEOS
+ char pad[4]; /* Be has a smaller structure */
+#else
+ char pad[8];
+#endif
+ } inet;
+ struct {
+ PRUint16 family; /* address family (AF_INET6) */
+ PRUint16 port; /* port number */
+ PRUint32 flowinfo; /* routing information */
+ PRIPv6Addr ip; /* the actual 128 bits of address */
+ PRUint32 scope_id; /* set of interfaces for a scope */
+ } ipv6;
+#if defined(XP_UNIX) || defined(XP_OS2) || defined(XP_WIN)
+ struct { /* Unix domain socket address */
+ PRUint16 family; /* address family (AF_UNIX) */
+#ifdef XP_OS2
+ char path[108]; /* null-terminated pathname */
+ /* bind fails if size is not 108. */
+#else
+ char path[104]; /* null-terminated pathname */
+#endif
+ } local;
+#endif
+};
+
+/*
+***************************************************************************
+** PRSockOption
+**
+** The file descriptors can have predefined options set after they file
+** descriptor is created to change their behavior. Only the options in
+** the following enumeration are supported.
+***************************************************************************
+*/
+typedef enum PRSockOption
+{
+ PR_SockOpt_Nonblocking, /* nonblocking io */
+ PR_SockOpt_Linger, /* linger on close if data present */
+ PR_SockOpt_Reuseaddr, /* allow local address reuse */
+ PR_SockOpt_Keepalive, /* keep connections alive */
+ PR_SockOpt_RecvBufferSize, /* receive buffer size */
+ PR_SockOpt_SendBufferSize, /* send buffer size */
+
+ PR_SockOpt_IpTimeToLive, /* time to live */
+ PR_SockOpt_IpTypeOfService, /* type of service and precedence */
+
+ PR_SockOpt_AddMember, /* add an IP group membership */
+ PR_SockOpt_DropMember, /* drop an IP group membership */
+ PR_SockOpt_McastInterface, /* multicast interface address */
+ PR_SockOpt_McastTimeToLive, /* multicast timetolive */
+ PR_SockOpt_McastLoopback, /* multicast loopback */
+
+ PR_SockOpt_NoDelay, /* don't delay send to coalesce packets */
+ PR_SockOpt_MaxSegment, /* maximum segment size */
+ PR_SockOpt_Broadcast, /* enable broadcast */
+ PR_SockOpt_Reuseport, /* allow local address & port reuse on
+ * platforms that support it */
+ PR_SockOpt_Last
+} PRSockOption;
+
+typedef struct PRLinger {
+ PRBool polarity; /* Polarity of the option's setting */
+ PRIntervalTime linger; /* Time to linger before closing */
+} PRLinger;
+
+typedef struct PRMcastRequest {
+ PRNetAddr mcaddr; /* IP multicast address of group */
+ PRNetAddr ifaddr; /* local IP address of interface */
+} PRMcastRequest;
+
+typedef struct PRSocketOptionData
+{
+ PRSockOption option;
+ union
+ {
+ PRUintn ip_ttl; /* IP time to live */
+ PRUintn mcast_ttl; /* IP multicast time to live */
+ PRUintn tos; /* IP type of service and precedence */
+ PRBool non_blocking; /* Non-blocking (network) I/O */
+ PRBool reuse_addr; /* Allow local address reuse */
+ PRBool reuse_port; /* Allow local address & port reuse on
+ * platforms that support it */
+ PRBool keep_alive; /* Keep connections alive */
+ PRBool mcast_loopback; /* IP multicast loopback */
+ PRBool no_delay; /* Don't delay send to coalesce packets */
+ PRBool broadcast; /* Enable broadcast */
+ PRSize max_segment; /* Maximum segment size */
+ PRSize recv_buffer_size; /* Receive buffer size */
+ PRSize send_buffer_size; /* Send buffer size */
+ PRLinger linger; /* Time to linger on close if data present */
+ PRMcastRequest add_member; /* add an IP group membership */
+ PRMcastRequest drop_member; /* Drop an IP group membership */
+ PRNetAddr mcast_if; /* multicast interface address */
+ } value;
+} PRSocketOptionData;
+
+/*
+***************************************************************************
+** PRIOVec
+**
+** The I/O vector is used by the write vector method to describe the areas
+** that are affected by the ouput operation.
+***************************************************************************
+*/
+typedef struct PRIOVec {
+ char *iov_base;
+ int iov_len;
+} PRIOVec;
+
+/*
+***************************************************************************
+** Discover what type of socket is being described by the file descriptor.
+***************************************************************************
+*/
+typedef enum PRDescType
+{
+ PR_DESC_FILE = 1,
+ PR_DESC_SOCKET_TCP = 2,
+ PR_DESC_SOCKET_UDP = 3,
+ PR_DESC_LAYERED = 4,
+ PR_DESC_PIPE = 5
+} PRDescType;
+
+typedef enum PRSeekWhence {
+ PR_SEEK_SET = 0,
+ PR_SEEK_CUR = 1,
+ PR_SEEK_END = 2
+} PRSeekWhence;
+
+NSPR_API(PRDescType) PR_GetDescType(PRFileDesc *file);
+
+/*
+***************************************************************************
+** PRIOMethods
+**
+** The I/O methods table provides procedural access to the functions of
+** the file descriptor. It is the responsibility of a layer implementor
+** to provide suitable functions at every entry point. If a layer provides
+** no functionality, it should call the next lower(higher) function of the
+** same name (e.g., return fd->lower->method->close(fd->lower));
+**
+** Not all functions are implemented for all types of files. In cases where
+** that is true, the function will return a error indication with an error
+** code of PR_INVALID_METHOD_ERROR.
+***************************************************************************
+*/
+
+typedef PRStatus (PR_CALLBACK *PRCloseFN)(PRFileDesc *fd);
+typedef PRInt32 (PR_CALLBACK *PRReadFN)(PRFileDesc *fd, void *buf, PRInt32 amount);
+typedef PRInt32 (PR_CALLBACK *PRWriteFN)(PRFileDesc *fd, const void *buf, PRInt32 amount);
+typedef PRInt32 (PR_CALLBACK *PRAvailableFN)(PRFileDesc *fd);
+typedef PRInt64 (PR_CALLBACK *PRAvailable64FN)(PRFileDesc *fd);
+typedef PRStatus (PR_CALLBACK *PRFsyncFN)(PRFileDesc *fd);
+typedef PROffset32 (PR_CALLBACK *PRSeekFN)(PRFileDesc *fd, PROffset32 offset, PRSeekWhence how);
+typedef PROffset64 (PR_CALLBACK *PRSeek64FN)(PRFileDesc *fd, PROffset64 offset, PRSeekWhence how);
+typedef PRStatus (PR_CALLBACK *PRFileInfoFN)(PRFileDesc *fd, PRFileInfo *info);
+typedef PRStatus (PR_CALLBACK *PRFileInfo64FN)(PRFileDesc *fd, PRFileInfo64 *info);
+typedef PRInt32 (PR_CALLBACK *PRWritevFN)(
+ PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size,
+ PRIntervalTime timeout);
+typedef PRStatus (PR_CALLBACK *PRConnectFN)(
+ PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout);
+typedef PRFileDesc* (PR_CALLBACK *PRAcceptFN) (
+ PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout);
+typedef PRStatus (PR_CALLBACK *PRBindFN)(PRFileDesc *fd, const PRNetAddr *addr);
+typedef PRStatus (PR_CALLBACK *PRListenFN)(PRFileDesc *fd, PRIntn backlog);
+typedef PRStatus (PR_CALLBACK *PRShutdownFN)(PRFileDesc *fd, PRIntn how);
+typedef PRInt32 (PR_CALLBACK *PRRecvFN)(
+ PRFileDesc *fd, void *buf, PRInt32 amount,
+ PRIntn flags, PRIntervalTime timeout);
+typedef PRInt32 (PR_CALLBACK *PRSendFN) (
+ PRFileDesc *fd, const void *buf, PRInt32 amount,
+ PRIntn flags, PRIntervalTime timeout);
+typedef PRInt32 (PR_CALLBACK *PRRecvfromFN)(
+ PRFileDesc *fd, void *buf, PRInt32 amount,
+ PRIntn flags, PRNetAddr *addr, PRIntervalTime timeout);
+typedef PRInt32 (PR_CALLBACK *PRSendtoFN)(
+ PRFileDesc *fd, const void *buf, PRInt32 amount,
+ PRIntn flags, const PRNetAddr *addr, PRIntervalTime timeout);
+typedef PRInt16 (PR_CALLBACK *PRPollFN)(
+ PRFileDesc *fd, PRInt16 in_flags, PRInt16 *out_flags);
+typedef PRInt32 (PR_CALLBACK *PRAcceptreadFN)(
+ PRFileDesc *sd, PRFileDesc **nd, PRNetAddr **raddr,
+ void *buf, PRInt32 amount, PRIntervalTime t);
+typedef PRInt32 (PR_CALLBACK *PRTransmitfileFN)(
+ PRFileDesc *sd, PRFileDesc *fd, const void *headers,
+ PRInt32 hlen, PRTransmitFileFlags flags, PRIntervalTime t);
+typedef PRStatus (PR_CALLBACK *PRGetsocknameFN)(PRFileDesc *fd, PRNetAddr *addr);
+typedef PRStatus (PR_CALLBACK *PRGetpeernameFN)(PRFileDesc *fd, PRNetAddr *addr);
+typedef PRStatus (PR_CALLBACK *PRGetsocketoptionFN)(
+ PRFileDesc *fd, PRSocketOptionData *data);
+typedef PRStatus (PR_CALLBACK *PRSetsocketoptionFN)(
+ PRFileDesc *fd, const PRSocketOptionData *data);
+typedef PRInt32 (PR_CALLBACK *PRSendfileFN)(
+ PRFileDesc *networkSocket, PRSendFileData *sendData,
+ PRTransmitFileFlags flags, PRIntervalTime timeout);
+typedef PRStatus (PR_CALLBACK *PRConnectcontinueFN)(
+ PRFileDesc *fd, PRInt16 out_flags);
+typedef PRIntn (PR_CALLBACK *PRReservedFN)(PRFileDesc *fd);
+
+struct PRIOMethods {
+ PRDescType file_type; /* Type of file represented (tos) */
+ PRCloseFN close; /* close file and destroy descriptor */
+ PRReadFN read; /* read up to specified bytes into buffer */
+ PRWriteFN write; /* write specified bytes from buffer */
+ PRAvailableFN available; /* determine number of bytes available */
+ PRAvailable64FN available64; /* ditto, 64 bit */
+ PRFsyncFN fsync; /* flush all buffers to permanent store */
+ PRSeekFN seek; /* position the file to the desired place */
+ PRSeek64FN seek64; /* ditto, 64 bit */
+ PRFileInfoFN fileInfo; /* Get information about an open file */
+ PRFileInfo64FN fileInfo64; /* ditto, 64 bit */
+ PRWritevFN writev; /* Write segments as described by iovector */
+ PRConnectFN connect; /* Connect to the specified (net) address */
+ PRAcceptFN accept; /* Accept a connection for a (net) peer */
+ PRBindFN bind; /* Associate a (net) address with the fd */
+ PRListenFN listen; /* Prepare to listen for (net) connections */
+ PRShutdownFN shutdown; /* Shutdown a (net) connection */
+ PRRecvFN recv; /* Solicit up the the specified bytes */
+ PRSendFN send; /* Send all the bytes specified */
+ PRRecvfromFN recvfrom; /* Solicit (net) bytes and report source */
+ PRSendtoFN sendto; /* Send bytes to (net) address specified */
+ PRPollFN poll; /* Test the fd to see if it is ready */
+ PRAcceptreadFN acceptread; /* Accept and read on a new (net) fd */
+ PRTransmitfileFN transmitfile; /* Transmit at entire file */
+ PRGetsocknameFN getsockname; /* Get (net) address associated with fd */
+ PRGetpeernameFN getpeername; /* Get peer's (net) address */
+ PRReservedFN reserved_fn_6; /* reserved for future use */
+ PRReservedFN reserved_fn_5; /* reserved for future use */
+ PRGetsocketoptionFN getsocketoption;
+ /* Get current setting of specified option */
+ PRSetsocketoptionFN setsocketoption;
+ /* Set value of specified option */
+ PRSendfileFN sendfile; /* Send a (partial) file with header/trailer*/
+ PRConnectcontinueFN connectcontinue;
+ /* Continue a nonblocking connect */
+ PRReservedFN reserved_fn_3; /* reserved for future use */
+ PRReservedFN reserved_fn_2; /* reserved for future use */
+ PRReservedFN reserved_fn_1; /* reserved for future use */
+ PRReservedFN reserved_fn_0; /* reserved for future use */
+};
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_GetSpecialFD
+ * DESCRIPTION: Get the file descriptor that represents the standard input,
+ * output, or error stream.
+ * INPUTS:
+ * PRSpecialFD id
+ * A value indicating the type of stream desired:
+ * PR_StandardInput: standard input
+ * PR_StandardOuput: standard output
+ * PR_StandardError: standard error
+ * OUTPUTS: none
+ * RETURNS: PRFileDesc *
+ * If the argument is valid, PR_GetSpecialFD returns a file descriptor
+ * that represents the corresponding standard I/O stream. Otherwise,
+ * PR_GetSpecialFD returns NULL and sets error PR_INVALID_ARGUMENT_ERROR.
+ **************************************************************************
+ */
+
+typedef enum PRSpecialFD
+{
+ PR_StandardInput, /* standard input */
+ PR_StandardOutput, /* standard output */
+ PR_StandardError /* standard error */
+} PRSpecialFD;
+
+NSPR_API(PRFileDesc*) PR_GetSpecialFD(PRSpecialFD id);
+
+#define PR_STDIN PR_GetSpecialFD(PR_StandardInput)
+#define PR_STDOUT PR_GetSpecialFD(PR_StandardOutput)
+#define PR_STDERR PR_GetSpecialFD(PR_StandardError)
+
+/*
+ **************************************************************************
+ * Layering file descriptors
+ *
+ * File descriptors may be layered. Each layer has it's own identity.
+ * Identities are allocated by the runtime and are to be associated
+ * (by the layer implementor) with all layers that are of that type.
+ * It is then possible to scan the chain of layers and find a layer
+ * that one recongizes and therefore predict that it will implement
+ * a desired protocol.
+ *
+ * There are three well-known identities:
+ * PR_INVALID_IO_LAYER => an invalid layer identity, for error return
+ * PR_TOP_IO_LAYER => the identity of the top of the stack
+ * PR_NSPR_IO_LAYER => the identity used by NSPR proper
+ * PR_TOP_IO_LAYER may be used as a shorthand for identifying the topmost
+ * layer of an existing stack. Ie., the following two constructs are
+ * equivalent.
+ *
+ * rv = PR_PushIOLayer(stack, PR_TOP_IO_LAYER, my_layer);
+ * rv = PR_PushIOLayer(stack, PR_GetLayersIdentity(stack), my_layer)
+ *
+ * A string may be associated with the creation of the identity. It
+ * will be copied by the runtime. If queried the runtime will return
+ * a reference to that copied string (not yet another copy). There
+ * is no facility for deleting an identity.
+ **************************************************************************
+ */
+
+#define PR_IO_LAYER_HEAD (PRDescIdentity)-3
+#define PR_INVALID_IO_LAYER (PRDescIdentity)-1
+#define PR_TOP_IO_LAYER (PRDescIdentity)-2
+#define PR_NSPR_IO_LAYER (PRDescIdentity)0
+
+NSPR_API(PRDescIdentity) PR_GetUniqueIdentity(const char *layer_name);
+NSPR_API(const char*) PR_GetNameForIdentity(PRDescIdentity ident);
+NSPR_API(PRDescIdentity) PR_GetLayersIdentity(PRFileDesc* fd);
+NSPR_API(PRFileDesc*) PR_GetIdentitiesLayer(PRFileDesc* fd_stack, PRDescIdentity id);
+
+/*
+ **************************************************************************
+ * PR_GetDefaultIOMethods: Accessing the default methods table.
+ * You may get a pointer to the default methods table by calling this function.
+ * You may then select any elements from that table with which to build your
+ * layer's methods table. You may NOT modify the table directly.
+ **************************************************************************
+ */
+NSPR_API(const PRIOMethods *) PR_GetDefaultIOMethods(void);
+
+/*
+ **************************************************************************
+ * Creating a layer
+ *
+ * A new layer may be allocated by calling PR_CreateIOLayerStub(). The
+ * file descriptor returned will contain the pointer to the methods table
+ * provided. The runtime will not modify the table nor test its correctness.
+ **************************************************************************
+ */
+NSPR_API(PRFileDesc*) PR_CreateIOLayerStub(
+ PRDescIdentity ident, const PRIOMethods *methods);
+
+/*
+ **************************************************************************
+ * Creating a layer
+ *
+ * A new stack may be created by calling PR_CreateIOLayer(). The
+ * file descriptor returned will point to the top of the stack, which has
+ * the layer 'fd' as the topmost layer.
+ *
+ * NOTE: This function creates a new style stack, which has a fixed, dummy
+ * header. The old style stack, created by a call to PR_PushIOLayer,
+ * results in modifying contents of the top layer of the stack, when
+ * pushing and popping layers of the stack.
+ **************************************************************************
+ */
+NSPR_API(PRFileDesc*) PR_CreateIOLayer(PRFileDesc* fd);
+
+/*
+ **************************************************************************
+ * Pushing a layer
+ *
+ * A file descriptor (perhaps allocated using PR_CreateIOLayerStub()) may
+ * be pushed into an existing stack of file descriptors at any point the
+ * caller deems appropriate. The new layer will be inserted into the stack
+ * just above the layer with the indicated identity.
+ *
+ * Note: Even if the identity parameter indicates the top-most layer of
+ * the stack, the value of the file descriptor describing the original
+ * stack will not change.
+ **************************************************************************
+ */
+NSPR_API(PRStatus) PR_PushIOLayer(
+ PRFileDesc *fd_stack, PRDescIdentity id, PRFileDesc *layer);
+
+/*
+ **************************************************************************
+ * Popping a layer
+ *
+ * A layer may be popped from a stack by indicating the identity of the
+ * layer to be removed. If found, a pointer to the removed object will
+ * be returned to the caller. The object then becomes the responsibility
+ * of the caller.
+ *
+ * Note: Even if the identity indicates the top layer of the stack, the
+ * reference returned will not be the file descriptor for the stack and
+ * that file descriptor will remain valid.
+ **************************************************************************
+ */
+NSPR_API(PRFileDesc*) PR_PopIOLayer(PRFileDesc *fd_stack, PRDescIdentity id);
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_Open
+ * DESCRIPTION: Open a file for reading, writing, or both.
+ * INPUTS:
+ * const char *name
+ * The path name of the file to be opened
+ * PRIntn flags
+ * The file status flags.
+ * It is a bitwise OR of the following bit flags (only one of
+ * the first three flags below may be used):
+ * PR_RDONLY Open for reading only.
+ * PR_WRONLY Open for writing only.
+ * PR_RDWR Open for reading and writing.
+ * PR_CREATE_FILE If the file does not exist, the file is created
+ * If the file exists, this flag has no effect.
+ * PR_SYNC If set, each write will wait for both the file data
+ * and file status to be physically updated.
+ * PR_APPEND The file pointer is set to the end of
+ * the file prior to each write.
+ * PR_TRUNCATE If the file exists, its length is truncated to 0.
+ * PR_EXCL With PR_CREATE_FILE, if the file does not exist,
+ * the file is created. If the file already
+ * exists, no action and NULL is returned
+ *
+ * PRIntn mode
+ * The access permission bits of the file mode, if the file is
+ * created when PR_CREATE_FILE is on.
+ * OUTPUTS: None
+ * RETURNS: PRFileDesc *
+ * If the file is successfully opened,
+ * returns a pointer to the PRFileDesc
+ * created for the newly opened file.
+ * Returns a NULL pointer if the open
+ * failed.
+ * SIDE EFFECTS:
+ * RESTRICTIONS:
+ * MEMORY:
+ * The return value, if not NULL, points to a dynamically allocated
+ * PRFileDesc object.
+ * ALGORITHM:
+ **************************************************************************
+ */
+
+/* Open flags */
+#define PR_RDONLY 0x01
+#define PR_WRONLY 0x02
+#define PR_RDWR 0x04
+#define PR_CREATE_FILE 0x08
+#define PR_APPEND 0x10
+#define PR_TRUNCATE 0x20
+#define PR_SYNC 0x40
+#define PR_EXCL 0x80
+
+/*
+** File modes ....
+**
+** CAVEAT: 'mode' is currently only applicable on UNIX platforms.
+** The 'mode' argument may be ignored by PR_Open on other platforms.
+**
+** 00400 Read by owner.
+** 00200 Write by owner.
+** 00100 Execute (search if a directory) by owner.
+** 00040 Read by group.
+** 00020 Write by group.
+** 00010 Execute by group.
+** 00004 Read by others.
+** 00002 Write by others
+** 00001 Execute by others.
+**
+*/
+
+NSPR_API(PRFileDesc*) PR_Open(const char *name, PRIntn flags, PRIntn mode);
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_OpenFile
+ * DESCRIPTION:
+ * Open a file for reading, writing, or both.
+ * PR_OpenFile has the same prototype as PR_Open but implements
+ * the specified file mode where possible.
+ **************************************************************************
+ */
+
+/* File mode bits */
+#define PR_IRWXU 00700 /* read, write, execute/search by owner */
+#define PR_IRUSR 00400 /* read permission, owner */
+#define PR_IWUSR 00200 /* write permission, owner */
+#define PR_IXUSR 00100 /* execute/search permission, owner */
+#define PR_IRWXG 00070 /* read, write, execute/search by group */
+#define PR_IRGRP 00040 /* read permission, group */
+#define PR_IWGRP 00020 /* write permission, group */
+#define PR_IXGRP 00010 /* execute/search permission, group */
+#define PR_IRWXO 00007 /* read, write, execute/search by others */
+#define PR_IROTH 00004 /* read permission, others */
+#define PR_IWOTH 00002 /* write permission, others */
+#define PR_IXOTH 00001 /* execute/search permission, others */
+
+NSPR_API(PRFileDesc*) PR_OpenFile(
+ const char *name, PRIntn flags, PRIntn mode);
+
+#ifdef MOZ_UNICODE
+/*
+ * EXPERIMENTAL: This function may be removed in a future release.
+ */
+NSPR_API(PRFileDesc*) PR_OpenFileUTF16(
+ const PRUnichar *name, PRIntn flags, PRIntn mode);
+#endif /* MOZ_UNICODE */
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_Close
+ * DESCRIPTION:
+ * Close a file or socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * a pointer to a PRFileDesc.
+ * OUTPUTS:
+ * None.
+ * RETURN:
+ * PRStatus
+ * SIDE EFFECTS:
+ * RESTRICTIONS:
+ * None.
+ * MEMORY:
+ * The dynamic memory pointed to by the argument fd is freed.
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Close(PRFileDesc *fd);
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_Read
+ * DESCRIPTION:
+ * Read bytes from a file or socket.
+ * The operation will block until either an end of stream indication is
+ * encountered, some positive number of bytes are transferred, or there
+ * is an error. No more than 'amount' bytes will be transferred.
+ * INPUTS:
+ * PRFileDesc *fd
+ * pointer to the PRFileDesc object for the file or socket
+ * void *buf
+ * pointer to a buffer to hold the data read in.
+ * PRInt32 amount
+ * the size of 'buf' (in bytes)
+ * OUTPUTS:
+ * RETURN:
+ * PRInt32
+ * a positive number indicates the number of bytes actually read in.
+ * 0 means end of file is reached or the network connection is closed.
+ * -1 indicates a failure. The reason for the failure is obtained
+ * by calling PR_GetError().
+ * SIDE EFFECTS:
+ * data is written into the buffer pointed to by 'buf'.
+ * RESTRICTIONS:
+ * None.
+ * MEMORY:
+ * N/A
+ * ALGORITHM:
+ * N/A
+ **************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_Read(PRFileDesc *fd, void *buf, PRInt32 amount);
+
+/*
+ ***************************************************************************
+ * FUNCTION: PR_Write
+ * DESCRIPTION:
+ * Write a specified number of bytes to a file or socket. The thread
+ * invoking this function blocks until all the data is written.
+ * INPUTS:
+ * PRFileDesc *fd
+ * pointer to a PRFileDesc object that refers to a file or socket
+ * const void *buf
+ * pointer to the buffer holding the data
+ * PRInt32 amount
+ * amount of data in bytes to be written from the buffer
+ * OUTPUTS:
+ * None.
+ * RETURN: PRInt32
+ * A positive number indicates the number of bytes successfully written.
+ * A -1 is an indication that the operation failed. The reason
+ * for the failure is obtained by calling PR_GetError().
+ ***************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_Write(PRFileDesc *fd,const void *buf,PRInt32 amount);
+
+/*
+ ***************************************************************************
+ * FUNCTION: PR_Writev
+ * DESCRIPTION:
+ * Write data to a socket. The data is organized in a PRIOVec array. The
+ * operation will block until all the data is written or the operation
+ * fails.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Pointer that points to a PRFileDesc object for a socket.
+ * const PRIOVec *iov
+ * An array of PRIOVec. PRIOVec is a struct with the following
+ * two fields:
+ * char *iov_base;
+ * int iov_len;
+ * PRInt32 iov_size
+ * Number of elements in the iov array. The value of this
+ * argument must not be greater than PR_MAX_IOVECTOR_SIZE.
+ * If it is, the method will fail (PR_BUFFER_OVERFLOW_ERROR).
+ * PRIntervalTime timeout
+ * Time limit for completion of the entire write operation.
+ * OUTPUTS:
+ * None
+ * RETURN:
+ * A positive number indicates the number of bytes successfully written.
+ * A -1 is an indication that the operation failed. The reason
+ * for the failure is obtained by calling PR_GetError().
+ ***************************************************************************
+ */
+
+#define PR_MAX_IOVECTOR_SIZE 16 /* 'iov_size' must be <= */
+
+NSPR_API(PRInt32) PR_Writev(
+ PRFileDesc *fd, const PRIOVec *iov, PRInt32 iov_size,
+ PRIntervalTime timeout);
+
+/*
+ ***************************************************************************
+ * FUNCTION: PR_Delete
+ * DESCRIPTION:
+ * Delete a file from the filesystem. The operation may fail if the
+ * file is open.
+ * INPUTS:
+ * const char *name
+ * Path name of the file to be deleted.
+ * OUTPUTS:
+ * None.
+ * RETURN: PRStatus
+ * The function returns PR_SUCCESS if the file is successfully
+ * deleted, otherwise it returns PR_FAILURE.
+ ***************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Delete(const char *name);
+
+/**************************************************************************/
+
+typedef enum PRFileType
+{
+ PR_FILE_FILE = 1,
+ PR_FILE_DIRECTORY = 2,
+ PR_FILE_OTHER = 3
+} PRFileType;
+
+struct PRFileInfo {
+ PRFileType type; /* Type of file */
+ PROffset32 size; /* Size, in bytes, of file's contents */
+ PRTime creationTime; /* Creation time per definition of PRTime */
+ PRTime modifyTime; /* Last modification time per definition of PRTime */
+};
+
+struct PRFileInfo64 {
+ PRFileType type; /* Type of file */
+ PROffset64 size; /* Size, in bytes, of file's contents */
+ PRTime creationTime; /* Creation time per definition of PRTime */
+ PRTime modifyTime; /* Last modification time per definition of PRTime */
+};
+
+/****************************************************************************
+ * FUNCTION: PR_GetFileInfo, PR_GetFileInfo64
+ * DESCRIPTION:
+ * Get the information about the file with the given path name. This is
+ * applicable only to NSFileDesc describing 'file' types (see
+ * INPUTS:
+ * const char *fn
+ * path name of the file
+ * OUTPUTS:
+ * PRFileInfo *info
+ * Information about the given file is written into the file
+ * information object pointer to by 'info'.
+ * RETURN: PRStatus
+ * PR_GetFileInfo returns PR_SUCCESS if file information is successfully
+ * obtained, otherwise it returns PR_FAILURE.
+ ***************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_GetFileInfo(const char *fn, PRFileInfo *info);
+NSPR_API(PRStatus) PR_GetFileInfo64(const char *fn, PRFileInfo64 *info);
+
+#ifdef MOZ_UNICODE
+/*
+ * EXPERIMENTAL: This function may be removed in a future release.
+ */
+NSPR_API(PRStatus) PR_GetFileInfo64UTF16(const PRUnichar *fn, PRFileInfo64 *info);
+#endif /* MOZ_UNICODE */
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_GetOpenFileInfo, PR_GetOpenFileInfo64
+ * DESCRIPTION:
+ * Get information about an open file referred to by the
+ * given PRFileDesc object.
+ * INPUTS:
+ * const PRFileDesc *fd
+ * A reference to a valid, open file.
+ * OUTPUTS:
+ * Same as PR_GetFileInfo, PR_GetFileInfo64
+ * RETURN: PRStatus
+ * PR_GetFileInfo returns PR_SUCCESS if file information is successfully
+ * obtained, otherwise it returns PR_FAILURE.
+ ***************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_GetOpenFileInfo(PRFileDesc *fd, PRFileInfo *info);
+NSPR_API(PRStatus) PR_GetOpenFileInfo64(PRFileDesc *fd, PRFileInfo64 *info);
+
+/*
+ **************************************************************************
+ * FUNCTION: PR_Rename
+ * DESCRIPTION:
+ * Rename a file from the old name 'from' to the new name 'to'.
+ * INPUTS:
+ * const char *from
+ * The old name of the file to be renamed.
+ * const char *to
+ * The new name of the file.
+ * OUTPUTS:
+ * None.
+ * RETURN: PRStatus
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Rename(const char *from, const char *to);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Access
+ * DESCRIPTION:
+ * Determine accessibility of a file.
+ * INPUTS:
+ * const char *name
+ * path name of the file
+ * PRAccessHow how
+ * specifies which access permission to check for.
+ * It can be one of the following values:
+ * PR_ACCESS_READ_OK Test for read permission
+ * PR_ACCESS_WRITE_OK Test for write permission
+ * PR_ACCESS_EXISTS Check existence of file
+ * OUTPUTS:
+ * None.
+ * RETURN: PRStatus
+ * PR_SUCCESS is returned if the requested access is permitted.
+ * Otherwise, PR_FAILURE is returned. Additional information
+ * regarding the reason for the failure may be retrieved from
+ * PR_GetError().
+ *************************************************************************
+ */
+
+typedef enum PRAccessHow {
+ PR_ACCESS_EXISTS = 1,
+ PR_ACCESS_WRITE_OK = 2,
+ PR_ACCESS_READ_OK = 3
+} PRAccessHow;
+
+NSPR_API(PRStatus) PR_Access(const char *name, PRAccessHow how);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Seek, PR_Seek64
+ * DESCRIPTION:
+ * Moves read-write file offset
+ * INPUTS:
+ * PRFileDesc *fd
+ * Pointer to a PRFileDesc object.
+ * PROffset32, PROffset64 offset
+ * Specifies a value, in bytes, that is used in conjunction
+ * with the 'whence' parameter to set the file pointer. A
+ * negative value causes seeking in the reverse direction.
+ * PRSeekWhence whence
+ * Specifies how to interpret the 'offset' parameter in setting
+ * the file pointer associated with the 'fd' parameter.
+ * Values for the 'whence' parameter are:
+ * PR_SEEK_SET Sets the file pointer to the value of the
+ * 'offset' parameter
+ * PR_SEEK_CUR Sets the file pointer to its current location
+ * plus the value of the offset parameter.
+ * PR_SEEK_END Sets the file pointer to the size of the
+ * file plus the value of the offset parameter.
+ * OUTPUTS:
+ * None.
+ * RETURN: PROffset32, PROffset64
+ * Upon successful completion, the resulting pointer location,
+ * measured in bytes from the beginning of the file, is returned.
+ * If the PR_Seek() function fails, the file offset remains
+ * unchanged, and the returned value is -1. The error code can
+ * then be retrieved via PR_GetError().
+ *************************************************************************
+ */
+
+NSPR_API(PROffset32) PR_Seek(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence);
+NSPR_API(PROffset64) PR_Seek64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence);
+
+/*
+ ************************************************************************
+ * FUNCTION: PR_Available
+ * DESCRIPTION:
+ * Determine the amount of data in bytes available for reading
+ * in the given file or socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Pointer to a PRFileDesc object that refers to a file or
+ * socket.
+ * OUTPUTS:
+ * None
+ * RETURN: PRInt32, PRInt64
+ * Upon successful completion, PR_Available returns the number of
+ * bytes beyond the current read pointer that is available for
+ * reading. Otherwise, it returns a -1 and the reason for the
+ * failure can be retrieved via PR_GetError().
+ ************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_Available(PRFileDesc *fd);
+NSPR_API(PRInt64) PR_Available64(PRFileDesc *fd);
+
+/*
+ ************************************************************************
+ * FUNCTION: PR_Sync
+ * DESCRIPTION:
+ * Sync any buffered data for a fd to its backing device (disk).
+ * INPUTS:
+ * PRFileDesc *fd
+ * Pointer to a PRFileDesc object that refers to a file or
+ * socket
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * PR_SUCCESS is returned if the requested access is permitted.
+ * Otherwise, PR_FAILURE is returned.
+ ************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Sync(PRFileDesc *fd);
+
+/************************************************************************/
+
+struct PRDirEntry {
+ const char *name; /* name of entry, relative to directory name */
+};
+
+#ifdef MOZ_UNICODE
+struct PRDirEntryUTF16 {
+ const PRUnichar *name; /* name of entry in UTF16, relative to
+ * directory name */
+};
+#endif /* MOZ_UNICODE */
+
+#if !defined(NO_NSPR_10_SUPPORT)
+#define PR_DirName(dirEntry) (dirEntry->name)
+#endif
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_OpenDir
+ * DESCRIPTION:
+ * Open the directory by the given name
+ * INPUTS:
+ * const char *name
+ * path name of the directory to be opened
+ * OUTPUTS:
+ * None
+ * RETURN: PRDir *
+ * If the directory is sucessfully opened, a PRDir object is
+ * dynamically allocated and a pointer to it is returned.
+ * If the directory cannot be opened, a NULL pointer is returned.
+ * MEMORY:
+ * Upon successful completion, the return value points to
+ * dynamically allocated memory.
+ *************************************************************************
+ */
+
+NSPR_API(PRDir*) PR_OpenDir(const char *name);
+
+#ifdef MOZ_UNICODE
+/*
+ * EXPERIMENTAL: This function may be removed in a future release.
+ */
+NSPR_API(PRDirUTF16*) PR_OpenDirUTF16(const PRUnichar *name);
+#endif /* MOZ_UNICODE */
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_ReadDir
+ * DESCRIPTION:
+ * INPUTS:
+ * PRDir *dir
+ * pointer to a PRDir object that designates an open directory
+ * PRDirFlags flags
+ * PR_SKIP_NONE Do not skip any files
+ * PR_SKIP_DOT Skip the directory entry "." that
+ * represents the current directory
+ * PR_SKIP_DOT_DOT Skip the directory entry ".." that
+ * represents the parent directory.
+ * PR_SKIP_BOTH Skip both '.' and '..'
+ * PR_SKIP_HIDDEN Skip hidden files
+ * OUTPUTS:
+ * RETURN: PRDirEntry*
+ * Returns a pointer to the next entry in the directory. Returns
+ * a NULL pointer upon reaching the end of the directory or when an
+ * error occurs. The actual reason can be retrieved via PR_GetError().
+ *************************************************************************
+ */
+
+typedef enum PRDirFlags {
+ PR_SKIP_NONE = 0x0,
+ PR_SKIP_DOT = 0x1,
+ PR_SKIP_DOT_DOT = 0x2,
+ PR_SKIP_BOTH = 0x3,
+ PR_SKIP_HIDDEN = 0x4
+} PRDirFlags;
+
+NSPR_API(PRDirEntry*) PR_ReadDir(PRDir *dir, PRDirFlags flags);
+
+#ifdef MOZ_UNICODE
+/*
+ * EXPERIMENTAL: This function may be removed in a future release.
+ */
+NSPR_API(PRDirEntryUTF16*) PR_ReadDirUTF16(PRDirUTF16 *dir, PRDirFlags flags);
+#endif /* MOZ_UNICODE */
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_CloseDir
+ * DESCRIPTION:
+ * Close the specified directory.
+ * INPUTS:
+ * PRDir *dir
+ * The directory to be closed.
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * If successful, will return a status of PR_SUCCESS. Otherwise
+ * a value of PR_FAILURE. The reason for the failure may be re-
+ * trieved using PR_GetError().
+ *************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_CloseDir(PRDir *dir);
+
+#ifdef MOZ_UNICODE
+/*
+ * EXPERIMENTAL: This function may be removed in a future release.
+ */
+NSPR_API(PRStatus) PR_CloseDirUTF16(PRDirUTF16 *dir);
+#endif /* MOZ_UNICODE */
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_MkDir
+ * DESCRIPTION:
+ * Create a new directory with the given name and access mode.
+ * INPUTS:
+ * const char *name
+ * The name of the directory to be created. All the path components
+ * up to but not including the leaf component must already exist.
+ * PRIntn mode
+ * See 'mode' definiton in PR_Open().
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * If successful, will return a status of PR_SUCCESS. Otherwise
+ * a value of PR_FAILURE. The reason for the failure may be re-
+ * trieved using PR_GetError().
+ *************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_MkDir(const char *name, PRIntn mode);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_MakeDir
+ * DESCRIPTION:
+ * Create a new directory with the given name and access mode.
+ * PR_MakeDir has the same prototype as PR_MkDir but implements
+ * the specified access mode where possible.
+ *************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_MakeDir(const char *name, PRIntn mode);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_RmDir
+ * DESCRIPTION:
+ * Remove a directory by the given name.
+ * INPUTS:
+ * const char *name
+ * The name of the directory to be removed. All the path components
+ * must already exist. Only the leaf component will be removed.
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * If successful, will return a status of PR_SUCCESS. Otherwise
+ * a value of PR_FAILURE. The reason for the failure may be re-
+ * trieved using PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_RmDir(const char *name);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_NewUDPSocket
+ * DESCRIPTION:
+ * Create a new UDP socket.
+ * INPUTS:
+ * None
+ * OUTPUTS:
+ * None
+ * RETURN: PRFileDesc*
+ * Upon successful completion, PR_NewUDPSocket returns a pointer
+ * to the PRFileDesc created for the newly opened UDP socket.
+ * Returns a NULL pointer if the creation of a new UDP socket failed.
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*) PR_NewUDPSocket(void);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_NewTCPSocket
+ * DESCRIPTION:
+ * Create a new TCP socket.
+ * INPUTS:
+ * None
+ * OUTPUTS:
+ * None
+ * RETURN: PRFileDesc*
+ * Upon successful completion, PR_NewTCPSocket returns a pointer
+ * to the PRFileDesc created for the newly opened TCP socket.
+ * Returns a NULL pointer if the creation of a new TCP socket failed.
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*) PR_NewTCPSocket(void);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_OpenUDPSocket
+ * DESCRIPTION:
+ * Create a new UDP socket of the specified address family.
+ * INPUTS:
+ * PRIntn af
+ * Address family
+ * OUTPUTS:
+ * None
+ * RETURN: PRFileDesc*
+ * Upon successful completion, PR_OpenUDPSocket returns a pointer
+ * to the PRFileDesc created for the newly opened UDP socket.
+ * Returns a NULL pointer if the creation of a new UDP socket failed.
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*) PR_OpenUDPSocket(PRIntn af);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_OpenTCPSocket
+ * DESCRIPTION:
+ * Create a new TCP socket of the specified address family.
+ * INPUTS:
+ * PRIntn af
+ * Address family
+ * OUTPUTS:
+ * None
+ * RETURN: PRFileDesc*
+ * Upon successful completion, PR_NewTCPSocket returns a pointer
+ * to the PRFileDesc created for the newly opened TCP socket.
+ * Returns a NULL pointer if the creation of a new TCP socket failed.
+ *
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*) PR_OpenTCPSocket(PRIntn af);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Connect
+ * DESCRIPTION:
+ * Initiate a connection on a socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object representing a socket
+ * PRNetAddr *addr
+ * Specifies the address of the socket in its own communication
+ * space.
+ * PRIntervalTime timeout
+ * The function uses the lesser of the provided timeout and
+ * the OS's connect timeout. In particular, if you specify
+ * PR_INTERVAL_NO_TIMEOUT as the timeout, the OS's connection
+ * time limit will be used.
+ *
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * Upon successful completion of connection initiation, PR_Connect
+ * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
+ * failure information can be obtained by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Connect(
+ PRFileDesc *fd, const PRNetAddr *addr, PRIntervalTime timeout);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_ConnectContinue
+ * DESCRIPTION:
+ * Continue a nonblocking connect. After a nonblocking connect
+ * is initiated with PR_Connect() (which fails with
+ * PR_IN_PROGRESS_ERROR), one should call PR_Poll() on the socket,
+ * with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT. When
+ * PR_Poll() returns, one calls PR_ConnectContinue() on the
+ * socket to determine whether the nonblocking connect has
+ * completed or is still in progress. Repeat the PR_Poll(),
+ * PR_ConnectContinue() sequence until the nonblocking connect
+ * has completed.
+ * INPUTS:
+ * PRFileDesc *fd
+ * the file descriptor representing a socket
+ * PRInt16 out_flags
+ * the out_flags field of the poll descriptor returned by
+ * PR_Poll()
+ * RETURN: PRStatus
+ * If the nonblocking connect has successfully completed,
+ * PR_ConnectContinue returns PR_SUCCESS. If PR_ConnectContinue()
+ * returns PR_FAILURE, call PR_GetError():
+ * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
+ * progress and has not completed yet. The caller should poll
+ * on the file descriptor for the in_flags
+ * PR_POLL_WRITE|PR_POLL_EXCEPT and retry PR_ConnectContinue
+ * later when PR_Poll() returns.
+ * - Other errors: the nonblocking connect has failed with this
+ * error code.
+ */
+
+NSPR_API(PRStatus) PR_ConnectContinue(PRFileDesc *fd, PRInt16 out_flags);
+
+/*
+ *************************************************************************
+ * THIS FUNCTION IS DEPRECATED. USE PR_ConnectContinue INSTEAD.
+ *
+ * FUNCTION: PR_GetConnectStatus
+ * DESCRIPTION:
+ * Get the completion status of a nonblocking connect. After
+ * a nonblocking connect is initiated with PR_Connect() (which
+ * fails with PR_IN_PROGRESS_ERROR), one should call PR_Poll()
+ * on the socket, with the in_flags PR_POLL_WRITE | PR_POLL_EXCEPT.
+ * When PR_Poll() returns, one calls PR_GetConnectStatus on the
+ * PRPollDesc structure to determine whether the nonblocking
+ * connect has succeeded or failed.
+ * INPUTS:
+ * const PRPollDesc *pd
+ * Pointer to a PRPollDesc whose fd member is the socket,
+ * and in_flags must contain PR_POLL_WRITE and PR_POLL_EXCEPT.
+ * PR_Poll() should have been called and set the out_flags.
+ * RETURN: PRStatus
+ * If the nonblocking connect has successfully completed,
+ * PR_GetConnectStatus returns PR_SUCCESS. If PR_GetConnectStatus()
+ * returns PR_FAILURE, call PR_GetError():
+ * - PR_IN_PROGRESS_ERROR: the nonblocking connect is still in
+ * progress and has not completed yet.
+ * - Other errors: the nonblocking connect has failed with this
+ * error code.
+ */
+
+NSPR_API(PRStatus) PR_GetConnectStatus(const PRPollDesc *pd);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Accept
+ * DESCRIPTION:
+ * Accept a connection on a socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object representing the rendezvous socket
+ * on which the caller is willing to accept new connections.
+ * PRIntervalTime timeout
+ * Time limit for completion of the accept operation.
+ * OUTPUTS:
+ * PRNetAddr *addr
+ * Returns the address of the connecting entity in its own
+ * communication space. It may be NULL.
+ * RETURN: PRFileDesc*
+ * Upon successful acceptance of a connection, PR_Accept
+ * returns a valid file descriptor. Otherwise, it returns NULL.
+ * Further failure information can be obtained by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRFileDesc*) PR_Accept(
+ PRFileDesc *fd, PRNetAddr *addr, PRIntervalTime timeout);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Bind
+ * DESCRIPTION:
+ * Bind an address to a socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object representing a socket.
+ * PRNetAddr *addr
+ * Specifies the address to which the socket will be bound.
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * Upon successful binding of an address to a socket, PR_Bind
+ * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
+ * failure information can be obtained by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Bind(PRFileDesc *fd, const PRNetAddr *addr);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Listen
+ * DESCRIPTION:
+ * Listen for connections on a socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object representing a socket that will be
+ * used to listen for new connections.
+ * PRIntn backlog
+ * Specifies the maximum length of the queue of pending connections.
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * Upon successful completion of listen request, PR_Listen
+ * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
+ * failure information can be obtained by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRStatus) PR_Listen(PRFileDesc *fd, PRIntn backlog);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Shutdown
+ * DESCRIPTION:
+ * Shut down part of a full-duplex connection on a socket.
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object representing a connected socket.
+ * PRIntn how
+ * Specifies the kind of disallowed operations on the socket.
+ * PR_SHUTDOWN_RCV - Further receives will be disallowed
+ * PR_SHUTDOWN_SEND - Further sends will be disallowed
+ * PR_SHUTDOWN_BOTH - Further sends and receives will be disallowed
+ * OUTPUTS:
+ * None
+ * RETURN: PRStatus
+ * Upon successful completion of shutdown request, PR_Shutdown
+ * returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
+ * failure information can be obtained by calling PR_GetError().
+ **************************************************************************
+ */
+
+typedef enum PRShutdownHow
+{
+ PR_SHUTDOWN_RCV = 0, /* disallow further receives */
+ PR_SHUTDOWN_SEND = 1, /* disallow further sends */
+ PR_SHUTDOWN_BOTH = 2 /* disallow further receives and sends */
+} PRShutdownHow;
+
+NSPR_API(PRStatus) PR_Shutdown(PRFileDesc *fd, PRShutdownHow how);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Recv
+ * DESCRIPTION:
+ * Receive a specified number of bytes from a connected socket.
+ * The operation will block until some positive number of bytes are
+ * transferred, a time out has occurred, or there is an error.
+ * No more than 'amount' bytes will be transferred.
+ * INPUTS:
+ * PRFileDesc *fd
+ * points to a PRFileDesc object representing a socket.
+ * void *buf
+ * pointer to a buffer to hold the data received.
+ * PRInt32 amount
+ * the size of 'buf' (in bytes)
+ * PRIntn flags
+ * must be zero or PR_MSG_PEEK.
+ * PRIntervalTime timeout
+ * Time limit for completion of the receive operation.
+ * OUTPUTS:
+ * None
+ * RETURN: PRInt32
+ * a positive number indicates the number of bytes actually received.
+ * 0 means the network connection is closed.
+ * -1 indicates a failure. The reason for the failure is obtained
+ * by calling PR_GetError().
+ **************************************************************************
+ */
+
+#define PR_MSG_PEEK 0x2
+
+NSPR_API(PRInt32) PR_Recv(PRFileDesc *fd, void *buf, PRInt32 amount,
+ PRIntn flags, PRIntervalTime timeout);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_Send
+ * DESCRIPTION:
+ * Send a specified number of bytes from a connected socket.
+ * The operation will block until all bytes are
+ * processed, a time out has occurred, or there is an error.
+ * INPUTS:
+ * PRFileDesc *fd
+ * points to a PRFileDesc object representing a socket.
+ * void *buf
+ * pointer to a buffer from where the data is sent.
+ * PRInt32 amount
+ * the size of 'buf' (in bytes)
+ * PRIntn flags
+ * (OBSOLETE - must always be zero)
+ * PRIntervalTime timeout
+ * Time limit for completion of the send operation.
+ * OUTPUTS:
+ * None
+ * RETURN: PRInt32
+ * A positive number indicates the number of bytes successfully processed.
+ * This number must always equal 'amount'. A -1 is an indication that the
+ * operation failed. The reason for the failure is obtained by calling
+ * PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_Send(PRFileDesc *fd, const void *buf, PRInt32 amount,
+ PRIntn flags, PRIntervalTime timeout);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_RecvFrom
+ * DESCRIPTION:
+ * Receive up to a specified number of bytes from socket which may
+ * or may not be connected.
+ * The operation will block until one or more bytes are
+ * transferred, a time out has occurred, or there is an error.
+ * No more than 'amount' bytes will be transferred.
+ * INPUTS:
+ * PRFileDesc *fd
+ * points to a PRFileDesc object representing a socket.
+ * void *buf
+ * pointer to a buffer to hold the data received.
+ * PRInt32 amount
+ * the size of 'buf' (in bytes)
+ * PRIntn flags
+ * (OBSOLETE - must always be zero)
+ * PRNetAddr *addr
+ * Specifies the address of the sending peer. It may be NULL.
+ * PRIntervalTime timeout
+ * Time limit for completion of the receive operation.
+ * OUTPUTS:
+ * None
+ * RETURN: PRInt32
+ * a positive number indicates the number of bytes actually received.
+ * 0 means the network connection is closed.
+ * -1 indicates a failure. The reason for the failure is obtained
+ * by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_RecvFrom(
+ PRFileDesc *fd, void *buf, PRInt32 amount, PRIntn flags,
+ PRNetAddr *addr, PRIntervalTime timeout);
+
+/*
+ *************************************************************************
+ * FUNCTION: PR_SendTo
+ * DESCRIPTION:
+ * Send a specified number of bytes from an unconnected socket.
+ * The operation will block until all bytes are
+ * sent, a time out has occurred, or there is an error.
+ * INPUTS:
+ * PRFileDesc *fd
+ * points to a PRFileDesc object representing an unconnected socket.
+ * void *buf
+ * pointer to a buffer from where the data is sent.
+ * PRInt32 amount
+ * the size of 'buf' (in bytes)
+ * PRIntn flags
+ * (OBSOLETE - must always be zero)
+ * PRNetAddr *addr
+ * Specifies the address of the peer.
+.* PRIntervalTime timeout
+ * Time limit for completion of the send operation.
+ * OUTPUTS:
+ * None
+ * RETURN: PRInt32
+ * A positive number indicates the number of bytes successfully sent.
+ * -1 indicates a failure. The reason for the failure is obtained
+ * by calling PR_GetError().
+ **************************************************************************
+ */
+
+NSPR_API(PRInt32) PR_SendTo(
+ PRFileDesc *fd, const void *buf, PRInt32 amount, PRIntn flags,
+ const PRNetAddr *addr, PRIntervalTime timeout);
+
+/*
+*************************************************************************
+** FUNCTION: PR_TransmitFile
+** DESCRIPTION:
+** Transmitfile sends a complete file (sourceFile) across a socket
+** (networkSocket). If headers is non-NULL, the headers will be sent across
+** the socket prior to sending the file.
+**
+** Optionally, the PR_TRANSMITFILE_CLOSE_SOCKET flag may be passed to
+** transmitfile. This flag specifies that transmitfile should close the
+** socket after sending the data.
+**
+** INPUTS:
+** PRFileDesc *networkSocket
+** The socket to send data over
+** PRFileDesc *sourceFile
+** The file to send
+** const void *headers
+** A pointer to headers to be sent before sending data
+** PRInt32 hlen
+** length of header buffers in bytes.
+** PRTransmitFileFlags flags
+** If the flags indicate that the connection should be closed,
+** it will be done immediately after transferring the file, unless
+** the operation is unsuccessful.
+.* PRIntervalTime timeout
+ * Time limit for completion of the transmit operation.
+**
+** RETURNS:
+** Returns the number of bytes written or -1 if the operation failed.
+** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_
+** SOCKET flag is ignored. The reason for the failure is obtained
+** by calling PR_GetError().
+**************************************************************************
+*/
+
+NSPR_API(PRInt32) PR_TransmitFile(
+ PRFileDesc *networkSocket, PRFileDesc *sourceFile,
+ const void *headers, PRInt32 hlen, PRTransmitFileFlags flags,
+ PRIntervalTime timeout);
+
+/*
+*************************************************************************
+** FUNCTION: PR_SendFile
+** DESCRIPTION:
+** PR_SendFile sends data from a file (sendData->fd) across a socket
+** (networkSocket). If specified, a header and/or trailer buffer are sent
+** before and after the file, respectively. The file offset, number of bytes
+** of file data to send, the header and trailer buffers are specified in the
+** sendData argument.
+**
+** Optionally, if the PR_TRANSMITFILE_CLOSE_SOCKET flag is passed, the
+** socket is closed after successfully sending the data.
+**
+** INPUTS:
+** PRFileDesc *networkSocket
+** The socket to send data over
+** PRSendFileData *sendData
+** Contains the FD, file offset and length, header and trailer
+** buffer specifications.
+** PRTransmitFileFlags flags
+** If the flags indicate that the connection should be closed,
+** it will be done immediately after transferring the file, unless
+** the operation is unsuccessful.
+.* PRIntervalTime timeout
+ * Time limit for completion of the send operation.
+**
+** RETURNS:
+** Returns the number of bytes written or -1 if the operation failed.
+** If an error occurs while sending the file, the PR_TRANSMITFILE_CLOSE_
+** SOCKET flag is ignored. The reason for the failure is obtained
+** by calling PR_GetError().
+**************************************************************************
+*/
+
+struct PRSendFileData {
+ PRFileDesc *fd; /* file to send */
+ PRUint32 file_offset; /* file offset */
+ PRSize file_nbytes; /* number of bytes of file data to send */
+ /* if 0, send data from file_offset to */
+ /* end-of-file. */
+ const void *header; /* header buffer */
+ PRInt32 hlen; /* header len */
+ const void *trailer; /* trailer buffer */
+ PRInt32 tlen; /* trailer len */
+};
+
+
+NSPR_API(PRInt32) PR_SendFile(
+ PRFileDesc *networkSocket, PRSendFileData *sendData,
+ PRTransmitFileFlags flags, PRIntervalTime timeout);
+
+/*
+*************************************************************************
+** FUNCTION: PR_AcceptRead
+** DESCRIPTION:
+** AcceptRead accepts a new connection, returns the newly created
+** socket's descriptor and also returns the connecting peer's address.
+** AcceptRead, as its name suggests, also receives the first block of data
+** sent by the peer.
+**
+** INPUTS:
+** PRFileDesc *listenSock
+** A socket descriptor that has been called with the PR_Listen()
+** function, also known as the rendezvous socket.
+** void *buf
+** A pointer to a buffer to receive data sent by the client. This
+** buffer must be large enough to receive <amount> bytes of data
+** and two PRNetAddr structures, plus an extra 32 bytes. See:
+** PR_ACCEPT_READ_BUF_OVERHEAD.
+** PRInt32 amount
+** The number of bytes of client data to receive. Does not include
+** the size of the PRNetAddr structures. If 0, no data will be read
+** from the client.
+** PRIntervalTime timeout
+** The timeout interval only applies to the read portion of the
+** operation. PR_AcceptRead will block indefinitely until the
+** connection is accepted; the read will timeout after the timeout
+** interval elapses.
+** OUTPUTS:
+** PRFileDesc **acceptedSock
+** The file descriptor for the newly connected socket. This parameter
+** will only be valid if the function return does not indicate failure.
+** PRNetAddr **peerAddr,
+** The address of the remote socket. This parameter will only be
+** valid if the function return does not indicate failure. The
+** returned address is not guaranteed to be properly aligned.
+**
+** RETURNS:
+** The number of bytes read from the client or -1 on failure. The reason
+** for the failure is obtained by calling PR_GetError().
+**************************************************************************
+**/
+/* define buffer overhead constant. Add this value to the user's
+** data length when allocating a buffer to accept data.
+** Example:
+** #define USER_DATA_SIZE 10
+** char buf[USER_DATA_SIZE + PR_ACCEPT_READ_BUF_OVERHEAD];
+** bytesRead = PR_AcceptRead( s, fd, &a, &p, USER_DATA_SIZE, ...);
+*/
+#define PR_ACCEPT_READ_BUF_OVERHEAD (32+(2*sizeof(PRNetAddr)))
+
+NSPR_API(PRInt32) PR_AcceptRead(
+ PRFileDesc *listenSock, PRFileDesc **acceptedSock,
+ PRNetAddr **peerAddr, void *buf, PRInt32 amount, PRIntervalTime timeout);
+
+/*
+*************************************************************************
+** FUNCTION: PR_NewTCPSocketPair
+** DESCRIPTION:
+** Create a new TCP socket pair. The returned descriptors can be used
+** interchangeably; they are interconnected full-duplex descriptors: data
+** written to one can be read from the other and vice-versa.
+**
+** INPUTS:
+** None
+** OUTPUTS:
+** PRFileDesc *fds[2]
+** The file descriptor pair for the newly created TCP sockets.
+** RETURN: PRStatus
+** Upon successful completion of TCP socket pair, PR_NewTCPSocketPair
+** returns PR_SUCCESS. Otherwise, it returns PR_FAILURE. Further
+** failure information can be obtained by calling PR_GetError().
+** XXX can we implement this on windoze and mac?
+**************************************************************************
+**/
+NSPR_API(PRStatus) PR_NewTCPSocketPair(PRFileDesc *fds[2]);
+
+/*
+*************************************************************************
+** FUNCTION: PR_GetSockName
+** DESCRIPTION:
+** Get socket name. Return the network address for this socket.
+**
+** INPUTS:
+** PRFileDesc *fd
+** Points to a PRFileDesc object representing the socket.
+** OUTPUTS:
+** PRNetAddr *addr
+** Returns the address of the socket in its own communication space.
+** RETURN: PRStatus
+** Upon successful completion, PR_GetSockName returns PR_SUCCESS.
+** Otherwise, it returns PR_FAILURE. Further failure information can
+** be obtained by calling PR_GetError().
+**************************************************************************
+**/
+NSPR_API(PRStatus) PR_GetSockName(PRFileDesc *fd, PRNetAddr *addr);
+
+/*
+*************************************************************************
+** FUNCTION: PR_GetPeerName
+** DESCRIPTION:
+** Get name of the connected peer. Return the network address for the
+** connected peer socket.
+**
+** INPUTS:
+** PRFileDesc *fd
+** Points to a PRFileDesc object representing the connected peer.
+** OUTPUTS:
+** PRNetAddr *addr
+** Returns the address of the connected peer in its own communication
+** space.
+** RETURN: PRStatus
+** Upon successful completion, PR_GetPeerName returns PR_SUCCESS.
+** Otherwise, it returns PR_FAILURE. Further failure information can
+** be obtained by calling PR_GetError().
+**************************************************************************
+**/
+NSPR_API(PRStatus) PR_GetPeerName(PRFileDesc *fd, PRNetAddr *addr);
+
+NSPR_API(PRStatus) PR_GetSocketOption(
+ PRFileDesc *fd, PRSocketOptionData *data);
+
+NSPR_API(PRStatus) PR_SetSocketOption(
+ PRFileDesc *fd, const PRSocketOptionData *data);
+
+/*
+ *********************************************************************
+ *
+ * File descriptor inheritance
+ *
+ *********************************************************************
+ */
+
+/*
+ ************************************************************************
+ * FUNCTION: PR_SetFDInheritable
+ * DESCRIPTION:
+ * Set the inheritance attribute of a file descriptor.
+ *
+ * INPUTS:
+ * PRFileDesc *fd
+ * Points to a PRFileDesc object.
+ * PRBool inheritable
+ * If PR_TRUE, the file descriptor fd is set to be inheritable
+ * by a child process. If PR_FALSE, the file descriptor is set
+ * to be not inheritable by a child process.
+ * RETURN: PRStatus
+ * Upon successful completion, PR_SetFDInheritable returns PR_SUCCESS.
+ * Otherwise, it returns PR_FAILURE. Further failure information can
+ * be obtained by calling PR_GetError().
+ *************************************************************************
+ */
+NSPR_API(PRStatus) PR_SetFDInheritable(
+ PRFileDesc *fd,
+ PRBool inheritable);
+
+/*
+ ************************************************************************
+ * FUNCTION: PR_GetInheritedFD
+ * DESCRIPTION:
+ * Get an inherited file descriptor with the specified name.
+ *
+ * INPUTS:
+ * const char *name
+ * The name of the inherited file descriptor.
+ * RETURN: PRFileDesc *
+ * Upon successful completion, PR_GetInheritedFD returns the
+ * inherited file descriptor with the specified name. Otherwise,
+ * it returns NULL. Further failure information can be obtained
+ * by calling PR_GetError().
+ *************************************************************************
+ */
+NSPR_API(PRFileDesc *) PR_GetInheritedFD(const char *name);
+
+/*
+ *********************************************************************
+ *
+ * Memory-mapped files
+ *
+ *********************************************************************
+ */
+
+typedef struct PRFileMap PRFileMap;
+
+/*
+ * protection options for read and write accesses of a file mapping
+ */
+typedef enum PRFileMapProtect {
+ PR_PROT_READONLY, /* read only */
+ PR_PROT_READWRITE, /* readable, and write is shared */
+ PR_PROT_WRITECOPY /* readable, and write is private (copy-on-write) */
+} PRFileMapProtect;
+
+NSPR_API(PRFileMap *) PR_CreateFileMap(
+ PRFileDesc *fd,
+ PRInt64 size,
+ PRFileMapProtect prot);
+
+/*
+ * return the alignment (in bytes) of the offset argument to PR_MemMap
+ */
+NSPR_API(PRInt32) PR_GetMemMapAlignment(void);
+
+NSPR_API(void *) PR_MemMap(
+ PRFileMap *fmap,
+ PROffset64 offset, /* must be aligned and sized according to the
+ * return value of PR_GetMemMapAlignment() */
+ PRUint32 len);
+
+NSPR_API(PRStatus) PR_MemUnmap(void *addr, PRUint32 len);
+
+NSPR_API(PRStatus) PR_CloseFileMap(PRFileMap *fmap);
+
+/*
+ * Synchronously flush the given memory-mapped address range of the given open
+ * file to disk. The function does not return until all modified data have
+ * been written to disk.
+ *
+ * On some platforms, the function will call PR_Sync(fd) internally if it is
+ * necessary for flushing modified data to disk synchronously.
+ */
+NSPR_API(PRStatus) PR_SyncMemMap(
+ PRFileDesc *fd,
+ void *addr,
+ PRUint32 len);
+
+/*
+ ******************************************************************
+ *
+ * Interprocess communication
+ *
+ ******************************************************************
+ */
+
+/*
+ * Creates an anonymous pipe and returns file descriptors for the
+ * read and write ends of the pipe.
+ */
+
+NSPR_API(PRStatus) PR_CreatePipe(
+ PRFileDesc **readPipe,
+ PRFileDesc **writePipe
+);
+
+/************************************************************************/
+/************** The following definitions are for poll ******************/
+/************************************************************************/
+
+struct PRPollDesc {
+ PRFileDesc* fd;
+ PRInt16 in_flags;
+ PRInt16 out_flags;
+};
+
+/*
+** Bit values for PRPollDesc.in_flags or PRPollDesc.out_flags. Binary-or
+** these together to produce the desired poll request.
+*/
+
+#if defined(_PR_POLL_BACKCOMPAT)
+
+#include <poll.h>
+#define PR_POLL_READ POLLIN
+#define PR_POLL_WRITE POLLOUT
+#define PR_POLL_EXCEPT POLLPRI
+#define PR_POLL_ERR POLLERR /* only in out_flags */
+#define PR_POLL_NVAL POLLNVAL /* only in out_flags when fd is bad */
+#define PR_POLL_HUP POLLHUP /* only in out_flags */
+
+#else /* _PR_POLL_BACKCOMPAT */
+
+#define PR_POLL_READ 0x1
+#define PR_POLL_WRITE 0x2
+#define PR_POLL_EXCEPT 0x4
+#define PR_POLL_ERR 0x8 /* only in out_flags */
+#define PR_POLL_NVAL 0x10 /* only in out_flags when fd is bad */
+#define PR_POLL_HUP 0x20 /* only in out_flags */
+
+#endif /* _PR_POLL_BACKCOMPAT */
+
+/*
+*************************************************************************
+** FUNCTION: PR_Poll
+** DESCRIPTION:
+**
+** The call returns as soon as I/O is ready on one or more of the underlying
+** socket objects. A count of the number of ready descriptors is
+** returned unless a timeout occurs in which case zero is returned.
+**
+** PRPollDesc.fd should be set to a pointer to a PRFileDesc object
+** representing a socket. This field can be set to NULL to indicate to
+** PR_Poll that this PRFileDesc object should be ignored.
+** PRPollDesc.in_flags should be set to the desired request
+** (read/write/except or some combination). Upon successful return from
+** this call PRPollDesc.out_flags will be set to indicate what kind of
+** i/o can be performed on the respective descriptor. PR_Poll() uses the
+** out_flags fields as scratch variables during the call. If PR_Poll()
+** returns 0 or -1, the out_flags fields do not contain meaningful values
+** and must not be used.
+**
+** INPUTS:
+** PRPollDesc *pds A pointer to an array of PRPollDesc
+**
+** PRIntn npds The number of elements in the array
+** If this argument is zero PR_Poll is
+** equivalent to a PR_Sleep(timeout).
+**
+** PRIntervalTime timeout Amount of time the call will block waiting
+** for I/O to become ready. If this time expires
+** w/o any I/O becoming ready, the result will
+** be zero.
+**
+** OUTPUTS: None
+** RETURN:
+** PRInt32 Number of PRPollDesc's with events or zero
+** if the function timed out or -1 on failure.
+** The reason for the failure is obtained by
+** calling PR_GetError().
+**************************************************************************
+*/
+NSPR_API(PRInt32) PR_Poll(
+ PRPollDesc *pds, PRIntn npds, PRIntervalTime timeout);
+
+/*
+**************************************************************************
+**
+** Pollable events
+**
+** A pollable event is a special kind of file descriptor.
+** The only I/O operation you can perform on a pollable event
+** is to poll it with the PR_POLL_READ flag. You can't
+** read from or write to a pollable event.
+**
+** The purpose of a pollable event is to combine event waiting
+** with I/O waiting in a single PR_Poll call. Pollable events
+** are implemented using a pipe or a pair of TCP sockets
+** connected via the loopback address, therefore setting and
+** waiting for pollable events are expensive operating system
+** calls. Do not use pollable events for general thread
+** synchronization. Use condition variables instead.
+**
+** A pollable event has two states: set and unset. Events
+** are not queued, so there is no notion of an event count.
+** A pollable event is either set or unset.
+**
+** A new pollable event is created by a PR_NewPollableEvent
+** call and is initially in the unset state.
+**
+** PR_WaitForPollableEvent blocks the calling thread until
+** the pollable event is set, and then it atomically unsets
+** the pollable event before it returns.
+**
+** To set a pollable event, call PR_SetPollableEvent.
+**
+** One can call PR_Poll with the PR_POLL_READ flag on a pollable
+** event. When the pollable event is set, PR_Poll returns with
+** the PR_POLL_READ flag set in the out_flags.
+**
+** To close a pollable event, call PR_DestroyPollableEvent
+** (not PR_Close).
+**
+**************************************************************************
+*/
+
+NSPR_API(PRFileDesc *) PR_NewPollableEvent(void);
+
+NSPR_API(PRStatus) PR_DestroyPollableEvent(PRFileDesc *event);
+
+NSPR_API(PRStatus) PR_SetPollableEvent(PRFileDesc *event);
+
+NSPR_API(PRStatus) PR_WaitForPollableEvent(PRFileDesc *event);
+
+PR_END_EXTERN_C
+
+#endif /* prio_h___ */