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+/* -*- 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/. */
+
+#ifndef nspr_pth_defs_h_
+#define nspr_pth_defs_h_
+
+/*
+** Appropriate definitions of entry points not used in a pthreads world
+*/
+#define _PR_MD_BLOCK_CLOCK_INTERRUPTS()
+#define _PR_MD_UNBLOCK_CLOCK_INTERRUPTS()
+#define _PR_MD_DISABLE_CLOCK_INTERRUPTS()
+#define _PR_MD_ENABLE_CLOCK_INTERRUPTS()
+
+/* In good standards fashion, the DCE threads (based on posix-4) are not
+ * quite the same as newer posix implementations. These are mostly name
+ * changes and small differences, so macros usually do the trick
+ */
+#ifdef _PR_DCETHREADS
+#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_create
+#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_delete
+#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), a)
+#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (0 == pthread_mutex_trylock(&(m)))
+#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_create
+#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), a)
+#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_delete
+
+/* Notes about differences between DCE threads and pthreads 10:
+ * 1. pthread_mutex_trylock returns 1 when it locks the mutex
+ * 0 when it does not. The latest pthreads has a set of errno-like
+ * return values.
+ * 2. return values from pthread_cond_timedwait are different.
+ *
+ *
+ *
+ */
+#elif defined(BSDI)
+/*
+ * Mutex and condition attributes are not supported. The attr
+ * argument to pthread_mutex_init() and pthread_cond_init() must
+ * be passed as NULL.
+ *
+ * The memset calls in _PT_PTHREAD_MUTEX_INIT and _PT_PTHREAD_COND_INIT
+ * are to work around BSDI's using a single bit to indicate a mutex
+ * or condition variable is initialized. This entire BSDI section
+ * will go away when BSDI releases updated threads libraries for
+ * BSD/OS 3.1 and 4.0.
+ */
+#define _PT_PTHREAD_MUTEXATTR_INIT(x) 0
+#define _PT_PTHREAD_MUTEXATTR_DESTROY(x) /* */
+#define _PT_PTHREAD_MUTEX_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
+ pthread_mutex_init(&(m), NULL))
+#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
+#define _PT_PTHREAD_CONDATTR_INIT(x) 0
+#define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */
+#define _PT_PTHREAD_COND_INIT(m, a) (memset(&(m), 0, sizeof(m)), \
+ pthread_cond_init(&(m), NULL))
+#else
+#define _PT_PTHREAD_MUTEXATTR_INIT pthread_mutexattr_init
+#define _PT_PTHREAD_MUTEXATTR_DESTROY pthread_mutexattr_destroy
+#define _PT_PTHREAD_MUTEX_INIT(m, a) pthread_mutex_init(&(m), &(a))
+#if defined(FREEBSD)
+#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) pt_pthread_mutex_is_locked(&(m))
+#else
+#define _PT_PTHREAD_MUTEX_IS_LOCKED(m) (EBUSY == pthread_mutex_trylock(&(m)))
+#endif
+#if defined(ANDROID)
+/* Conditional attribute init and destroy aren't implemented in bionic. */
+#define _PT_PTHREAD_CONDATTR_INIT(x) 0
+#define _PT_PTHREAD_CONDATTR_DESTROY(x) /* */
+#else
+#define _PT_PTHREAD_CONDATTR_INIT pthread_condattr_init
+#define _PT_PTHREAD_CONDATTR_DESTROY pthread_condattr_destroy
+#endif
+#define _PT_PTHREAD_COND_INIT(m, a) pthread_cond_init(&(m), &(a))
+#endif
+
+/* The pthreads standard does not specify an invalid value for the
+ * pthread_t handle. (0 is usually an invalid pthread identifier
+ * but there are exceptions, for example, DG/UX.) These macros
+ * define a way to set the handle to or compare the handle with an
+ * invalid identifier. These macros are not portable and may be
+ * more of a problem as we adapt to more pthreads implementations.
+ * They are only used in the PRMonitor functions. Do not use them
+ * in new code.
+ *
+ * Unfortunately some of our clients depend on certain properties
+ * of our PRMonitor implementation, preventing us from replacing
+ * it by a portable implementation.
+ * - High-performance servers like the fact that PR_EnterMonitor
+ * only calls PR_Lock and PR_ExitMonitor only calls PR_Unlock.
+ * (A portable implementation would use a PRLock and a PRCondVar
+ * to implement the recursive lock in a monitor and call both
+ * PR_Lock and PR_Unlock in PR_EnterMonitor and PR_ExitMonitor.)
+ * Unfortunately this forces us to read the monitor owner field
+ * without holding a lock.
+ * - One way to make it safe to read the monitor owner field
+ * without holding a lock is to make that field a PRThread*
+ * (one should be able to read a pointer with a single machine
+ * instruction). However, PR_GetCurrentThread calls calloc if
+ * it is called by a thread that was not created by NSPR. The
+ * malloc tracing tools in the Mozilla client use PRMonitor for
+ * locking in their malloc, calloc, and free functions. If
+ * PR_EnterMonitor calls any of these functions, infinite
+ * recursion ensues.
+ */
+#if defined(_PR_DCETHREADS)
+#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) \
+ memset(&(t), 0, sizeof(pthread_t))
+#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) \
+ (!memcmp(&(t), &pt_zero_tid, sizeof(pthread_t)))
+#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
+#elif defined(IRIX) || defined(OSF1) || defined(AIX) || defined(SOLARIS) \
+ || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
+ || defined(HPUX) || defined(FREEBSD) \
+ || defined(NETBSD) || defined(OPENBSD) || defined(BSDI) \
+ || defined(NTO) || defined(DARWIN) \
+ || defined(UNIXWARE) || defined(RISCOS) || defined(SYMBIAN)
+#define _PT_PTHREAD_INVALIDATE_THR_HANDLE(t) (t) = 0
+#define _PT_PTHREAD_THR_HANDLE_IS_INVALID(t) (t) == 0
+#define _PT_PTHREAD_COPY_THR_HANDLE(st, dt) (dt) = (st)
+#else
+#error "pthreads is not supported for this architecture"
+#endif
+
+#if defined(_PR_DCETHREADS)
+#define _PT_PTHREAD_ATTR_INIT pthread_attr_create
+#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_delete
+#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, a, f, r)
+#define _PT_PTHREAD_KEY_CREATE pthread_keycreate
+#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setsched
+#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) \
+ (*(s) = pthread_attr_getstacksize(*(a)), 0)
+#define _PT_PTHREAD_GETSPECIFIC(k, r) \
+ pthread_getspecific((k), (pthread_addr_t *) &(r))
+#elif defined(_PR_PTHREADS)
+#define _PT_PTHREAD_ATTR_INIT pthread_attr_init
+#define _PT_PTHREAD_ATTR_DESTROY pthread_attr_destroy
+#define _PT_PTHREAD_CREATE(t, a, f, r) pthread_create(t, &a, f, r)
+#define _PT_PTHREAD_KEY_CREATE pthread_key_create
+#define _PT_PTHREAD_ATTR_SETSCHEDPOLICY pthread_attr_setschedpolicy
+#define _PT_PTHREAD_ATTR_GETSTACKSIZE(a, s) pthread_attr_getstacksize(a, s)
+#define _PT_PTHREAD_GETSPECIFIC(k, r) (r) = pthread_getspecific(k)
+#else
+#error "Cannot determine pthread strategy"
+#endif
+
+#if defined(_PR_DCETHREADS)
+#define _PT_PTHREAD_EXPLICIT_SCHED _PT_PTHREAD_DEFAULT_SCHED
+#endif
+
+/*
+ * pthread_mutex_trylock returns different values in DCE threads and
+ * pthreads.
+ */
+#if defined(_PR_DCETHREADS)
+#define PT_TRYLOCK_SUCCESS 1
+#define PT_TRYLOCK_BUSY 0
+#else
+#define PT_TRYLOCK_SUCCESS 0
+#define PT_TRYLOCK_BUSY EBUSY
+#endif
+
+/*
+ * These platforms don't have sigtimedwait()
+ */
+#if (defined(AIX) && !defined(AIX4_3_PLUS)) \
+ || defined(LINUX) || defined(__GNU__)|| defined(__GLIBC__) \
+ || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
+ || defined(BSDI) || defined(UNIXWARE) \
+ || defined(DARWIN) || defined(SYMBIAN)
+#define PT_NO_SIGTIMEDWAIT
+#endif
+
+#if defined(OSF1)
+#define PT_PRIO_MIN PRI_OTHER_MIN
+#define PT_PRIO_MAX PRI_OTHER_MAX
+#elif defined(IRIX)
+#include <sys/sched.h>
+#define PT_PRIO_MIN PX_PRIO_MIN
+#define PT_PRIO_MAX PX_PRIO_MAX
+#elif defined(AIX)
+#include <sys/priv.h>
+#include <sys/sched.h>
+#ifndef PTHREAD_CREATE_JOINABLE
+#define PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED
+#endif
+#define PT_PRIO_MIN DEFAULT_PRIO
+#define PT_PRIO_MAX DEFAULT_PRIO
+#elif defined(HPUX)
+
+#if defined(_PR_DCETHREADS)
+#define PT_PRIO_MIN PRI_OTHER_MIN
+#define PT_PRIO_MAX PRI_OTHER_MAX
+#else /* defined(_PR_DCETHREADS) */
+#include <sys/sched.h>
+#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
+#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
+#endif /* defined(_PR_DCETHREADS) */
+
+#elif defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
+ || defined(FREEBSD) || defined(SYMBIAN)
+#define PT_PRIO_MIN sched_get_priority_min(SCHED_OTHER)
+#define PT_PRIO_MAX sched_get_priority_max(SCHED_OTHER)
+#elif defined(NTO)
+/*
+ * Neutrino has functions that return the priority range but
+ * they return invalid numbers, so I just hard coded these here
+ * for now. Jerry.Kirk@Nexarecorp.com
+ */
+#define PT_PRIO_MIN 0
+#define PT_PRIO_MAX 30
+#elif defined(SOLARIS)
+/*
+ * Solaris doesn't seem to have macros for the min/max priorities.
+ * The range of 0-127 is mentioned in the pthread_setschedparam(3T)
+ * man pages, and pthread_setschedparam indeed allows 0-127. However,
+ * pthread_attr_setschedparam does not allow 0; it allows 1-127.
+ */
+#define PT_PRIO_MIN 1
+#define PT_PRIO_MAX 127
+#elif defined(OPENBSD)
+#define PT_PRIO_MIN 0
+#define PT_PRIO_MAX 31
+#elif defined(NETBSD) \
+ || defined(BSDI) || defined(DARWIN) || defined(UNIXWARE) \
+ || defined(RISCOS) /* XXX */
+#define PT_PRIO_MIN 0
+#define PT_PRIO_MAX 126
+#else
+#error "pthreads is not supported for this architecture"
+#endif
+
+/*
+ * The _PT_PTHREAD_YIELD function is called from a signal handler.
+ * Needed for garbage collection -- Look at PR_Suspend/PR_Resume
+ * implementation.
+ */
+#if defined(_PR_DCETHREADS)
+#define _PT_PTHREAD_YIELD() pthread_yield()
+#elif defined(OSF1)
+/*
+ * sched_yield can't be called from a signal handler. Must use
+ * the _np version.
+ */
+#define _PT_PTHREAD_YIELD() pthread_yield_np()
+#elif defined(AIX)
+extern int (*_PT_aix_yield_fcn)();
+#define _PT_PTHREAD_YIELD() (*_PT_aix_yield_fcn)()
+#elif defined(IRIX)
+#include <time.h>
+#define _PT_PTHREAD_YIELD() \
+ PR_BEGIN_MACRO \
+ struct timespec onemillisec = {0}; \
+ onemillisec.tv_nsec = 1000000L; \
+ nanosleep(&onemillisec,NULL); \
+ PR_END_MACRO
+#elif defined(HPUX) || defined(SOLARIS) \
+ || defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) \
+ || defined(FREEBSD) || defined(NETBSD) || defined(OPENBSD) \
+ || defined(BSDI) || defined(NTO) || defined(DARWIN) \
+ || defined(UNIXWARE) || defined(RISCOS) || defined(SYMBIAN)
+#define _PT_PTHREAD_YIELD() sched_yield()
+#else
+#error "Need to define _PT_PTHREAD_YIELD for this platform"
+#endif
+
+#endif /* nspr_pth_defs_h_ */