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-rw-r--r--nsprpub/pr/src/md/windows/ntmisc.c1201
1 files changed, 1201 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/windows/ntmisc.c b/nsprpub/pr/src/md/windows/ntmisc.c
new file mode 100644
index 000000000..12f8c1df7
--- /dev/null
+++ b/nsprpub/pr/src/md/windows/ntmisc.c
@@ -0,0 +1,1201 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+/*
+ * ntmisc.c
+ *
+ */
+
+#include "primpl.h"
+#include <math.h> /* for fabs() */
+#include <windows.h>
+
+char *_PR_MD_GET_ENV(const char *name)
+{
+ return getenv(name);
+}
+
+/*
+** _PR_MD_PUT_ENV() -- add or change environment variable
+**
+**
+*/
+PRIntn _PR_MD_PUT_ENV(const char *name)
+{
+ return(putenv(name));
+}
+
+
+/*
+ **************************************************************************
+ **************************************************************************
+ **
+ ** Date and time routines
+ **
+ **************************************************************************
+ **************************************************************************
+ */
+
+/*
+ * The NSPR epoch (00:00:00 1 Jan 1970 UTC) in FILETIME.
+ * We store the value in a PRTime variable for convenience.
+ */
+#ifdef __GNUC__
+const PRTime _pr_filetime_offset = 116444736000000000LL;
+const PRTime _pr_filetime_divisor = 10LL;
+#else
+const PRTime _pr_filetime_offset = 116444736000000000i64;
+const PRTime _pr_filetime_divisor = 10i64;
+#endif
+
+#ifdef WINCE
+
+#define FILETIME_TO_INT64(ft) \
+ (((PRInt64)ft.dwHighDateTime) << 32 | (PRInt64)ft.dwLowDateTime)
+
+static void
+LowResTime(LPFILETIME lpft)
+{
+ GetCurrentFT(lpft);
+}
+
+typedef struct CalibrationData {
+ long double freq; /* The performance counter frequency */
+ long double offset; /* The low res 'epoch' */
+ long double timer_offset; /* The high res 'epoch' */
+
+ /* The last high res time that we returned since recalibrating */
+ PRInt64 last;
+
+ PRBool calibrated;
+
+ CRITICAL_SECTION data_lock;
+ CRITICAL_SECTION calibration_lock;
+ PRInt64 granularity;
+} CalibrationData;
+
+static CalibrationData calibration;
+
+typedef void (*GetSystemTimeAsFileTimeFcn)(LPFILETIME);
+static GetSystemTimeAsFileTimeFcn ce6_GetSystemTimeAsFileTime = NULL;
+
+static void
+NowCalibrate(void)
+{
+ FILETIME ft, ftStart;
+ LARGE_INTEGER liFreq, now;
+
+ if (calibration.freq == 0.0) {
+ if(!QueryPerformanceFrequency(&liFreq)) {
+ /* High-performance timer is unavailable */
+ calibration.freq = -1.0;
+ } else {
+ calibration.freq = (long double) liFreq.QuadPart;
+ }
+ }
+ if (calibration.freq > 0.0) {
+ PRInt64 calibrationDelta = 0;
+ /*
+ * By wrapping a timeBegin/EndPeriod pair of calls around this loop,
+ * the loop seems to take much less time (1 ms vs 15ms) on Vista.
+ */
+ timeBeginPeriod(1);
+ LowResTime(&ftStart);
+ do {
+ LowResTime(&ft);
+ } while (memcmp(&ftStart,&ft, sizeof(ft)) == 0);
+ timeEndPeriod(1);
+
+ calibration.granularity =
+ (FILETIME_TO_INT64(ft) - FILETIME_TO_INT64(ftStart))/10;
+
+ QueryPerformanceCounter(&now);
+
+ calibration.offset = (long double) FILETIME_TO_INT64(ft);
+ calibration.timer_offset = (long double) now.QuadPart;
+ /*
+ * The windows epoch is around 1600. The unix epoch is around 1970.
+ * _pr_filetime_offset is the difference (in windows time units which
+ * are 10 times more highres than the JS time unit)
+ */
+ calibration.offset -= _pr_filetime_offset;
+ calibration.offset *= 0.1;
+ calibration.last = 0;
+
+ calibration.calibrated = PR_TRUE;
+ }
+}
+
+#define CALIBRATIONLOCK_SPINCOUNT 0
+#define DATALOCK_SPINCOUNT 4096
+#define LASTLOCK_SPINCOUNT 4096
+
+void
+_MD_InitTime(void)
+{
+ /* try for CE6 GetSystemTimeAsFileTime first */
+ HANDLE h = GetModuleHandleW(L"coredll.dll");
+ ce6_GetSystemTimeAsFileTime = (GetSystemTimeAsFileTimeFcn)
+ GetProcAddressA(h, "GetSystemTimeAsFileTime");
+
+ /* otherwise go the slow route */
+ if (ce6_GetSystemTimeAsFileTime == NULL) {
+ memset(&calibration, 0, sizeof(calibration));
+ NowCalibrate();
+ InitializeCriticalSection(&calibration.calibration_lock);
+ InitializeCriticalSection(&calibration.data_lock);
+ }
+}
+
+void
+_MD_CleanupTime(void)
+{
+ if (ce6_GetSystemTimeAsFileTime == NULL) {
+ DeleteCriticalSection(&calibration.calibration_lock);
+ DeleteCriticalSection(&calibration.data_lock);
+ }
+}
+
+#define MUTEX_SETSPINCOUNT(m, c)
+
+/*
+ *-----------------------------------------------------------------------
+ *
+ * PR_Now --
+ *
+ * Returns the current time in microseconds since the epoch.
+ * The epoch is midnight January 1, 1970 GMT.
+ * The implementation is machine dependent. This is the
+ * implementation for Windows.
+ * Cf. time_t time(time_t *tp)
+ *
+ *-----------------------------------------------------------------------
+ */
+
+PR_IMPLEMENT(PRTime)
+PR_Now(void)
+{
+ long double lowresTime, highresTimerValue;
+ FILETIME ft;
+ LARGE_INTEGER now;
+ PRBool calibrated = PR_FALSE;
+ PRBool needsCalibration = PR_FALSE;
+ PRInt64 returnedTime;
+ long double cachedOffset = 0.0;
+
+ if (ce6_GetSystemTimeAsFileTime) {
+ union {
+ FILETIME ft;
+ PRTime prt;
+ } currentTime;
+
+ PR_ASSERT(sizeof(FILETIME) == sizeof(PRTime));
+
+ ce6_GetSystemTimeAsFileTime(&currentTime.ft);
+
+ /* written this way on purpose, since the second term becomes
+ * a constant, and the entire expression is faster to execute.
+ */
+ return currentTime.prt/_pr_filetime_divisor -
+ _pr_filetime_offset/_pr_filetime_divisor;
+ }
+
+ do {
+ if (!calibration.calibrated || needsCalibration) {
+ EnterCriticalSection(&calibration.calibration_lock);
+ EnterCriticalSection(&calibration.data_lock);
+
+ /* Recalibrate only if no one else did before us */
+ if (calibration.offset == cachedOffset) {
+ /*
+ * Since calibration can take a while, make any other
+ * threads immediately wait
+ */
+ MUTEX_SETSPINCOUNT(&calibration.data_lock, 0);
+
+ NowCalibrate();
+
+ calibrated = PR_TRUE;
+
+ /* Restore spin count */
+ MUTEX_SETSPINCOUNT(&calibration.data_lock, DATALOCK_SPINCOUNT);
+ }
+ LeaveCriticalSection(&calibration.data_lock);
+ LeaveCriticalSection(&calibration.calibration_lock);
+ }
+
+ /* Calculate a low resolution time */
+ LowResTime(&ft);
+ lowresTime =
+ ((long double)(FILETIME_TO_INT64(ft) - _pr_filetime_offset)) * 0.1;
+
+ if (calibration.freq > 0.0) {
+ long double highresTime, diff;
+ DWORD timeAdjustment, timeIncrement;
+ BOOL timeAdjustmentDisabled;
+
+ /* Default to 15.625 ms if the syscall fails */
+ long double skewThreshold = 15625.25;
+
+ /* Grab high resolution time */
+ QueryPerformanceCounter(&now);
+ highresTimerValue = (long double)now.QuadPart;
+
+ EnterCriticalSection(&calibration.data_lock);
+ highresTime = calibration.offset + 1000000L *
+ (highresTimerValue-calibration.timer_offset)/calibration.freq;
+ cachedOffset = calibration.offset;
+
+ /*
+ * On some dual processor/core systems, we might get an earlier
+ * time so we cache the last time that we returned.
+ */
+ calibration.last = PR_MAX(calibration.last,(PRInt64)highresTime);
+ returnedTime = calibration.last;
+ LeaveCriticalSection(&calibration.data_lock);
+
+ /* Get an estimate of clock ticks per second from our own test */
+ skewThreshold = calibration.granularity;
+ /* Check for clock skew */
+ diff = lowresTime - highresTime;
+
+ /*
+ * For some reason that I have not determined, the skew can be
+ * up to twice a kernel tick. This does not seem to happen by
+ * itself, but I have only seen it triggered by another program
+ * doing some kind of file I/O. The symptoms are a negative diff
+ * followed by an equally large positive diff.
+ */
+ if (fabs(diff) > 2*skewThreshold) {
+ if (calibrated) {
+ /*
+ * If we already calibrated once this instance, and the
+ * clock is still skewed, then either the processor(s) are
+ * wildly changing clockspeed or the system is so busy that
+ * we get switched out for long periods of time. In either
+ * case, it would be infeasible to make use of high
+ * resolution results for anything, so let's resort to old
+ * behavior for this call. It's possible that in the
+ * future, the user will want the high resolution timer, so
+ * we don't disable it entirely.
+ */
+ returnedTime = (PRInt64)lowresTime;
+ needsCalibration = PR_FALSE;
+ } else {
+ /*
+ * It is possible that when we recalibrate, we will return
+ * a value less than what we have returned before; this is
+ * unavoidable. We cannot tell the different between a
+ * faulty QueryPerformanceCounter implementation and user
+ * changes to the operating system time. Since we must
+ * respect user changes to the operating system time, we
+ * cannot maintain the invariant that Date.now() never
+ * decreases; the old implementation has this behavior as
+ * well.
+ */
+ needsCalibration = PR_TRUE;
+ }
+ } else {
+ /* No detectable clock skew */
+ returnedTime = (PRInt64)highresTime;
+ needsCalibration = PR_FALSE;
+ }
+ } else {
+ /* No high resolution timer is available, so fall back */
+ returnedTime = (PRInt64)lowresTime;
+ }
+ } while (needsCalibration);
+
+ return returnedTime;
+}
+
+#else
+
+PR_IMPLEMENT(PRTime)
+PR_Now(void)
+{
+ PRTime prt;
+ FILETIME ft;
+ SYSTEMTIME st;
+
+ GetSystemTime(&st);
+ SystemTimeToFileTime(&st, &ft);
+ _PR_FileTimeToPRTime(&ft, &prt);
+ return prt;
+}
+
+#endif
+
+/*
+ ***********************************************************************
+ ***********************************************************************
+ *
+ * Process creation routines
+ *
+ ***********************************************************************
+ ***********************************************************************
+ */
+
+/*
+ * Assemble the command line by concatenating the argv array.
+ * On success, this function returns 0 and the resulting command
+ * line is returned in *cmdLine. On failure, it returns -1.
+ */
+static int assembleCmdLine(char *const *argv, char **cmdLine)
+{
+ char *const *arg;
+ char *p, *q;
+ size_t cmdLineSize;
+ int numBackslashes;
+ int i;
+ int argNeedQuotes;
+
+ /*
+ * Find out how large the command line buffer should be.
+ */
+ cmdLineSize = 0;
+ for (arg = argv; *arg; arg++) {
+ /*
+ * \ and " need to be escaped by a \. In the worst case,
+ * every character is a \ or ", so the string of length
+ * may double. If we quote an argument, that needs two ".
+ * Finally, we need a space between arguments, and
+ * a null byte at the end of command line.
+ */
+ cmdLineSize += 2 * strlen(*arg) /* \ and " need to be escaped */
+ + 2 /* we quote every argument */
+ + 1; /* space in between, or final null */
+ }
+ p = *cmdLine = PR_MALLOC((PRUint32) cmdLineSize);
+ if (p == NULL) {
+ return -1;
+ }
+
+ for (arg = argv; *arg; arg++) {
+ /* Add a space to separates the arguments */
+ if (arg != argv) {
+ *p++ = ' ';
+ }
+ q = *arg;
+ numBackslashes = 0;
+ argNeedQuotes = 0;
+
+ /*
+ * If the argument is empty or contains white space, it needs to
+ * be quoted.
+ */
+ if (**arg == '\0' || strpbrk(*arg, " \f\n\r\t\v")) {
+ argNeedQuotes = 1;
+ }
+
+ if (argNeedQuotes) {
+ *p++ = '"';
+ }
+ while (*q) {
+ if (*q == '\\') {
+ numBackslashes++;
+ q++;
+ } else if (*q == '"') {
+ if (numBackslashes) {
+ /*
+ * Double the backslashes since they are followed
+ * by a quote
+ */
+ for (i = 0; i < 2 * numBackslashes; i++) {
+ *p++ = '\\';
+ }
+ numBackslashes = 0;
+ }
+ /* To escape the quote */
+ *p++ = '\\';
+ *p++ = *q++;
+ } else {
+ if (numBackslashes) {
+ /*
+ * Backslashes are not followed by a quote, so
+ * don't need to double the backslashes.
+ */
+ for (i = 0; i < numBackslashes; i++) {
+ *p++ = '\\';
+ }
+ numBackslashes = 0;
+ }
+ *p++ = *q++;
+ }
+ }
+
+ /* Now we are at the end of this argument */
+ if (numBackslashes) {
+ /*
+ * Double the backslashes if we have a quote string
+ * delimiter at the end.
+ */
+ if (argNeedQuotes) {
+ numBackslashes *= 2;
+ }
+ for (i = 0; i < numBackslashes; i++) {
+ *p++ = '\\';
+ }
+ }
+ if (argNeedQuotes) {
+ *p++ = '"';
+ }
+ }
+
+ *p = '\0';
+ return 0;
+}
+
+/*
+ * Assemble the environment block by concatenating the envp array
+ * (preserving the terminating null byte in each array element)
+ * and adding a null byte at the end.
+ *
+ * Returns 0 on success. The resulting environment block is returned
+ * in *envBlock. Note that if envp is NULL, a NULL pointer is returned
+ * in *envBlock. Returns -1 on failure.
+ */
+static int assembleEnvBlock(char **envp, char **envBlock)
+{
+ char *p;
+ char *q;
+ char **env;
+ char *curEnv;
+ char *cwdStart, *cwdEnd;
+ size_t envBlockSize;
+
+ if (envp == NULL) {
+ *envBlock = NULL;
+ return 0;
+ }
+
+#ifdef WINCE
+ {
+ PRUnichar *wideCurEnv = mozce_GetEnvString();
+ int len = WideCharToMultiByte(CP_ACP, 0, wideCurEnv, -1,
+ NULL, 0, NULL, NULL);
+ curEnv = (char *) PR_MALLOC(len * sizeof(char));
+ WideCharToMultiByte(CP_ACP, 0, wideCurEnv, -1,
+ curEnv, len, NULL, NULL);
+ free(wideCurEnv);
+ }
+#else
+ curEnv = GetEnvironmentStrings();
+#endif
+
+ cwdStart = curEnv;
+ while (*cwdStart) {
+ if (cwdStart[0] == '=' && cwdStart[1] != '\0'
+ && cwdStart[2] == ':' && cwdStart[3] == '=') {
+ break;
+ }
+ cwdStart += strlen(cwdStart) + 1;
+ }
+ cwdEnd = cwdStart;
+ if (*cwdEnd) {
+ cwdEnd += strlen(cwdEnd) + 1;
+ while (*cwdEnd) {
+ if (cwdEnd[0] != '=' || cwdEnd[1] == '\0'
+ || cwdEnd[2] != ':' || cwdEnd[3] != '=') {
+ break;
+ }
+ cwdEnd += strlen(cwdEnd) + 1;
+ }
+ }
+ envBlockSize = cwdEnd - cwdStart;
+
+ for (env = envp; *env; env++) {
+ envBlockSize += strlen(*env) + 1;
+ }
+ envBlockSize++;
+
+ p = *envBlock = PR_MALLOC((PRUint32) envBlockSize);
+ if (p == NULL) {
+#ifdef WINCE
+ PR_Free(curEnv);
+#else
+ FreeEnvironmentStrings(curEnv);
+#endif
+ return -1;
+ }
+
+ q = cwdStart;
+ while (q < cwdEnd) {
+ *p++ = *q++;
+ }
+#ifdef WINCE
+ PR_Free(curEnv);
+#else
+ FreeEnvironmentStrings(curEnv);
+#endif
+
+ for (env = envp; *env; env++) {
+ q = *env;
+ while (*q) {
+ *p++ = *q++;
+ }
+ *p++ = '\0';
+ }
+ *p = '\0';
+ return 0;
+}
+
+/*
+ * For qsort. We sort (case-insensitive) the environment strings
+ * before generating the environment block.
+ */
+static int compare(const void *arg1, const void *arg2)
+{
+ return _stricmp(* (char**)arg1, * (char**)arg2);
+}
+
+PRProcess * _PR_CreateWindowsProcess(
+ const char *path,
+ char *const *argv,
+ char *const *envp,
+ const PRProcessAttr *attr)
+{
+#ifdef WINCE
+ STARTUPINFOW startupInfo;
+ PRUnichar *wideCmdLine;
+ PRUnichar *wideCwd;
+ int len = 0;
+#else
+ STARTUPINFO startupInfo;
+#endif
+ DWORD creationFlags = 0;
+ PROCESS_INFORMATION procInfo;
+ BOOL retVal;
+ char *cmdLine = NULL;
+ char *envBlock = NULL;
+ char **newEnvp = NULL;
+ const char *cwd = NULL; /* current working directory */
+ PRProcess *proc = NULL;
+ PRBool hasFdInheritBuffer;
+
+ proc = PR_NEW(PRProcess);
+ if (!proc) {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ goto errorExit;
+ }
+
+ if (assembleCmdLine(argv, &cmdLine) == -1) {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ goto errorExit;
+ }
+
+#ifndef WINCE
+ /*
+ * If attr->fdInheritBuffer is not NULL, we need to insert
+ * it into the envp array, so envp cannot be NULL.
+ */
+ hasFdInheritBuffer = (attr && attr->fdInheritBuffer);
+ if ((envp == NULL) && hasFdInheritBuffer) {
+ envp = environ;
+ }
+
+ if (envp != NULL) {
+ int idx;
+ int numEnv;
+ PRBool found = PR_FALSE;
+
+ numEnv = 0;
+ while (envp[numEnv]) {
+ numEnv++;
+ }
+ newEnvp = (char **) PR_MALLOC((numEnv + 2) * sizeof(char *));
+ for (idx = 0; idx < numEnv; idx++) {
+ newEnvp[idx] = envp[idx];
+ if (hasFdInheritBuffer && !found
+ && !strncmp(newEnvp[idx], "NSPR_INHERIT_FDS=", 17)) {
+ newEnvp[idx] = attr->fdInheritBuffer;
+ found = PR_TRUE;
+ }
+ }
+ if (hasFdInheritBuffer && !found) {
+ newEnvp[idx++] = attr->fdInheritBuffer;
+ }
+ newEnvp[idx] = NULL;
+ qsort((void *) newEnvp, (size_t) idx, sizeof(char *), compare);
+ }
+ if (assembleEnvBlock(newEnvp, &envBlock) == -1) {
+ PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
+ goto errorExit;
+ }
+
+ ZeroMemory(&startupInfo, sizeof(startupInfo));
+ startupInfo.cb = sizeof(startupInfo);
+
+ if (attr) {
+ PRBool redirected = PR_FALSE;
+
+ /*
+ * XXX the default value for stdin, stdout, and stderr
+ * should probably be the console input and output, not
+ * those of the parent process.
+ */
+ startupInfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+ startupInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+ startupInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+ if (attr->stdinFd) {
+ startupInfo.hStdInput = (HANDLE) attr->stdinFd->secret->md.osfd;
+ redirected = PR_TRUE;
+ }
+ if (attr->stdoutFd) {
+ startupInfo.hStdOutput = (HANDLE) attr->stdoutFd->secret->md.osfd;
+ redirected = PR_TRUE;
+ /*
+ * If stdout is redirected, we can assume that the process will
+ * not write anything useful to the console windows, and therefore
+ * automatically set the CREATE_NO_WINDOW flag.
+ */
+ creationFlags |= CREATE_NO_WINDOW;
+ }
+ if (attr->stderrFd) {
+ startupInfo.hStdError = (HANDLE) attr->stderrFd->secret->md.osfd;
+ redirected = PR_TRUE;
+ }
+ if (redirected) {
+ startupInfo.dwFlags |= STARTF_USESTDHANDLES;
+ }
+ cwd = attr->currentDirectory;
+ }
+#endif
+
+#ifdef WINCE
+ len = MultiByteToWideChar(CP_ACP, 0, cmdLine, -1, NULL, 0);
+ wideCmdLine = (PRUnichar *)PR_MALLOC(len * sizeof(PRUnichar));
+ MultiByteToWideChar(CP_ACP, 0, cmdLine, -1, wideCmdLine, len);
+ len = MultiByteToWideChar(CP_ACP, 0, cwd, -1, NULL, 0);
+ wideCwd = PR_MALLOC(len * sizeof(PRUnichar));
+ MultiByteToWideChar(CP_ACP, 0, cwd, -1, wideCwd, len);
+ retVal = CreateProcessW(NULL,
+ wideCmdLine,
+ NULL, /* security attributes for the new
+ * process */
+ NULL, /* security attributes for the primary
+ * thread in the new process */
+ TRUE, /* inherit handles */
+ creationFlags,
+ envBlock, /* an environment block, consisting
+ * of a null-terminated block of
+ * null-terminated strings. Each
+ * string is in the form:
+ * name=value
+ * XXX: usually NULL */
+ wideCwd, /* current drive and directory */
+ &startupInfo,
+ &procInfo
+ );
+ PR_Free(wideCmdLine);
+ PR_Free(wideCwd);
+#else
+ retVal = CreateProcess(NULL,
+ cmdLine,
+ NULL, /* security attributes for the new
+ * process */
+ NULL, /* security attributes for the primary
+ * thread in the new process */
+ TRUE, /* inherit handles */
+ creationFlags,
+ envBlock, /* an environment block, consisting
+ * of a null-terminated block of
+ * null-terminated strings. Each
+ * string is in the form:
+ * name=value
+ * XXX: usually NULL */
+ cwd, /* current drive and directory */
+ &startupInfo,
+ &procInfo
+ );
+#endif
+
+ if (retVal == FALSE) {
+ /* XXX what error code? */
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ goto errorExit;
+ }
+
+ CloseHandle(procInfo.hThread);
+ proc->md.handle = procInfo.hProcess;
+ proc->md.id = procInfo.dwProcessId;
+
+ PR_DELETE(cmdLine);
+ if (newEnvp) {
+ PR_DELETE(newEnvp);
+ }
+ if (envBlock) {
+ PR_DELETE(envBlock);
+ }
+ return proc;
+
+errorExit:
+ if (cmdLine) {
+ PR_DELETE(cmdLine);
+ }
+ if (newEnvp) {
+ PR_DELETE(newEnvp);
+ }
+ if (envBlock) {
+ PR_DELETE(envBlock);
+ }
+ if (proc) {
+ PR_DELETE(proc);
+ }
+ return NULL;
+} /* _PR_CreateWindowsProcess */
+
+PRStatus _PR_DetachWindowsProcess(PRProcess *process)
+{
+ CloseHandle(process->md.handle);
+ PR_DELETE(process);
+ return PR_SUCCESS;
+}
+
+/*
+ * XXX: This implementation is a temporary quick solution.
+ * It can be called by native threads only (not by fibers).
+ */
+PRStatus _PR_WaitWindowsProcess(PRProcess *process,
+ PRInt32 *exitCode)
+{
+ DWORD dwRetVal;
+
+ dwRetVal = WaitForSingleObject(process->md.handle, INFINITE);
+ if (dwRetVal == WAIT_FAILED) {
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ return PR_FAILURE;
+ }
+ PR_ASSERT(dwRetVal == WAIT_OBJECT_0);
+ if (exitCode != NULL &&
+ GetExitCodeProcess(process->md.handle, exitCode) == FALSE) {
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ return PR_FAILURE;
+ }
+ CloseHandle(process->md.handle);
+ PR_DELETE(process);
+ return PR_SUCCESS;
+}
+
+PRStatus _PR_KillWindowsProcess(PRProcess *process)
+{
+ /*
+ * On Unix, if a process terminates normally, its exit code is
+ * between 0 and 255. So here on Windows, we use the exit code
+ * 256 to indicate that the process is killed.
+ */
+ if (TerminateProcess(process->md.handle, 256)) {
+ return PR_SUCCESS;
+ }
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ return PR_FAILURE;
+}
+
+PRStatus _MD_WindowsGetHostName(char *name, PRUint32 namelen)
+{
+ PRIntn rv;
+ PRInt32 syserror;
+
+ rv = gethostname(name, (PRInt32) namelen);
+ if (0 == rv) {
+ return PR_SUCCESS;
+ }
+ syserror = WSAGetLastError();
+ PR_ASSERT(WSANOTINITIALISED != syserror);
+ _PR_MD_MAP_GETHOSTNAME_ERROR(syserror);
+ return PR_FAILURE;
+}
+
+PRStatus _MD_WindowsGetSysInfo(PRSysInfo cmd, char *name, PRUint32 namelen)
+{
+ OSVERSIONINFO osvi;
+
+ PR_ASSERT((cmd == PR_SI_SYSNAME) || (cmd == PR_SI_RELEASE));
+
+ ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
+ osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+
+ if (! GetVersionEx (&osvi) ) {
+ _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+ return PR_FAILURE;
+ }
+
+ switch (osvi.dwPlatformId) {
+ case VER_PLATFORM_WIN32_NT:
+ if (PR_SI_SYSNAME == cmd)
+ (void)PR_snprintf(name, namelen, "Windows_NT");
+ else if (PR_SI_RELEASE == cmd)
+ (void)PR_snprintf(name, namelen, "%d.%d",osvi.dwMajorVersion,
+ osvi.dwMinorVersion);
+ break;
+ case VER_PLATFORM_WIN32_WINDOWS:
+ if (PR_SI_SYSNAME == cmd) {
+ if ((osvi.dwMajorVersion > 4) ||
+ ((osvi.dwMajorVersion == 4) && (osvi.dwMinorVersion > 0)))
+ (void)PR_snprintf(name, namelen, "Windows_98");
+ else
+ (void)PR_snprintf(name, namelen, "Windows_95");
+ } else if (PR_SI_RELEASE == cmd) {
+ (void)PR_snprintf(name, namelen, "%d.%d",osvi.dwMajorVersion,
+ osvi.dwMinorVersion);
+ }
+ break;
+#ifdef VER_PLATFORM_WIN32_CE
+ case VER_PLATFORM_WIN32_CE:
+ if (PR_SI_SYSNAME == cmd)
+ (void)PR_snprintf(name, namelen, "Windows_CE");
+ else if (PR_SI_RELEASE == cmd)
+ (void)PR_snprintf(name, namelen, "%d.%d",osvi.dwMajorVersion,
+ osvi.dwMinorVersion);
+ break;
+#endif
+ default:
+ if (PR_SI_SYSNAME == cmd)
+ (void)PR_snprintf(name, namelen, "Windows_Unknown");
+ else if (PR_SI_RELEASE == cmd)
+ (void)PR_snprintf(name, namelen, "%d.%d",0,0);
+ break;
+ }
+ return PR_SUCCESS;
+}
+
+PRStatus _MD_WindowsGetReleaseName(char *name, PRUint32 namelen)
+{
+ OSVERSIONINFO osvi;
+
+ ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
+ osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
+
+ if (! GetVersionEx (&osvi) ) {
+ _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+ return PR_FAILURE;
+ }
+
+ switch (osvi.dwPlatformId) {
+ case VER_PLATFORM_WIN32_NT:
+ case VER_PLATFORM_WIN32_WINDOWS:
+ (void)PR_snprintf(name, namelen, "%d.%d",osvi.dwMajorVersion,
+ osvi.dwMinorVersion);
+ break;
+ default:
+ (void)PR_snprintf(name, namelen, "%d.%d",0,0);
+ break;
+ }
+ return PR_SUCCESS;
+}
+
+/*
+ **********************************************************************
+ *
+ * Memory-mapped files
+ *
+ **********************************************************************
+ */
+
+PRStatus _MD_CreateFileMap(PRFileMap *fmap, PRInt64 size)
+{
+ DWORD dwHi, dwLo;
+ DWORD flProtect;
+ PROsfd osfd;
+
+ osfd = ( fmap->fd == (PRFileDesc*)-1 )? -1 : fmap->fd->secret->md.osfd;
+
+ dwLo = (DWORD) (size & 0xffffffff);
+ dwHi = (DWORD) (((PRUint64) size >> 32) & 0xffffffff);
+
+ if (fmap->prot == PR_PROT_READONLY) {
+ flProtect = PAGE_READONLY;
+ fmap->md.dwAccess = FILE_MAP_READ;
+ } else if (fmap->prot == PR_PROT_READWRITE) {
+ flProtect = PAGE_READWRITE;
+ fmap->md.dwAccess = FILE_MAP_WRITE;
+ } else {
+ PR_ASSERT(fmap->prot == PR_PROT_WRITECOPY);
+#ifdef WINCE
+ /* WINCE does not have FILE_MAP_COPY. */
+ PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+ return PR_FAILURE;
+#else
+ flProtect = PAGE_WRITECOPY;
+ fmap->md.dwAccess = FILE_MAP_COPY;
+#endif
+ }
+
+ fmap->md.hFileMap = CreateFileMapping(
+ (HANDLE) osfd,
+ NULL,
+ flProtect,
+ dwHi,
+ dwLo,
+ NULL);
+
+ if (fmap->md.hFileMap == NULL) {
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ return PR_FAILURE;
+ }
+ return PR_SUCCESS;
+}
+
+PRInt32 _MD_GetMemMapAlignment(void)
+{
+ SYSTEM_INFO info;
+ GetSystemInfo(&info);
+ return info.dwAllocationGranularity;
+}
+
+extern PRLogModuleInfo *_pr_shma_lm;
+
+void * _MD_MemMap(
+ PRFileMap *fmap,
+ PROffset64 offset,
+ PRUint32 len)
+{
+ DWORD dwHi, dwLo;
+ void *addr;
+
+ dwLo = (DWORD) (offset & 0xffffffff);
+ dwHi = (DWORD) (((PRUint64) offset >> 32) & 0xffffffff);
+ if ((addr = MapViewOfFile(fmap->md.hFileMap, fmap->md.dwAccess,
+ dwHi, dwLo, len)) == NULL) {
+ {
+ LPVOID lpMsgBuf;
+
+ FormatMessage(
+ FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL,
+ GetLastError(),
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+ (LPTSTR) &lpMsgBuf,
+ 0,
+ NULL
+ );
+ PR_LOG( _pr_shma_lm, PR_LOG_DEBUG, ("md_memmap(): %s", lpMsgBuf ));
+ }
+ PR_SetError(PR_UNKNOWN_ERROR, GetLastError());
+ }
+ return addr;
+}
+
+PRStatus _MD_MemUnmap(void *addr, PRUint32 len)
+{
+ if (UnmapViewOfFile(addr)) {
+ return PR_SUCCESS;
+ }
+ _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+ return PR_FAILURE;
+}
+
+PRStatus _MD_CloseFileMap(PRFileMap *fmap)
+{
+ CloseHandle(fmap->md.hFileMap);
+ PR_DELETE(fmap);
+ return PR_SUCCESS;
+}
+
+PRStatus _MD_SyncMemMap(
+ PRFileDesc *fd,
+ void *addr,
+ PRUint32 len)
+{
+ PROsfd osfd = fd->secret->md.osfd;
+
+ /* The FlushViewOfFile page on MSDN says:
+ * To flush all the dirty pages plus the metadata for the file and
+ * ensure that they are physically written to disk, call
+ * FlushViewOfFile and then call the FlushFileBuffers function.
+ */
+ if (FlushViewOfFile(addr, len) && FlushFileBuffers((HANDLE) osfd)) {
+ return PR_SUCCESS;
+ }
+ _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+ return PR_FAILURE;
+}
+
+/*
+ ***********************************************************************
+ *
+ * Atomic increment and decrement operations for x86 processors
+ *
+ * We don't use InterlockedIncrement and InterlockedDecrement
+ * because on NT 3.51 and Win95, they return a number with
+ * the same sign as the incremented/decremented result, rather
+ * than the result itself. On NT 4.0 these functions do return
+ * the incremented/decremented result.
+ *
+ * The result is returned in the eax register by the inline
+ * assembly code. We disable the harmless "no return value"
+ * warning (4035) for these two functions.
+ *
+ ***********************************************************************
+ */
+
+#if defined(_M_IX86) || defined(_X86_)
+
+#pragma warning(disable: 4035)
+PRInt32 _PR_MD_ATOMIC_INCREMENT(PRInt32 *val)
+{
+#if defined(__GNUC__)
+ PRInt32 result;
+ asm volatile ("lock ; xadd %0, %1"
+ : "=r"(result), "=m"(*val)
+ : "0"(1), "m"(*val));
+ return result + 1;
+#else
+ __asm
+ {
+ mov ecx, val
+ mov eax, 1
+ lock xadd dword ptr [ecx], eax
+ inc eax
+ }
+#endif /* __GNUC__ */
+}
+#pragma warning(default: 4035)
+
+#pragma warning(disable: 4035)
+PRInt32 _PR_MD_ATOMIC_DECREMENT(PRInt32 *val)
+{
+#if defined(__GNUC__)
+ PRInt32 result;
+ asm volatile ("lock ; xadd %0, %1"
+ : "=r"(result), "=m"(*val)
+ : "0"(-1), "m"(*val));
+ //asm volatile("lock ; xadd %0, %1" : "=m" (val), "=a" (result) : "-1" (1));
+ return result - 1;
+#else
+ __asm
+ {
+ mov ecx, val
+ mov eax, 0ffffffffh
+ lock xadd dword ptr [ecx], eax
+ dec eax
+ }
+#endif /* __GNUC__ */
+}
+#pragma warning(default: 4035)
+
+#pragma warning(disable: 4035)
+PRInt32 _PR_MD_ATOMIC_ADD(PRInt32 *intp, PRInt32 val)
+{
+#if defined(__GNUC__)
+ PRInt32 result;
+ //asm volatile("lock ; xadd %1, %0" : "=m" (intp), "=a" (result) : "1" (val));
+ asm volatile ("lock ; xadd %0, %1"
+ : "=r"(result), "=m"(*intp)
+ : "0"(val), "m"(*intp));
+ return result + val;
+#else
+ __asm
+ {
+ mov ecx, intp
+ mov eax, val
+ mov edx, eax
+ lock xadd dword ptr [ecx], eax
+ add eax, edx
+ }
+#endif /* __GNUC__ */
+}
+#pragma warning(default: 4035)
+
+#ifdef _PR_HAVE_ATOMIC_CAS
+
+#pragma warning(disable: 4035)
+void
+PR_StackPush(PRStack *stack, PRStackElem *stack_elem)
+{
+#if defined(__GNUC__)
+ void **tos = (void **) stack;
+ void *tmp;
+
+ retry:
+ if (*tos == (void *) -1)
+ goto retry;
+
+ __asm__("xchg %0,%1"
+ : "=r" (tmp), "=m"(*tos)
+ : "0" (-1), "m"(*tos));
+
+ if (tmp == (void *) -1)
+ goto retry;
+
+ *(void **)stack_elem = tmp;
+ __asm__("" : : : "memory");
+ *tos = stack_elem;
+#else
+ __asm
+ {
+ mov ebx, stack
+ mov ecx, stack_elem
+retry: mov eax,[ebx]
+ cmp eax,-1
+ je retry
+ mov eax,-1
+ xchg dword ptr [ebx], eax
+ cmp eax,-1
+ je retry
+ mov [ecx],eax
+ mov [ebx],ecx
+ }
+#endif /* __GNUC__ */
+}
+#pragma warning(default: 4035)
+
+#pragma warning(disable: 4035)
+PRStackElem *
+PR_StackPop(PRStack *stack)
+{
+#if defined(__GNUC__)
+ void **tos = (void **) stack;
+ void *tmp;
+
+ retry:
+ if (*tos == (void *) -1)
+ goto retry;
+
+ __asm__("xchg %0,%1"
+ : "=r" (tmp), "=m"(*tos)
+ : "0" (-1), "m"(*tos));
+
+ if (tmp == (void *) -1)
+ goto retry;
+
+ if (tmp != (void *) 0)
+ {
+ void *next = *(void **)tmp;
+ *tos = next;
+ *(void **)tmp = 0;
+ }
+ else
+ *tos = tmp;
+
+ return tmp;
+#else
+ __asm
+ {
+ mov ebx, stack
+retry: mov eax,[ebx]
+ cmp eax,-1
+ je retry
+ mov eax,-1
+ xchg dword ptr [ebx], eax
+ cmp eax,-1
+ je retry
+ cmp eax,0
+ je empty
+ mov ecx,[eax]
+ mov [ebx],ecx
+ mov [eax],0
+ jmp done
+empty:
+ mov [ebx],eax
+done:
+ }
+#endif /* __GNUC__ */
+}
+#pragma warning(default: 4035)
+
+#endif /* _PR_HAVE_ATOMIC_CAS */
+
+#endif /* x86 processors */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 07:51:30 +0000