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Diffstat (limited to 'pr/src/md/windows/ntmisc.c')
| -rw-r--r-- | pr/src/md/windows/ntmisc.c | 1215 |
1 files changed, 1215 insertions, 0 deletions
diff --git a/pr/src/md/windows/ntmisc.c b/pr/src/md/windows/ntmisc.c new file mode 100644 index 0000000..9991c95 --- /dev/null +++ b/pr/src/md/windows/ntmisc.c @@ -0,0 +1,1215 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is the Netscape Portable Runtime (NSPR). + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-2000 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either the GNU General Public License Version 2 or later (the "GPL"), or + * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +/* + * 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(¤tTime.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; + } else { + PR_SetError(PR_UNKNOWN_ERROR, GetLastError()); + return PR_FAILURE; + } +} + +PRStatus _MD_CloseFileMap(PRFileMap *fmap) +{ + CloseHandle(fmap->md.hFileMap); + PR_DELETE(fmap); + return PR_SUCCESS; +} + +/* + *********************************************************************** + * + * 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 */ |