mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-11 02:10:17 +01:00
641 lines
16 KiB
C
641 lines
16 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "seccomon.h"
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/* This ifdef should match the one in sslsnce.c */
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#if defined(XP_UNIX) || defined(XP_WIN32) || defined (XP_OS2) || defined(XP_BEOS)
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#include "sslmutex.h"
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#include "prerr.h"
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static SECStatus single_process_sslMutex_Init(sslMutex* pMutex)
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{
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PR_ASSERT(pMutex != 0 && pMutex->u.sslLock == 0 );
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pMutex->u.sslLock = PR_NewLock();
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if (!pMutex->u.sslLock) {
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return SECFailure;
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}
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return SECSuccess;
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}
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static SECStatus single_process_sslMutex_Destroy(sslMutex* pMutex)
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{
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PR_ASSERT(pMutex != 0);
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PR_ASSERT(pMutex->u.sslLock!= 0);
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if (!pMutex->u.sslLock) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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PR_DestroyLock(pMutex->u.sslLock);
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return SECSuccess;
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}
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static SECStatus single_process_sslMutex_Unlock(sslMutex* pMutex)
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{
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PR_ASSERT(pMutex != 0 );
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PR_ASSERT(pMutex->u.sslLock !=0);
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if (!pMutex->u.sslLock) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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PR_Unlock(pMutex->u.sslLock);
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return SECSuccess;
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}
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static SECStatus single_process_sslMutex_Lock(sslMutex* pMutex)
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{
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PR_ASSERT(pMutex != 0);
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PR_ASSERT(pMutex->u.sslLock != 0 );
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if (!pMutex->u.sslLock) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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PR_Lock(pMutex->u.sslLock);
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return SECSuccess;
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}
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#if defined(LINUX) || defined(AIX) || defined(BEOS) || defined(BSDI) || (defined(NETBSD) && __NetBSD_Version__ < 500000000) || defined(OPENBSD)
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include "unix_err.h"
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#include "pratom.h"
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#define SSL_MUTEX_MAGIC 0xfeedfd
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#define NONBLOCKING_POSTS 1 /* maybe this is faster */
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#if NONBLOCKING_POSTS
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#ifndef FNONBLOCK
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#define FNONBLOCK O_NONBLOCK
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#endif
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static int
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setNonBlocking(int fd, int nonBlocking)
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{
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int flags;
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int err;
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flags = fcntl(fd, F_GETFL, 0);
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if (0 > flags)
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return flags;
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if (nonBlocking)
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flags |= FNONBLOCK;
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else
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flags &= ~FNONBLOCK;
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err = fcntl(fd, F_SETFL, flags);
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return err;
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}
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#endif
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SECStatus
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sslMutex_Init(sslMutex *pMutex, int shared)
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{
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int err;
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PR_ASSERT(pMutex);
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pMutex->isMultiProcess = (PRBool)(shared != 0);
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if (!shared) {
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return single_process_sslMutex_Init(pMutex);
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}
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pMutex->u.pipeStr.mPipes[0] = -1;
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pMutex->u.pipeStr.mPipes[1] = -1;
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pMutex->u.pipeStr.mPipes[2] = -1;
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pMutex->u.pipeStr.nWaiters = 0;
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err = pipe(pMutex->u.pipeStr.mPipes);
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if (err) {
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nss_MD_unix_map_default_error(errno);
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return err;
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}
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#if NONBLOCKING_POSTS
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err = setNonBlocking(pMutex->u.pipeStr.mPipes[1], 1);
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if (err)
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goto loser;
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#endif
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pMutex->u.pipeStr.mPipes[2] = SSL_MUTEX_MAGIC;
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#if defined(LINUX) && defined(i386)
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/* Pipe starts out empty */
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return SECSuccess;
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#else
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/* Pipe starts with one byte. */
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return sslMutex_Unlock(pMutex);
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#endif
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loser:
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nss_MD_unix_map_default_error(errno);
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close(pMutex->u.pipeStr.mPipes[0]);
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close(pMutex->u.pipeStr.mPipes[1]);
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return SECFailure;
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}
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SECStatus
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sslMutex_Destroy(sslMutex *pMutex, PRBool processLocal)
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{
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Destroy(pMutex);
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}
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if (pMutex->u.pipeStr.mPipes[2] != SSL_MUTEX_MAGIC) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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close(pMutex->u.pipeStr.mPipes[0]);
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close(pMutex->u.pipeStr.mPipes[1]);
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if (processLocal) {
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return SECSuccess;
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}
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pMutex->u.pipeStr.mPipes[0] = -1;
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pMutex->u.pipeStr.mPipes[1] = -1;
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pMutex->u.pipeStr.mPipes[2] = -1;
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pMutex->u.pipeStr.nWaiters = 0;
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return SECSuccess;
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}
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#if defined(LINUX) && defined(i386)
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/* No memory barrier needed for this platform */
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/* nWaiters includes the holder of the lock (if any) and the number
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** threads waiting for it. After incrementing nWaiters, if the count
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** is exactly 1, then you have the lock and may proceed. If the
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** count is greater than 1, then you must wait on the pipe.
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*/
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SECStatus
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sslMutex_Unlock(sslMutex *pMutex)
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{
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PRInt32 newValue;
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Unlock(pMutex);
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}
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if (pMutex->u.pipeStr.mPipes[2] != SSL_MUTEX_MAGIC) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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/* Do Memory Barrier here. */
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newValue = PR_ATOMIC_DECREMENT(&pMutex->u.pipeStr.nWaiters);
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if (newValue > 0) {
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int cc;
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char c = 1;
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do {
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cc = write(pMutex->u.pipeStr.mPipes[1], &c, 1);
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} while (cc < 0 && (errno == EINTR || errno == EAGAIN));
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if (cc != 1) {
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if (cc < 0)
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nss_MD_unix_map_default_error(errno);
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else
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PORT_SetError(PR_UNKNOWN_ERROR);
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return SECFailure;
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}
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}
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return SECSuccess;
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}
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SECStatus
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sslMutex_Lock(sslMutex *pMutex)
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{
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PRInt32 newValue;
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Lock(pMutex);
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}
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if (pMutex->u.pipeStr.mPipes[2] != SSL_MUTEX_MAGIC) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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newValue = PR_ATOMIC_INCREMENT(&pMutex->u.pipeStr.nWaiters);
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/* Do Memory Barrier here. */
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if (newValue > 1) {
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int cc;
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char c;
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do {
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cc = read(pMutex->u.pipeStr.mPipes[0], &c, 1);
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} while (cc < 0 && errno == EINTR);
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if (cc != 1) {
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if (cc < 0)
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nss_MD_unix_map_default_error(errno);
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else
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PORT_SetError(PR_UNKNOWN_ERROR);
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return SECFailure;
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}
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}
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return SECSuccess;
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}
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#else
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/* Using Atomic operations requires the use of a memory barrier instruction
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** on PowerPC, Sparc, and Alpha. NSPR's PR_Atomic functions do not perform
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** them, and NSPR does not provide a function that does them (e.g. PR_Barrier).
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** So, we don't use them on those platforms.
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*/
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SECStatus
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sslMutex_Unlock(sslMutex *pMutex)
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{
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int cc;
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char c = 1;
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Unlock(pMutex);
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}
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if (pMutex->u.pipeStr.mPipes[2] != SSL_MUTEX_MAGIC) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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do {
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cc = write(pMutex->u.pipeStr.mPipes[1], &c, 1);
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} while (cc < 0 && (errno == EINTR || errno == EAGAIN));
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if (cc != 1) {
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if (cc < 0)
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nss_MD_unix_map_default_error(errno);
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else
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PORT_SetError(PR_UNKNOWN_ERROR);
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return SECFailure;
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}
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return SECSuccess;
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}
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SECStatus
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sslMutex_Lock(sslMutex *pMutex)
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{
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int cc;
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char c;
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Lock(pMutex);
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}
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if (pMutex->u.pipeStr.mPipes[2] != SSL_MUTEX_MAGIC) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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do {
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cc = read(pMutex->u.pipeStr.mPipes[0], &c, 1);
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} while (cc < 0 && errno == EINTR);
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if (cc != 1) {
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if (cc < 0)
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nss_MD_unix_map_default_error(errno);
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else
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PORT_SetError(PR_UNKNOWN_ERROR);
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return SECFailure;
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}
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return SECSuccess;
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}
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#endif
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#elif defined(WIN32)
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#include "win32err.h"
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/* on Windows, we need to find the optimal type of locking mechanism to use
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for the sslMutex.
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There are 3 cases :
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1) single-process, use a PRLock, as for all other platforms
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2) Win95 multi-process, use a Win32 mutex
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3) on WINNT multi-process, use a PRLock + a Win32 mutex
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*/
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#ifdef WINNT
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SECStatus sslMutex_2LevelInit(sslMutex *sem)
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{
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/* the following adds a PRLock to sslMutex . This is done in each
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process of a multi-process server and is only needed on WINNT, if
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using fibers. We can't tell if native threads or fibers are used, so
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we always do it on WINNT
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*/
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PR_ASSERT(sem);
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if (sem) {
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/* we need to reset the sslLock in the children or the single_process init
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function below will assert */
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sem->u.sslLock = NULL;
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}
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return single_process_sslMutex_Init(sem);
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}
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static SECStatus sslMutex_2LevelDestroy(sslMutex *sem)
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{
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return single_process_sslMutex_Destroy(sem);
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}
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#endif
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SECStatus
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sslMutex_Init(sslMutex *pMutex, int shared)
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{
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#ifdef WINNT
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SECStatus retvalue;
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#endif
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HANDLE hMutex;
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SECURITY_ATTRIBUTES attributes =
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{ sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
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PR_ASSERT(pMutex != 0 && (pMutex->u.sslMutx == 0 ||
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pMutex->u.sslMutx == INVALID_HANDLE_VALUE) );
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pMutex->isMultiProcess = (PRBool)(shared != 0);
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Init(pMutex);
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}
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#ifdef WINNT
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/* we need a lock on WINNT for fibers in the parent process */
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retvalue = sslMutex_2LevelInit(pMutex);
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if (SECSuccess != retvalue)
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return SECFailure;
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#endif
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if (!pMutex || ((hMutex = pMutex->u.sslMutx) != 0 &&
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hMutex != INVALID_HANDLE_VALUE)) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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attributes.bInheritHandle = (shared ? TRUE : FALSE);
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hMutex = CreateMutex(&attributes, FALSE, NULL);
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if (hMutex == NULL) {
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hMutex = INVALID_HANDLE_VALUE;
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nss_MD_win32_map_default_error(GetLastError());
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return SECFailure;
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}
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pMutex->u.sslMutx = hMutex;
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return SECSuccess;
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}
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SECStatus
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sslMutex_Destroy(sslMutex *pMutex, PRBool processLocal)
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{
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HANDLE hMutex;
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int rv;
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int retvalue = SECSuccess;
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PR_ASSERT(pMutex != 0);
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Destroy(pMutex);
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}
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/* multi-process mode */
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#ifdef WINNT
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/* on NT, get rid of the PRLock used for fibers within a process */
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retvalue = sslMutex_2LevelDestroy(pMutex);
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#endif
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PR_ASSERT( pMutex->u.sslMutx != 0 &&
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pMutex->u.sslMutx != INVALID_HANDLE_VALUE);
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if (!pMutex || (hMutex = pMutex->u.sslMutx) == 0
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|| hMutex == INVALID_HANDLE_VALUE) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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rv = CloseHandle(hMutex); /* ignore error */
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if (!processLocal && rv) {
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pMutex->u.sslMutx = hMutex = INVALID_HANDLE_VALUE;
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}
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if (!rv) {
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nss_MD_win32_map_default_error(GetLastError());
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retvalue = SECFailure;
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}
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return retvalue;
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}
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int
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sslMutex_Unlock(sslMutex *pMutex)
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{
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BOOL success = FALSE;
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HANDLE hMutex;
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PR_ASSERT(pMutex != 0 );
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Unlock(pMutex);
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}
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PR_ASSERT(pMutex->u.sslMutx != 0 &&
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pMutex->u.sslMutx != INVALID_HANDLE_VALUE);
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if (!pMutex || (hMutex = pMutex->u.sslMutx) == 0 ||
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hMutex == INVALID_HANDLE_VALUE) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure;
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}
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success = ReleaseMutex(hMutex);
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if (!success) {
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nss_MD_win32_map_default_error(GetLastError());
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return SECFailure;
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}
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#ifdef WINNT
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return single_process_sslMutex_Unlock(pMutex);
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/* release PRLock for other fibers in the process */
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#else
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return SECSuccess;
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#endif
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}
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int
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sslMutex_Lock(sslMutex *pMutex)
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{
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HANDLE hMutex;
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DWORD event;
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DWORD lastError;
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SECStatus rv;
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SECStatus retvalue = SECSuccess;
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PR_ASSERT(pMutex != 0);
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if (PR_FALSE == pMutex->isMultiProcess) {
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return single_process_sslMutex_Lock(pMutex);
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}
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#ifdef WINNT
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/* lock first to preserve from other threads/fibers
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in the same process */
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retvalue = single_process_sslMutex_Lock(pMutex);
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#endif
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PR_ASSERT(pMutex->u.sslMutx != 0 &&
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pMutex->u.sslMutx != INVALID_HANDLE_VALUE);
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if (!pMutex || (hMutex = pMutex->u.sslMutx) == 0 ||
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hMutex == INVALID_HANDLE_VALUE) {
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PORT_SetError(PR_INVALID_ARGUMENT_ERROR);
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return SECFailure; /* what else ? */
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}
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/* acquire the mutex to be the only owner accross all other processes */
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event = WaitForSingleObject(hMutex, INFINITE);
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switch (event) {
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case WAIT_OBJECT_0:
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case WAIT_ABANDONED:
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rv = SECSuccess;
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break;
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case WAIT_TIMEOUT:
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#if defined(WAIT_IO_COMPLETION)
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case WAIT_IO_COMPLETION:
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#endif
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default: /* should never happen. nothing we can do. */
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PR_ASSERT(!("WaitForSingleObject returned invalid value."));
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PORT_SetError(PR_UNKNOWN_ERROR);
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rv = SECFailure;
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break;
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case WAIT_FAILED: /* failure returns this */
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rv = SECFailure;
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lastError = GetLastError(); /* for debugging */
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nss_MD_win32_map_default_error(lastError);
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break;
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}
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if (! (SECSuccess == retvalue && SECSuccess == rv)) {
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return SECFailure;
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}
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return SECSuccess;
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}
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#elif defined(XP_UNIX)
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#include <errno.h>
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#include "unix_err.h"
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SECStatus
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sslMutex_Init(sslMutex *pMutex, int shared)
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{
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int rv;
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PR_ASSERT(pMutex);
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pMutex->isMultiProcess = (PRBool)(shared != 0);
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if (!shared) {
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return single_process_sslMutex_Init(pMutex);
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}
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do {
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rv = sem_init(&pMutex->u.sem, shared, 1);
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} while (rv < 0 && errno == EINTR);
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if (rv < 0) {
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nss_MD_unix_map_default_error(errno);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Destroy(sslMutex *pMutex, PRBool processLocal)
|
|
{
|
|
int rv;
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Destroy(pMutex);
|
|
}
|
|
|
|
/* semaphores are global resources. See SEM_DESTROY(3) man page */
|
|
if (processLocal) {
|
|
return SECSuccess;
|
|
}
|
|
do {
|
|
rv = sem_destroy(&pMutex->u.sem);
|
|
} while (rv < 0 && errno == EINTR);
|
|
if (rv < 0) {
|
|
nss_MD_unix_map_default_error(errno);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Unlock(sslMutex *pMutex)
|
|
{
|
|
int rv;
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Unlock(pMutex);
|
|
}
|
|
do {
|
|
rv = sem_post(&pMutex->u.sem);
|
|
} while (rv < 0 && errno == EINTR);
|
|
if (rv < 0) {
|
|
nss_MD_unix_map_default_error(errno);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Lock(sslMutex *pMutex)
|
|
{
|
|
int rv;
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Lock(pMutex);
|
|
}
|
|
do {
|
|
rv = sem_wait(&pMutex->u.sem);
|
|
} while (rv < 0 && errno == EINTR);
|
|
if (rv < 0) {
|
|
nss_MD_unix_map_default_error(errno);
|
|
return SECFailure;
|
|
}
|
|
return SECSuccess;
|
|
}
|
|
|
|
#else
|
|
|
|
SECStatus
|
|
sslMutex_Init(sslMutex *pMutex, int shared)
|
|
{
|
|
PR_ASSERT(pMutex);
|
|
pMutex->isMultiProcess = (PRBool)(shared != 0);
|
|
if (!shared) {
|
|
return single_process_sslMutex_Init(pMutex);
|
|
}
|
|
PORT_Assert(!("sslMutex_Init not implemented for multi-process applications !"));
|
|
PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
|
|
return SECFailure;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Destroy(sslMutex *pMutex, PRBool processLocal)
|
|
{
|
|
PR_ASSERT(pMutex);
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Destroy(pMutex);
|
|
}
|
|
PORT_Assert(!("sslMutex_Destroy not implemented for multi-process applications !"));
|
|
PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
|
|
return SECFailure;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Unlock(sslMutex *pMutex)
|
|
{
|
|
PR_ASSERT(pMutex);
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Unlock(pMutex);
|
|
}
|
|
PORT_Assert(!("sslMutex_Unlock not implemented for multi-process applications !"));
|
|
PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
|
|
return SECFailure;
|
|
}
|
|
|
|
SECStatus
|
|
sslMutex_Lock(sslMutex *pMutex)
|
|
{
|
|
PR_ASSERT(pMutex);
|
|
if (PR_FALSE == pMutex->isMultiProcess) {
|
|
return single_process_sslMutex_Lock(pMutex);
|
|
}
|
|
PORT_Assert(!("sslMutex_Lock not implemented for multi-process applications !"));
|
|
PORT_SetError(PR_NOT_IMPLEMENTED_ERROR);
|
|
return SECFailure;
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif
|