mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-09-21 20:40:13 +02:00
44b7f056d9
bug1001332, 56b691c003ad, bug1086145, bug1054069, bug1155922, bug991783, bug1125025, bug1162521, bug1162644, bug1132941, bug1164364, bug1166205, bug1166163, bug1166515, bug1138554, bug1167046, bug1167043, bug1169451, bug1172128, bug1170322, bug102794, bug1128184, bug557830, bug1174648, bug1180244, bug1177784, bug1173413, bug1169174, bug1084669, bug951455, bug1183395, bug1177430, bug1183827, bug1160139, bug1154106, bug1142209, bug1185033, bug1193467, bug1182667(with sha512 changes backed out, which breaks VC6 compilation), bug1158489, bug337796
131 lines
3.3 KiB
C
131 lines
3.3 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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#ifndef __SSLMUTEX_H_
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#define __SSLMUTEX_H_ 1
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/* What SSL really wants is portable process-shared unnamed mutexes in
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* shared memory, that have the property that if the process that holds
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* them dies, they are released automatically, and that (unlike fcntl
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* record locking) lock to the thread, not to the process.
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* NSPR doesn't provide that.
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* Windows has mutexes that meet that description, but they're not portable.
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* POSIX mutexes are not automatically released when the holder dies,
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* and other processes/threads cannot release the mutex on behalf of the
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* dead holder.
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* POSIX semaphores can be used to accomplish this on systems that implement
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* process-shared unnamed POSIX semaphores, because a watchdog thread can
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* discover and release semaphores that were held by a dead process.
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* On systems that do not support process-shared POSIX unnamed semaphores,
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* they can be emulated using pipes.
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* The performance cost of doing that is not yet measured.
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*
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* So, this API looks a lot like POSIX pthread mutexes.
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*/
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#include "prtypes.h"
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#include "prlock.h"
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#if defined(NETBSD)
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#include <sys/param.h> /* for __NetBSD_Version__ */
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#endif
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#if defined(WIN32)
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#include <wtypes.h>
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typedef struct
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{
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PRBool isMultiProcess;
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#ifdef WINNT
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/* on WINNT we need both the PRLock and the Win32 mutex for fibers */
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struct {
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#else
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union {
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#endif
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PRLock* sslLock;
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HANDLE sslMutx;
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} u;
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} sslMutex;
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typedef int sslPID;
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#elif defined(LINUX) || defined(AIX) || defined(BEOS) || defined(BSDI) || (defined(NETBSD) && __NetBSD_Version__ < 500000000) || defined(OPENBSD)
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#include <sys/types.h>
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#include "prtypes.h"
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typedef struct {
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PRBool isMultiProcess;
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union {
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PRLock* sslLock;
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struct {
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int mPipes[3];
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PRInt32 nWaiters;
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} pipeStr;
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} u;
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} sslMutex;
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typedef pid_t sslPID;
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/* other types of unix, except OS X */
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#elif defined(XP_UNIX) && !defined(DARWIN)
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#include <sys/types.h> /* for pid_t */
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#include <semaphore.h> /* for sem_t, and sem_* functions */
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typedef struct
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{
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PRBool isMultiProcess;
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union {
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PRLock* sslLock;
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sem_t sem;
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} u;
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} sslMutex;
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typedef pid_t sslPID;
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#else /* no support for cross-process locking */
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/* what platform is this ?? */
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typedef struct {
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PRBool isMultiProcess;
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union {
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PRLock* sslLock;
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/* include cross-process locking mechanism here */
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} u;
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} sslMutex;
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#ifdef DARWIN
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typedef pid_t sslPID;
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#else
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typedef int sslPID;
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#endif
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#endif
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#include "seccomon.h"
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SEC_BEGIN_PROTOS
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extern SECStatus sslMutex_Init(sslMutex *sem, int shared);
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/* If processLocal is set to true, then just free resources which are *only* associated
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* with the current process. Leave any shared resources (including the state of
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* shared memory) intact. */
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extern SECStatus sslMutex_Destroy(sslMutex *sem, PRBool processLocal);
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extern SECStatus sslMutex_Unlock(sslMutex *sem);
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extern SECStatus sslMutex_Lock(sslMutex *sem);
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#ifdef WINNT
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extern SECStatus sslMutex_2LevelInit(sslMutex *sem);
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#endif
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SEC_END_PROTOS
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#endif
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