diff options
| -rw-r--r-- | unix/tclUnixThrd.c | 51 | ||||
| -rw-r--r-- | win/tclWinThrd.c | 37 |
2 files changed, 10 insertions, 78 deletions
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c index ae81c5f..0e8070d 100644 --- a/unix/tclUnixThrd.c +++ b/unix/tclUnixThrd.c @@ -22,19 +22,6 @@ typedef struct ThreadSpecificData { static Tcl_ThreadDataKey dataKey; /* - * This is the number of milliseconds to wait between internal retries in - * the Tcl_MutexLock function. This value must be greater than zero and - * should be a suitable value for the given platform. - * - * TODO: This may need to be dynamically determined, based on the relative - * performance of the running process. - */ - -#ifndef TCL_MUTEX_LOCK_SLEEP_TIME -# define TCL_MUTEX_LOCK_SLEEP_TIME (25) -#endif - -/* * masterLock is used to serialize creation of mutexes, condition variables, * and thread local storage. This is the only place that can count on the * ability to statically initialize the mutex. @@ -58,13 +45,6 @@ static pthread_mutex_t allocLock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t *allocLockPtr = &allocLock; /* - * The mutexLock serializes Tcl_MutexLock. This is necessary to prevent - * races when finalizing a mutex that some other thread may want to lock. - */ - -static pthread_mutex_t mutexLock = PTHREAD_MUTEX_INITIALIZER; - -/* * These are for the critical sections inside this file. */ @@ -380,7 +360,6 @@ TclpMasterUnlock(void) pthread_mutex_unlock(&masterLock); #endif } - /* *---------------------------------------------------------------------- @@ -457,32 +436,12 @@ retry: } MASTER_UNLOCK; } - while (1) { - pthread_mutex_lock(&mutexLock); - pmutexPtr = *((pthread_mutex_t **)mutexPtr); - if (pmutexPtr == NULL) { - pthread_mutex_unlock(&mutexLock); - goto retry; - } - if (pthread_mutex_trylock(pmutexPtr) == 0) { - pthread_mutex_unlock(&mutexLock); - return; - } - pthread_mutex_unlock(&mutexLock); - /* - * BUGBUG: All core and Thread package tests pass when usleep() - * is used; however, the Thread package tests hang at - * various places when Tcl_Sleep() is used, typically - * while running test "thread-17.8", "thread-17.9", or - * "thread-17.11a". Really, what we want here is just - * to yield to other threads for a while. - */ -#ifdef HAVE_USLEEP - usleep(TCL_MUTEX_LOCK_SLEEP_TIME * 1000); -#else - Tcl_Sleep(TCL_MUTEX_LOCK_SLEEP_TIME); -#endif + + pmutexPtr = *((pthread_mutex_t **)mutexPtr); + if (pmutexPtr == NULL) { + goto retry; } + pthread_mutex_lock(pmutexPtr); } /* diff --git a/win/tclWinThrd.c b/win/tclWinThrd.c index ae7ce80..927e115 100644 --- a/win/tclWinThrd.c +++ b/win/tclWinThrd.c @@ -24,16 +24,6 @@ _CRTIMP unsigned int __cdecl _controlfp (unsigned int unNew, unsigned int unMask #endif /* - * This is the number of milliseconds to wait between internal retries in - * the Tcl_MutexLock function. This value must be greater than or equal - * to zero and should be a suitable value for the given platform. - */ - -#ifndef TCL_MUTEX_LOCK_SLEEP_TIME -# define TCL_MUTEX_LOCK_SLEEP_TIME (0) -#endif - -/* * This is the master lock used to serialize access to other serialization * data structures. */ @@ -67,13 +57,6 @@ static int allocOnce = 0; #endif /* TCL_THREADS */ /* - * The mutexLock serializes Tcl_MutexLock. This is necessary to prevent - * races when finalizing a mutex that some other thread may want to lock. - */ - -static CRITICAL_SECTION mutexLock; - -/* * The joinLock serializes Create- and ExitThread. This is necessary to * prevent a race where a new joinable thread exits before the creating thread * had the time to create the necessary data structures in the emulation @@ -386,7 +369,6 @@ TclpInitLock(void) */ init = 1; - InitializeCriticalSection(&mutexLock); InitializeCriticalSection(&joinLock); InitializeCriticalSection(&initLock); InitializeCriticalSection(&masterLock); @@ -534,7 +516,6 @@ void TclFinalizeLock(void) { MASTER_LOCK; - DeleteCriticalSection(&mutexLock); DeleteCriticalSection(&joinLock); /* @@ -605,20 +586,12 @@ retry: } MASTER_UNLOCK; } - while (1) { - EnterCriticalSection(&mutexLock); - csPtr = *((CRITICAL_SECTION **)mutexPtr); - if (csPtr == NULL) { - LeaveCriticalSection(&mutexLock); - goto retry; - } - if (TryEnterCriticalSection(csPtr)) { - LeaveCriticalSection(&mutexLock); - return; - } - LeaveCriticalSection(&mutexLock); - Tcl_Sleep(TCL_MUTEX_LOCK_SLEEP_TIME); + + csPtr = *((CRITICAL_SECTION **)mutexPtr); + if (csPtr == NULL) { + goto retry; } + EnterCriticalSection(csPtr); } /* |