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-rw-r--r--unix/tclUnixThrd.c46
1 files changed, 34 insertions, 12 deletions
diff --git a/unix/tclUnixThrd.c b/unix/tclUnixThrd.c
index edcb0f3..aad394f 100644
--- a/unix/tclUnixThrd.c
+++ b/unix/tclUnixThrd.c
@@ -934,19 +934,20 @@ TclpInetNtoa(struct in_addr addr)
* Additions by AOL for specialized thread memory allocator.
*/
#ifdef USE_THREAD_ALLOC
-static int initialized = 0;
+static volatile int initialized = 0;
static pthread_key_t key;
-static pthread_once_t once = PTHREAD_ONCE_INIT;
+
+typedef struct allocMutex {
+ Tcl_Mutex tlock;
+ pthread_mutex_t plock;
+} allocMutex;
Tcl_Mutex *
TclpNewAllocMutex(void)
{
- struct lock {
- Tcl_Mutex tlock;
- pthread_mutex_t plock;
- } *lockPtr;
+ struct allocMutex *lockPtr;
- lockPtr = malloc(sizeof(struct lock));
+ lockPtr = malloc(sizeof(struct allocMutex));
if (lockPtr == NULL) {
Tcl_Panic("could not allocate lock");
}
@@ -955,20 +956,41 @@ TclpNewAllocMutex(void)
return &lockPtr->tlock;
}
-static void
-InitKey(void)
+void
+TclpFreeAllocMutex(mutex)
+ Tcl_Mutex *mutex; /* The alloc mutex to free. */
+{
+ allocMutex* lockPtr = (allocMutex*) mutex;
+ if (!lockPtr) return;
+ pthread_mutex_destroy(&lockPtr->plock);
+ free(lockPtr);
+}
+
+void TclpFreeAllocCache(ptr)
+ void *ptr;
{
extern void TclFreeAllocCache(void *);
- pthread_key_create(&key, TclFreeAllocCache);
- initialized = 1;
+ TclFreeAllocCache(ptr);
+ /*
+ * Perform proper cleanup of things done in TclpGetAllocCache.
+ */
+ if (initialized) {
+ pthread_key_delete(key);
+ initialized = 0;
+ }
}
void *
TclpGetAllocCache(void)
{
if (!initialized) {
- pthread_once(&once, InitKey);
+ pthread_mutex_lock(allocLockPtr);
+ if (!initialized) {
+ pthread_key_create(&key, TclpFreeAllocCache);
+ initialized = 1;
+ }
+ pthread_mutex_unlock(allocLockPtr);
}
return pthread_getspecific(key);
}