#ifdef TCL_THREADS
/*
 * Additions by AOL for specialized thread memory allocator.
 */

#ifdef USE_THREAD_ALLOC
static volatile int initialized = 0;
static pthread_key_t key;

typedef struct {
    Tcl_Mutex tlock;
    pthread_mutex_t plock;
} allocMutex;

    allocMutex* lockPtr = (allocMutex*) mutex;
    if (!lockPtr) {
	return;
    }
    pthread_mutex_destroy(&lockPtr->plock);
    free(lockPtr);
}









void
TclpFreeAllocCache(
    void *ptr)
{
    if (ptr != NULL) {
	/*
	 * Called by the pthread lib when a thread exits
	 */

	TclFreeAllocCache(ptr);
	pthread_setspecific(key, NULL);

    } else if (initialized) {
	/*
	 * Called by us in TclFinalizeThreadAlloc() during the library
	 * finalization initiated from Tcl_Finalize()
	 */

	pthread_key_delete(key);
	initialized = 0;
    }
}

void *
TclpGetAllocCache(void)
{
    if (!initialized) {
	pthread_mutex_lock(allocLockPtr);
	if (!initialized) {
	    pthread_key_create(&key, TclpFreeAllocCache);
	    initialized = 1;
	}
	pthread_mutex_unlock(allocLockPtr);
    }
    return pthread_getspecific(key);
}

void
TclpSetAllocCache(
    void *arg)
{