int main(int argc, char* argv[]) // main begins
{
// Read in the command line arguments
const unsigned int numThreads = 5;
fprintf(stderr, "TestManyMutex: Initting barrier.\n");
// FIXME: shouldn't be hardcoding the barrier count here
CarbonMutexInit(&my_mux1);
CarbonMutexInit(&my_mux2);
CarbonMutexInit(&my_mux3);
fprintf(stderr, "TestManyMutex: Barrier Initialized.\n");
// Declare threads and related variables
pthread_t threads[numThreads];
#ifdef DEBUG
printf("This is the function main()\n");
#endif
#ifdef DEBUG
printf("Spawning threads\n");
#endif
for (unsigned int i = 0; i < numThreads; i++)
pthread_create(&threads[i], NULL, test_many_mutex, (void *) i);
// Wait for all threads to complete
for (unsigned int i = 0; i < numThreads; i++)
pthread_join(threads[i], NULL);
#ifdef DEBUG
printf("This is the function main ending\n");
#endif
return 0;
} // main ends
void* test_many_mutex(void *threadid)
{
// Declare local variables
int tid = (int) threadid;
// Thread starts here
// FIXME: This should be in the main thread or something.
if (tid == 0)
{
fprintf(stderr, "TestManyMutex(%d): Initting barrier.\n", (int)tid);
// FIXME: shouldn't be hardcoding the barrier count here
CarbonMutexInit(&my_mux1);
CarbonMutexInit(&my_mux2);
CarbonMutexInit(&my_mux3);
fprintf(stderr, "TestManyMutex(%d): Barrier Initialized.\n", (int)tid);
}
else
{
sleep(1);
}
for (int i = 0; i < 1000; i++)
{
CarbonMutexLock(&my_mux1);
CarbonMutexLock(&my_mux2);
CarbonMutexLock(&my_mux3);
if (i % 100 == 0)
fprintf(stderr, "Thread %d got %dth lock...\n", tid, i);
CarbonMutexUnlock(&my_mux3);
CarbonMutexUnlock(&my_mux2);
CarbonMutexUnlock(&my_mux1);
}
return NULL;
}
