third_party_mesa3d/src/gallium/tests/unit/pipe_barrier_test.c

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/*
 *  Test case for pipe_barrier.
 *
 *  The test succeeds if no thread exits before all the other threads reach
 *  the barrier.
 */


#include <stdio.h>

#include "os/os_thread.h"
#include "os/os_time.h"


#define NUM_THREADS 10

static pipe_thread threads[NUM_THREADS];
static pipe_barrier barrier;
static int thread_ids[NUM_THREADS];


static PIPE_THREAD_ROUTINE(thread_function, thread_data)
{
   int thread_id = *((int *) thread_data);

   printf("thread %d starting\n", thread_id);
   os_time_sleep(thread_id * 1000 * 1000);
   printf("thread %d before barrier\n", thread_id);
   pipe_barrier_wait(&barrier);
   printf("thread %d exiting\n", thread_id);

   return 0;
}


int main()
{
   int i;

   printf("pipe_barrier_test starting\n");

   pipe_barrier_init(&barrier, NUM_THREADS);

   for (i = 0; i < NUM_THREADS; i++) {
      thread_ids[i] = i;
      threads[i] = pipe_thread_create(thread_function, (void *) &thread_ids[i]);
   }

   for (i = 0; i < NUM_THREADS; i++ ) {
      pipe_thread_wait(threads[i]);
   }

   pipe_barrier_destroy(&barrier);

   printf("pipe_barrier_test exiting\n");

   return 0;
}