urbit/outside/libuv_0.11/test/test-barrier.c

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 * The above copyright notice and this permission notice shall be included in
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#include "uv.h"
#include "task.h"

#include <string.h>
#include <errno.h>

typedef struct {
  uv_barrier_t barrier;
  int delay;
  volatile int posted;
  int main_barrier_wait_rval;
  int worker_barrier_wait_rval;
} worker_config;


static void worker(void* arg) {
  worker_config* c = arg;

  if (c->delay)
    uv_sleep(c->delay);

  c->worker_barrier_wait_rval = uv_barrier_wait(&c->barrier);
}


TEST_IMPL(barrier_1) {
  uv_thread_t thread;
  worker_config wc;

  memset(&wc, 0, sizeof(wc));

  ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
  ASSERT(0 == uv_thread_create(&thread, worker, &wc));

  uv_sleep(100);
  wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);

  ASSERT(0 == uv_thread_join(&thread));
  uv_barrier_destroy(&wc.barrier);

  ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));

  return 0;
}


TEST_IMPL(barrier_2) {
  uv_thread_t thread;
  worker_config wc;

  memset(&wc, 0, sizeof(wc));
  wc.delay = 100;

  ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
  ASSERT(0 == uv_thread_create(&thread, worker, &wc));

  wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);

  ASSERT(0 == uv_thread_join(&thread));
  uv_barrier_destroy(&wc.barrier);

  ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));

  return 0;
}


TEST_IMPL(barrier_3) {
  uv_thread_t thread;
  worker_config wc;

  memset(&wc, 0, sizeof(wc));

  ASSERT(0 == uv_barrier_init(&wc.barrier, 2));
  ASSERT(0 == uv_thread_create(&thread, worker, &wc));

  wc.main_barrier_wait_rval = uv_barrier_wait(&wc.barrier);

  ASSERT(0 == uv_thread_join(&thread));
  uv_barrier_destroy(&wc.barrier);

  ASSERT(1 == (wc.main_barrier_wait_rval ^ wc.worker_barrier_wait_rval));

  return 0;
}