grpc1.45.2/third_party/libuv/test/test-thread-equal.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"

uv_thread_t main_thread_id;
uv_thread_t subthreads[2];

static void check_thread(void* arg) {
  uv_thread_t *thread_id = arg;
  uv_thread_t self_id = uv_thread_self();
  ASSERT(uv_thread_equal(&main_thread_id, &self_id) == 0);
  *thread_id = uv_thread_self();
}

TEST_IMPL(thread_equal) {
  uv_thread_t threads[2];
  main_thread_id = uv_thread_self();
  ASSERT(0 != uv_thread_equal(&main_thread_id, &main_thread_id));
  ASSERT(0 == uv_thread_create(threads + 0, check_thread, subthreads + 0));
  ASSERT(0 == uv_thread_create(threads + 1, check_thread, subthreads + 1));
  ASSERT(0 == uv_thread_join(threads + 0));
  ASSERT(0 == uv_thread_join(threads + 1));
  ASSERT(0 == uv_thread_equal(subthreads + 0, subthreads + 1));
  return 0;
}