grpc/test/core/gpr/tls_test.cc

/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

/* Test of gpr thread local storage support. */

#include "src/core/lib/gpr/tls.h"

#include <stdio.h>
#include <stdlib.h>

#include <grpc/support/log.h>
#include <grpc/support/sync.h>

#include "src/core/lib/gprpp/thd.h"
#include "test/core/util/test_config.h"

#define NUM_THREADS 100

static GPR_THREAD_LOCAL(intptr_t) test_var;

static void thd_body(void* /*arg*/) {
  intptr_t i;

  GPR_ASSERT(test_var == 0);

  for (i = 0; i < 100000; i++) {
    test_var = i;
    GPR_ASSERT(test_var == i);
  }
  test_var = 0;
}

/* ------------------------------------------------- */

int main(int argc, char* argv[]) {
  grpc_core::Thread threads[NUM_THREADS];

  grpc::testing::TestEnvironment env(argc, argv);

  for (auto& th : threads) {
    th = grpc_core::Thread("grpc_tls_test", thd_body, nullptr);
    th.Start();
  }
  for (auto& th : threads) {
    th.Join();
  }

  return 0;
}