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

GPR_TLS_DECL(test_var);

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

  GPR_ASSERT(gpr_tls_get(&test_var) == 0);

  for (i = 0; i < 100000; i++) {
    gpr_tls_set(&test_var, i);
    GPR_ASSERT(gpr_tls_get(&test_var) == i);
  }
  gpr_tls_set(&test_var, 0);
}

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

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

  grpc_test_init(argc, argv);

  gpr_tls_init(&test_var);

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

  gpr_tls_destroy(&test_var);

  return 0;
}