text: /*
   *
   * 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 support. */
  
  #include "src/core/lib/gprpp/thd.h"
  
  #include <stdio.h>
  #include <stdlib.h>
  
  #include <grpc/support/log.h>
  #include <grpc/support/sync.h>
  #include <grpc/support/time.h>
  
  #include "test/core/util/test_config.h"
  
  #define NUM_THREADS 100
  
  struct test {
    gpr_mu mu;
    int n;
    int is_done;
    gpr_cv done_cv;
  };
  
  /* A Thread body.   Decrement t->n, and if is becomes zero, set t->done. */
  static void thd_body1(void* v) {
    struct test* t = static_cast<struct test*>(v);
    gpr_mu_lock(&t->mu);
    t->n--;
    if (t->n == 0) {
      t->is_done = 1;
      gpr_cv_signal(&t->done_cv);
    }
    gpr_mu_unlock(&t->mu);
  }
  
  /* Test that we can create a number of threads, wait for them, and join them. */
  static void test1(void) {
    grpc_core::Thread thds[NUM_THREADS];
    struct test t;
    gpr_mu_init(&t.mu);
    gpr_cv_init(&t.done_cv);
    t.n = NUM_THREADS;
    t.is_done = 0;
    for (auto& th : thds) {
      th = grpc_core::Thread("grpc_thread_body1_test", &thd_body1, &t);
      th.Start();
    }
    gpr_mu_lock(&t.mu);
    while (!t.is_done) {
      gpr_cv_wait(&t.done_cv, &t.mu, gpr_inf_future(GPR_CLOCK_REALTIME));
    }
    gpr_mu_unlock(&t.mu);
    for (auto& th : thds) {
      th.Join();
    }
    GPR_ASSERT(t.n == 0);
  }
  
  static void thd_body2(void* v) {}
  
  /* Test that we can create a number of threads and join them. */
  static void test2(void) {
    grpc_core::Thread thds[NUM_THREADS];
    for (auto& th : thds) {
      bool ok;
      th = grpc_core::Thread("grpc_thread_body2_test", &thd_body2, nullptr, &ok);
      GPR_ASSERT(ok);
      th.Start();
    }
    for (auto& th : thds) {
      th.Join();
    }
  }
  
  /* ------------------------------------------------- */
  
  int main(int argc, char* argv[]) {
    grpc_test_init(argc, argv);
    test1();
    test2();
    return 0;
  }
  