libcxx/test/std/thread/thread.condition/thread.condition.condvarany/wait.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: no-threads
  10
  11 // <condition_variable>
  12
  13 // class condition_variable_any;
  14
  15 // template <class Lock>
  16 //   void wait(Lock& lock);
  17
  18 #include <condition_variable>
  19 #include <mutex>
  20 #include <thread>
  21 #include <cassert>
  22
  23 #include "make_test_thread.h"
  24 #include "test_macros.h"
  25
  26 std::condition_variable_any cv;
  27
  28 typedef std::timed_mutex L0;
  29 typedef std::unique_lock<L0> L1;
  30
  31 L0 m0;
  32
  33 int test1 = 0;
  34 int test2 = 0;
  35
  36 void f()
  37 {
  38     L1 lk(m0);
  39     assert(test2 == 0);
  40     test1 = 1;
  41     cv.notify_one();
  42     while (test2 == 0)
  43         cv.wait(lk);
  44     assert(test2 != 0);
  45 }
  46
  47 int main(int, char**)
  48 {
  49     L1 lk(m0);
  50     std::thread t = support::make_test_thread(f);
  51     assert(test1 == 0);
  52     while (test1 == 0)
  53         cv.wait(lk);
  54     assert(test1 != 0);
  55     test2 = 1;
  56     lk.unlock();
  57     cv.notify_one();
  58     t.join();
  59
  60   return 0;
  61 }