1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <condition_variable>
// class condition_variable;
// ~condition_variable();
#include <condition_variable>
#include <mutex>
#include <thread>
#include <cassert>
std::condition_variable* cv;
std::mutex m;
typedef std::unique_lock<std::mutex> Lock;
bool f_ready = false;
bool g_ready = false;
void f()
{
Lock lk(m);
f_ready = true;
cv->notify_one();
delete cv;
}
void g()
{
Lock lk(m);
g_ready = true;
cv->notify_one();
while (!f_ready)
cv->wait(lk);
}
int main()
{
cv = new std::condition_variable;
std::thread th2(g);
Lock lk(m);
while (!g_ready)
cv->wait(lk);
lk.unlock();
std::thread th1(f);
th1.join();
th2.join();
}
|
