35 lines
859 B
C++
35 lines
859 B
C++
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// 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.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
// <atomic>
|
||
|
|
|
||
|
|
// struct atomic_flag
|
||
|
|
|
||
|
|
// bool atomic_flag_test_and_set(volatile atomic_flag*);
|
||
|
|
// bool atomic_flag_test_and_set(atomic_flag*);
|
||
|
|
|
||
|
|
#include <atomic>
|
||
|
|
#include <cassert>
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
{
|
||
|
|
std::atomic_flag f;
|
||
|
|
f.clear();
|
||
|
|
assert(atomic_flag_test_and_set(&f) == 0);
|
||
|
|
assert(f.test_and_set() == 1);
|
||
|
|
}
|
||
|
|
{
|
||
|
|
volatile std::atomic_flag f;
|
||
|
|
f.clear();
|
||
|
|
assert(atomic_flag_test_and_set(&f) == 0);
|
||
|
|
assert(f.test_and_set() == 1);
|
||
|
|
}
|
||
|
|
}
|