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 59 60
|
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <shared_mutex>
// template <class Mutex> class shared_lock;
// void unlock();
#include <shared_mutex>
#include <cassert>
#if _LIBCPP_STD_VER > 11
bool unlock_called = false;
struct mutex
{
void lock_shared() {}
void unlock_shared() {unlock_called = true;}
};
mutex m;
#endif // _LIBCPP_STD_VER > 11
int main()
{
#if _LIBCPP_STD_VER > 11
std::shared_lock<mutex> lk(m);
lk.unlock();
assert(unlock_called == true);
assert(lk.owns_lock() == false);
try
{
lk.unlock();
assert(false);
}
catch (std::system_error& e)
{
assert(e.code().value() == EPERM);
}
lk.release();
try
{
lk.unlock();
assert(false);
}
catch (std::system_error& e)
{
assert(e.code().value() == EPERM);
}
#endif // _LIBCPP_STD_VER > 11
}
|