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// <mutex>
10
11// template <class Mutex> class unique_lock;
12
13// void lock();
14
15#include <cassert>
16#include <mutex>
17#include <system_error>
18
19#include "checking_mutex.h"
20#include "test_macros.h"
21
22int main(int, char**) {
23 checking_mutex mux;
24 std::unique_lock<checking_mutex> lk(mux, std::defer_lock_t());
25 assert(mux.last_try == checking_mutex::none);
26 lk.lock();
27 assert(mux.current_state == checking_mutex::locked_via_lock);
28 mux.last_try = checking_mutex::none;
29
30#ifndef TEST_HAS_NO_EXCEPTIONS
31 try {
32 mux.last_try = checking_mutex::none;
33 lk.lock();
34 assert(false);
35 } catch (std::system_error& e) {
36 assert(mux.last_try == checking_mutex::none);
37 assert(e.code() == std::errc::resource_deadlock_would_occur);
38 }
39
40 lk.unlock();
41 lk.release();
42
43 try {
44 mux.last_try = checking_mutex::none;
45 lk.lock();
46 assert(false);
47 } catch (std::system_error& e) {
48 assert(mux.last_try == checking_mutex::none);
49 assert(e.code() == std::errc::operation_not_permitted);
50 }
51#endif
52
53 return 0;
54}
55

source code of libcxx/test/std/thread/thread.mutex/thread.lock/thread.lock.unique/thread.lock.unique.locking/lock.pass.cpp