1 //===-- Linux implementation of the mtx_lock function ---------------------===//
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 #include "src/threads/mtx_lock.h"
10 #include "include/threads.h" // For mtx_t definition.
11 #include "src/__support/common.h"
12 #include "src/__support/threads/mutex.h"
13 
14 namespace __llvm_libc {
15 
16 // The implementation currently handles only plain mutexes.
17 LLVM_LIBC_FUNCTION(int, mtx_lock, (mtx_t * mutex)) {
18   auto *m = reinterpret_cast<Mutex *>(mutex);
19   auto err = m->lock();
20   return err == MutexError::NONE ? thrd_success : thrd_error;
21 }
22 
23 } // namespace __llvm_libc
24