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 "src/__support/common.h" 11 #include "src/__support/macros/config.h" 12 #include "src/__support/threads/mutex.h" 13 14 #include <threads.h> // For mtx_t definition. 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 // The implementation currently handles only plain mutexes. 19 LLVM_LIBC_FUNCTION(int, mtx_lock, (mtx_t * mutex)) { 20 auto *m = reinterpret_cast<Mutex *>(mutex); 21 auto err = m->lock(); 22 return err == MutexError::NONE ? thrd_success : thrd_error; 23 } 24 25 } // namespace LIBC_NAMESPACE_DECL 26