libc/src/threads/mtx_lock.cpp

   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