libc/src/pthread/pthread_mutex_lock.cpp

   1 //===-- Linux implementation of the pthread_mutex_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 "pthread_mutex_lock.h"
  10
  11 #include "src/__support/common.h"
  12 #include "src/__support/threads/mutex.h"
  13
  14 #include <pthread.h>
  15
  16 namespace __llvm_libc {
  17
  18 // The implementation currently handles only plain mutexes.
  19 LLVM_LIBC_FUNCTION(int, pthread_mutex_lock, (pthread_mutex_t * mutex)) {
  20   reinterpret_cast<Mutex *>(mutex)->lock();
  21   // TODO: When the Mutex class supports all the possible error conditions
  22   // return the appropriate error value here.
  23   return 0;
  24 }
  25
  26 } // namespace __llvm_libc