37 lines · cpp
1//===-- Linux implementation of the pthread_mutex_init 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-exception6//7//===----------------------------------------------------------------------===//8 9#include "pthread_mutex_init.h"10#include "pthread_mutexattr.h"11 12#include "src/__support/common.h"13#include "src/__support/macros/config.h"14#include "src/__support/threads/mutex.h"15 16#include <pthread.h>17 18namespace LIBC_NAMESPACE_DECL {19 20static_assert(sizeof(Mutex) <= sizeof(pthread_mutex_t),21 "The public pthread_mutex_t type cannot accommodate the internal "22 "mutex type.");23 24LLVM_LIBC_FUNCTION(int, pthread_mutex_init,25 (pthread_mutex_t * m,26 const pthread_mutexattr_t *__restrict attr)) {27 auto mutexattr = attr == nullptr ? DEFAULT_MUTEXATTR : *attr;28 auto err =29 Mutex::init(reinterpret_cast<Mutex *>(m), /*is_timed=*/true,30 get_mutexattr_type(mutexattr) & PTHREAD_MUTEX_RECURSIVE,31 get_mutexattr_robust(mutexattr) & PTHREAD_MUTEX_ROBUST,32 get_mutexattr_pshared(mutexattr) & PTHREAD_PROCESS_SHARED);33 return err == MutexError::NONE ? 0 : EAGAIN;34}35 36} // namespace LIBC_NAMESPACE_DECL37