33 lines · cpp
1//===-- Implementation for Rwlock's wrlock 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 "src/pthread/pthread_rwlock_wrlock.h"10 11#include "src/__support/common.h"12#include "src/__support/macros/config.h"13#include "src/__support/threads/linux/rwlock.h"14 15#include <pthread.h>16 17namespace LIBC_NAMESPACE_DECL {18 19static_assert(20 sizeof(RwLock) == sizeof(pthread_rwlock_t) &&21 alignof(RwLock) == alignof(pthread_rwlock_t),22 "The public pthread_rwlock_t type must be of the same size and alignment "23 "as the internal rwlock type.");24 25LLVM_LIBC_FUNCTION(int, pthread_rwlock_wrlock, (pthread_rwlock_t * rwlock)) {26 if (!rwlock)27 return EINVAL;28 RwLock *rw = reinterpret_cast<RwLock *>(rwlock);29 return static_cast<int>(rw->write_lock());30}31 32} // namespace LIBC_NAMESPACE_DECL33