44 lines · cpp
1//===-- Implementation for Rwlock's timedwrlock 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_timedwrlock.h"10 11#include "src/__support/common.h"12#include "src/__support/libc_assert.h"13#include "src/__support/macros/config.h"14#include "src/__support/macros/optimization.h"15#include "src/__support/threads/linux/rwlock.h"16#include "src/__support/time/linux/abs_timeout.h"17 18#include <pthread.h>19 20namespace LIBC_NAMESPACE_DECL {21 22LLVM_LIBC_FUNCTION(int, pthread_rwlock_timedwrlock,23 (pthread_rwlock_t *__restrict rwlock,24 const struct timespec *__restrict abstime)) {25 if (!rwlock)26 return EINVAL;27 RwLock *rw = reinterpret_cast<RwLock *>(rwlock);28 LIBC_ASSERT(abstime && "timedwrlock called with a null timeout");29 auto timeout =30 internal::AbsTimeout::from_timespec(*abstime, /*is_realtime=*/true);31 if (LIBC_LIKELY(timeout.has_value()))32 return static_cast<int>(rw->write_lock(timeout.value()));33 34 switch (timeout.error()) {35 case internal::AbsTimeout::Error::Invalid:36 return EINVAL;37 case internal::AbsTimeout::Error::BeforeEpoch:38 return ETIMEDOUT;39 }40 __builtin_unreachable();41}42 43} // namespace LIBC_NAMESPACE_DECL44