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//===-- Implementation for Rwlock's timedwrlock function ------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/pthread/pthread_rwlock_timedwrlock.h"
#include "src/__support/common.h"
#include "src/__support/libc_assert.h"
#include "src/__support/macros/config.h"
#include "src/__support/macros/optimization.h"
#include "src/__support/threads/linux/rwlock.h"
#include "src/__support/time/linux/abs_timeout.h"
#include <pthread.h>
namespace LIBC_NAMESPACE_DECL {
LLVM_LIBC_FUNCTION(int, pthread_rwlock_timedwrlock,
(pthread_rwlock_t *__restrict rwlock,
const struct timespec *__restrict abstime)) {
if (!rwlock)
return EINVAL;
RwLock *rw = reinterpret_cast<RwLock *>(rwlock);
LIBC_ASSERT(abstime && "timedwrlock called with a null timeout");
auto timeout =
internal::AbsTimeout::from_timespec(*abstime, /*is_realtime=*/true);
if (LIBC_LIKELY(timeout.has_value()))
return static_cast<int>(rw->write_lock(timeout.value()));
switch (timeout.error()) {
case internal::AbsTimeout::Error::Invalid:
return EINVAL;
case internal::AbsTimeout::Error::BeforeEpoch:
return ETIMEDOUT;
}
__builtin_unreachable();
}
} // namespace LIBC_NAMESPACE_DECL
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