pthread_waiter.cc | Explore in Territory

// Copyright 2023 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "absl/synchronization/internal/pthread_waiter.h"

#ifdef ABSL_INTERNAL_HAVE_PTHREAD_WAITER

#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>

#include <cassert>
#include <cerrno>

#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/base/internal/thread_identity.h"
#include "absl/base/optimization.h"
#include "absl/synchronization/internal/kernel_timeout.h"

namespace absl {
ABSL_NAMESPACE_BEGIN
namespace synchronization_internal {

namespace {
class PthreadMutexHolder { … };
}  // namespace

#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
constexpr char PthreadWaiter::kName[];
#endif

PthreadWaiter::PthreadWaiter() : … { … }

#ifdef __APPLE__
#define ABSL_INTERNAL_HAS_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP …
#endif

#if defined(__GLIBC__) && \
    (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 30))
#define ABSL_INTERNAL_HAVE_PTHREAD_COND_CLOCKWAIT …
#elif defined(__ANDROID_API__) && __ANDROID_API__ >= 30
#define ABSL_INTERNAL_HAVE_PTHREAD_COND_CLOCKWAIT …
#endif

// Calls pthread_cond_timedwait() or possibly something else like
// pthread_cond_timedwait_relative_np() depending on the platform and
// KernelTimeout requested. The return value is the same as the return
// value of pthread_cond_timedwait().
int PthreadWaiter::TimedWait(KernelTimeout t) { … }

bool PthreadWaiter::Wait(KernelTimeout t) { … }

void PthreadWaiter::Post() { … }

void PthreadWaiter::Poke() { … }

void PthreadWaiter::InternalCondVarPoke() { … }

}  // namespace synchronization_internal
ABSL_NAMESPACE_END
}  // namespace absl

#endif  // ABSL_INTERNAL_HAVE_PTHREAD_WAITER
chromium/third_party/abseil-cpp/absl/synchronization/internal/pthread_waiter.cc
