112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <folly/Executor.h>
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#include <stdexcept>
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#include <glog/logging.h>
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#include <folly/ExceptionString.h>
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#include <folly/Portability.h>
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#include <folly/lang/Exception.h>
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namespace folly {
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void Executor::invokeCatchingExnsLog(char const* const prefix) noexcept {
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auto ep = std::current_exception();
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LOG(ERROR) << prefix << " threw unhandled " << exceptionStr(ep);
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}
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void Executor::addWithPriority(Func, int8_t /* priority */) {
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throw std::runtime_error(
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"addWithPriority() is not implemented for this Executor");
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}
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bool Executor::keepAliveAcquire() noexcept {
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return false;
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}
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void Executor::keepAliveRelease() noexcept {
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LOG(FATAL) << __func__ << "() should not be called for folly::Executor types "
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<< "which do not override keepAliveAcquire()";
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}
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// Base case of permitting with no termination to avoid nullptr tests
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static ExecutorBlockingList emptyList{nullptr, {false, false, nullptr, {}}};
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thread_local ExecutorBlockingList* executor_blocking_list = &emptyList;
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Optional<ExecutorBlockingContext> getExecutorBlockingContext() noexcept {
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return //
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kIsMobile || !executor_blocking_list->curr.forbid ? none : //
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make_optional(executor_blocking_list->curr);
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}
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ExecutorBlockingGuard::ExecutorBlockingGuard(PermitTag) noexcept {
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if (!kIsMobile) {
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list_ = *executor_blocking_list;
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list_.prev = executor_blocking_list;
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list_.curr.forbid = false;
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// Do not overwrite tag or executor pointer
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executor_blocking_list = &list_;
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}
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}
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ExecutorBlockingGuard::ExecutorBlockingGuard(
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TrackTag, Executor* ex, StringPiece tag) noexcept {
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if (!kIsMobile) {
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list_ = *executor_blocking_list;
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list_.prev = executor_blocking_list;
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list_.curr.forbid = true;
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list_.curr.ex = ex;
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// If no string was provided, maintain the parent string to keep some
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// information
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if (!tag.empty()) {
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list_.curr.tag = tag;
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}
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executor_blocking_list = &list_;
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}
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}
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ExecutorBlockingGuard::ExecutorBlockingGuard(
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ProhibitTag, Executor* ex, StringPiece tag) noexcept {
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if (!kIsMobile) {
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list_ = *executor_blocking_list;
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list_.prev = executor_blocking_list;
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list_.curr.forbid = true;
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list_.curr.ex = ex;
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list_.curr.allowTerminationOnBlocking = true;
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// If no string was provided, maintain the parent string to keep some
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// information
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if (!tag.empty()) {
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list_.curr.tag = tag;
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}
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executor_blocking_list = &list_;
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}
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}
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ExecutorBlockingGuard::~ExecutorBlockingGuard() {
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if (!kIsMobile) {
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if (executor_blocking_list != &list_) {
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terminate_with<std::logic_error>("dtor mismatch");
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}
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executor_blocking_list = list_.prev;
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}
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}
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} // namespace folly
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