59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
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// Copyright 2022 The Crashpad Authors. All rights reserved.
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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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#include "util/ios/scoped_background_task.h"
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#import <Foundation/Foundation.h>
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#if !defined(__has_feature) || !__has_feature(objc_arc)
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#error "This file requires ARC support."
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#endif
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namespace crashpad {
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namespace internal {
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ScopedBackgroundTask::ScopedBackgroundTask(const char* task_name)
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: task_complete_semaphore_(dispatch_semaphore_create(0)) {
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__weak dispatch_semaphore_t weak_task_complete_semaphore =
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task_complete_semaphore_;
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NSString* name = [NSString stringWithUTF8String:task_name];
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[[NSProcessInfo processInfo]
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performExpiringActivityWithReason:name
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usingBlock:^(BOOL expired) {
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if (expired) {
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// TODO(crbug.com/crashpad/400): Notify the
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// BG task creator that time's up -- this will
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// be useful for BackgroundTasks and
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// NSURLSessions.
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return;
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}
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__strong dispatch_semaphore_t
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strong_task_complete_semaphore =
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weak_task_complete_semaphore;
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if (!strong_task_complete_semaphore) {
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return;
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}
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dispatch_semaphore_wait(
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strong_task_complete_semaphore,
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DISPATCH_TIME_FOREVER);
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}];
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}
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ScopedBackgroundTask::~ScopedBackgroundTask() {
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dispatch_semaphore_signal(task_complete_semaphore_);
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}
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} // namespace internal
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} // namespace crashpad
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