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