1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "SchedulingPolicyService" 18 //#define LOG_NDEBUG 0 19 20 #include <binder/IServiceManager.h> 21 #include <utils/Mutex.h> 22 #include "ISchedulingPolicyService.h" 23 #include "SchedulingPolicyService.h" 24 25 namespace android { 26 27 static sp<ISchedulingPolicyService> sSchedulingPolicyService; 28 static const String16 _scheduling_policy("scheduling_policy"); 29 static Mutex sMutex; 30 31 int requestPriority(pid_t pid, pid_t tid, int32_t prio, bool asynchronous) 32 { 33 // FIXME merge duplicated code related to service lookup, caching, and error recovery 34 int ret; 35 for (;;) { 36 sMutex.lock(); 37 sp<ISchedulingPolicyService> sps = sSchedulingPolicyService; 38 sMutex.unlock(); 39 if (sps == 0) { 40 sp<IBinder> binder = defaultServiceManager()->checkService(_scheduling_policy); 41 if (binder == 0) { 42 sleep(1); 43 continue; 44 } 45 sps = interface_cast<ISchedulingPolicyService>(binder); 46 sMutex.lock(); 47 sSchedulingPolicyService = sps; 48 sMutex.unlock(); 49 } 50 ret = sps->requestPriority(pid, tid, prio, asynchronous); 51 if (ret != DEAD_OBJECT) { 52 break; 53 } 54 ALOGW("SchedulingPolicyService died"); 55 sMutex.lock(); 56 sSchedulingPolicyService.clear(); 57 sMutex.unlock(); 58 } 59 return ret; 60 } 61 62 } // namespace android 63
