| /* |
| * Copyright 2015 The Android Open Source Project |
| * |
| * 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 <binder/ProcessInfoService.h> |
| #include <binder/IServiceManager.h> |
| |
| #include <utils/Log.h> |
| #include <utils/String16.h> |
| |
| namespace android { |
| |
| ProcessInfoService::ProcessInfoService() { |
| updateBinderLocked(); |
| } |
| |
| status_t ProcessInfoService::getProcessStatesImpl(size_t length, /*in*/ int32_t* pids, |
| /*out*/ int32_t* states) { |
| status_t err = NO_ERROR; |
| sp<IProcessInfoService> pis; |
| mProcessInfoLock.lock(); |
| pis = mProcessInfoService; |
| mProcessInfoLock.unlock(); |
| |
| for (int i = 0; i < BINDER_ATTEMPT_LIMIT; i++) { |
| |
| if (pis != nullptr) { |
| err = pis->getProcessStatesFromPids(length, /*in*/ pids, /*out*/ states); |
| if (err == NO_ERROR) return NO_ERROR; // success |
| if (IInterface::asBinder(pis)->isBinderAlive()) return err; |
| } |
| sleep(1); |
| |
| mProcessInfoLock.lock(); |
| if (pis == mProcessInfoService) { |
| updateBinderLocked(); |
| } |
| pis = mProcessInfoService; |
| mProcessInfoLock.unlock(); |
| } |
| |
| ALOGW("%s: Could not retrieve process states from ProcessInfoService after %d retries.", |
| __FUNCTION__, BINDER_ATTEMPT_LIMIT); |
| |
| return TIMED_OUT; |
| } |
| |
| status_t ProcessInfoService::getProcessStatesScoresImpl(size_t length, |
| /*in*/ int32_t* pids, /*out*/ int32_t* states, |
| /*out*/ int32_t *scores) { |
| status_t err = NO_ERROR; |
| sp<IProcessInfoService> pis; |
| mProcessInfoLock.lock(); |
| pis = mProcessInfoService; |
| mProcessInfoLock.unlock(); |
| |
| for (int i = 0; i < BINDER_ATTEMPT_LIMIT; i++) { |
| |
| if (pis != nullptr) { |
| err = pis->getProcessStatesAndOomScoresFromPids(length, |
| /*in*/ pids, /*out*/ states, /*out*/ scores); |
| if (err == NO_ERROR) return NO_ERROR; // success |
| if (IInterface::asBinder(pis)->isBinderAlive()) return err; |
| } |
| sleep(1); |
| |
| mProcessInfoLock.lock(); |
| if (pis == mProcessInfoService) { |
| updateBinderLocked(); |
| } |
| pis = mProcessInfoService; |
| mProcessInfoLock.unlock(); |
| } |
| |
| ALOGW("%s: Could not retrieve process states and scores " |
| "from ProcessInfoService after %d retries.", __FUNCTION__, |
| BINDER_ATTEMPT_LIMIT); |
| |
| return TIMED_OUT; |
| } |
| |
| void ProcessInfoService::updateBinderLocked() { |
| const sp<IServiceManager> sm(defaultServiceManager()); |
| if (sm != nullptr) { |
| const String16 name("processinfo"); |
| mProcessInfoService = interface_cast<IProcessInfoService>(sm->checkService(name)); |
| } |
| } |
| |
| ANDROID_SINGLETON_STATIC_INSTANCE(ProcessInfoService); |
| |
| }; // namespace android |