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