diff options
Diffstat (limited to 'libs/binder/ProcessInfoService.cpp')
-rw-r--r-- | libs/binder/ProcessInfoService.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/libs/binder/ProcessInfoService.cpp b/libs/binder/ProcessInfoService.cpp new file mode 100644 index 0000000..fb28643 --- /dev/null +++ b/libs/binder/ProcessInfoService.cpp @@ -0,0 +1,70 @@ +/* + * 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 != NULL) { + 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; +} + +void ProcessInfoService::updateBinderLocked() { + const sp<IServiceManager> sm(defaultServiceManager()); + if (sm != NULL) { + const String16 name("processinfo"); + mProcessInfoService = interface_cast<IProcessInfoService>(sm->checkService(name)); + } +} + +ANDROID_SINGLETON_STATIC_INSTANCE(ProcessInfoService); + +}; // namespace android |