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/*
* Copyright (C) 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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "ProcessInfo"
#include <utils/Log.h>
#include <media/stagefright/ProcessInfo.h>
#include <binder/IPCThreadState.h>
#include <binder/IProcessInfoService.h>
#include <binder/IServiceManager.h>
namespace android {
ProcessInfo::ProcessInfo() {}
bool ProcessInfo::getPriority(int pid, int* priority) {
sp<IBinder> binder = defaultServiceManager()->getService(String16("processinfo"));
sp<IProcessInfoService> service = interface_cast<IProcessInfoService>(binder);
size_t length = 1;
int32_t state;
static const int32_t INVALID_ADJ = -10000;
static const int32_t NATIVE_ADJ = -1000;
int32_t score = INVALID_ADJ;
status_t err = service->getProcessStatesAndOomScoresFromPids(length, &pid, &state, &score);
if (err != OK) {
ALOGE("getProcessStatesAndOomScoresFromPids failed");
return false;
}
ALOGV("pid %d state %d score %d", pid, state, score);
if (score <= NATIVE_ADJ) {
ALOGE("pid %d invalid OOM adjustments value %d", pid, score);
return false;
}
// Use OOM adjustments value as the priority. Lower the value, higher the priority.
*priority = score;
return true;
}
bool ProcessInfo::isValidPid(int pid) {
int callingPid = IPCThreadState::self()->getCallingPid();
// Trust it if this is called from the same process otherwise pid has to match the calling pid.
return (callingPid == getpid()) || (callingPid == pid);
}
ProcessInfo::~ProcessInfo() {}
} // namespace android
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