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 #include <binder/IServiceManager.h>
18 #include <utils/Mutex.h>
19 #include "ISchedulingPolicyService.h"
20 #include "SchedulingPolicyService.h"
21
22 namespace android {
23
24 static sp<ISchedulingPolicyService> sSchedulingPolicyService;
25 static const String16 _scheduling_policy("scheduling_policy");
26 static Mutex sMutex;
27
requestPriority(pid_t pid,pid_t tid,int32_t prio,bool asynchronous)28 int requestPriority(pid_t pid, pid_t tid, int32_t prio, bool asynchronous)
29 {
30 // FIXME merge duplicated code related to service lookup, caching, and error recovery
31 sp<ISchedulingPolicyService> sps;
32 for (;;) {
33 sMutex.lock();
34 sps = sSchedulingPolicyService;
35 sMutex.unlock();
36 if (sps != 0) {
37 break;
38 }
39 sp<IBinder> binder = defaultServiceManager()->checkService(_scheduling_policy);
40 if (binder != 0) {
41 sps = interface_cast<ISchedulingPolicyService>(binder);
42 sMutex.lock();
43 sSchedulingPolicyService = sps;
44 sMutex.unlock();
45 break;
46 }
47 sleep(1);
48 }
49 return sps->requestPriority(pid, tid, prio, asynchronous);
50 }
51
52 } // namespace android
53