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
22namespace android {
23
24static sp<ISchedulingPolicyService> sSchedulingPolicyService;
25static const String16 _scheduling_policy("scheduling_policy");
26static Mutex sMutex;
27
28int requestPriority(pid_t pid, pid_t tid, int32_t prio)
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);
50}
51
52}   // namespace android
53