LegacySupport.h revision 00f4a391c6f9a698bbcbbd05bf3d80e213c82884 
1/*
2 * Copyright (C) 2016 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 <utils/Log.h>
18
19#include <hwbinder/IPCThreadState.h>
20#include <hwbinder/ProcessState.h>
21#include <utils/Errors.h>
22#include <utils/StrongPointer.h>
23
24#ifndef ANDROID_HIDL_LEGACY_SUPPORT_H
25#define ANDROID_HIDL_LEGACY_SUPPORT_H
26
27namespace android {
28namespace hardware {
29
30/**
31 * Registers passthrough service implementation.
32 */
33template<class Interface>
34status_t registerPassthroughServiceImplementation(std::string name) {
35    sp<Interface> service = Interface::getService(name, true /* getStub */);
36
37    if (service == nullptr) {
38        ALOGE("Could not get passthrough implementation for %s.", name.c_str());
39        return EXIT_FAILURE;
40    }
41
42    LOG_FATAL_IF(service->isRemote(), "Implementation of %s is remote!", name.c_str());
43
44    status_t status = service->registerAsService(name);
45
46    if (status == OK) {
47        ALOGI("Registration complete for %s.", name.c_str());
48    } else {
49        ALOGE("Could not register service %s (%d).", name.c_str(), status);
50    }
51
52    return status;
53}
54
55/**
56 * Launches the RPC threadpool. This method never returns.
57 *
58 * Return value is exit status.
59 */
60inline int launchRpcServer(size_t maxThreads) {
61    ProcessState::self()->setThreadPoolMaxThreadCount(maxThreads);
62    ProcessState::self()->startThreadPool();
63    IPCThreadState::self()->joinThreadPool();
64
65    return 0;
66}
67
68/**
69 * Creates default passthrough service implementation. This method never returns.
70 *
71 * Return value is exit status.
72 */
73template<class Interface>
74int defaultPassthroughServiceImplementation(std::string name) {
75    registerPassthroughServiceImplementation<Interface>(name);
76    return launchRpcServer(0);
77}
78
79}  // namespace hardware
80}  // namespace android
81
82#endif  // ANDROID_HIDL_LEGACY_SUPPORT_H
83