1/*
2 * Copyright (C) 2017 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 "BootAction.h"
18
19#define LOG_TAG "BootAction"
20
21#include <dlfcn.h>
22
23#include <pio/peripheral_manager_client.h>
24#include <utils/Log.h>
25
26namespace android {
27
28BootAction::~BootAction() {
29    if (mLibHandle != nullptr) {
30        dlclose(mLibHandle);
31    }
32}
33
34bool BootAction::init(const std::string& libraryPath,
35                      const std::vector<ABootActionParameter>& parameters) {
36    APeripheralManagerClient* client = nullptr;
37    ALOGD("Connecting to peripheralmanager");
38    // Wait for peripheral manager to come up.
39    while (client == nullptr) {
40        client = APeripheralManagerClient_new();
41        if (client == nullptr) {
42          ALOGV("peripheralmanager is not up, sleeping before we check again.");
43          usleep(250000);
44        }
45    }
46    ALOGD("Peripheralmanager is up.");
47    APeripheralManagerClient_delete(client);
48
49
50    ALOGI("Loading boot action %s", libraryPath.c_str());
51    mLibHandle = dlopen(libraryPath.c_str(), RTLD_NOW);
52    if (mLibHandle == nullptr) {
53        ALOGE("Unable to load library at %s :: %s",
54              libraryPath.c_str(), dlerror());
55        return false;
56    }
57
58    void* loaded = nullptr;
59    if (!loadSymbol("boot_action_init", &loaded) || loaded == nullptr) {
60        return false;
61    }
62    mLibInit = reinterpret_cast<libInit>(loaded);
63
64    loaded = nullptr;
65    if (!loadSymbol("boot_action_shutdown", &loaded) || loaded == nullptr) {
66        return false;
67    }
68    mLibShutdown = reinterpret_cast<libShutdown>(loaded);
69
70    // StartPart is considered optional, if it isn't exported by the library
71    // we will still call init and shutdown.
72    loaded = nullptr;
73    if (!loadSymbol("boot_action_start_part", &loaded) || loaded == nullptr) {
74        ALOGI("No boot_action_start_part found, action will not be told when "
75              "Animation parts change.");
76    } else {
77        mLibStartPart = reinterpret_cast<libStartPart>(loaded);
78    }
79
80    ALOGD("Entering boot_action_init");
81    bool result = mLibInit(parameters.data(), parameters.size());
82    ALOGD("Returned from boot_action_init");
83    return result;
84}
85
86void BootAction::startPart(int partNumber, int playNumber) {
87    if (mLibStartPart == nullptr) return;
88
89    ALOGD("Entering boot_action_start_part");
90    mLibStartPart(partNumber, playNumber);
91    ALOGD("Returned from boot_action_start_part");
92}
93
94void BootAction::shutdown() {
95    ALOGD("Entering boot_action_shutdown");
96    mLibShutdown();
97    ALOGD("Returned from boot_action_shutdown");
98}
99
100bool BootAction::loadSymbol(const char* symbol, void** loaded) {
101    *loaded = dlsym(mLibHandle, symbol);
102    if (loaded == nullptr) {
103        ALOGE("Unable to load symbol : %s :: %s", symbol, dlerror());
104        return false;
105    }
106    return true;
107}
108
109}  // namespace android
110