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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 "chre/core/event_loop_manager.h"
18 
19 #include "chre/platform/fatal_error.h"
20 #include "chre/platform/memory.h"
21 #include "chre/util/lock_guard.h"
22 
23 namespace chre {
24 
freeEventDataCallback(uint16_t,void * eventData)25 void freeEventDataCallback(uint16_t /*eventType*/, void *eventData) {
26   memoryFree(eventData);
27 }
28 
validateChreApiCall(const char * functionName)29 Nanoapp *EventLoopManager::validateChreApiCall(const char *functionName) {
30   chre::Nanoapp *currentNanoapp = EventLoopManagerSingleton::get()
31       ->getEventLoop().getCurrentNanoapp();
32   CHRE_ASSERT_LOG(currentNanoapp, "%s called with no CHRE app context",
33                   functionName);
34   return currentNanoapp;
35 }
36 
debugDump()37 UniquePtr<char> EventLoopManager::debugDump() {
38   constexpr size_t kDebugStringSize = 4096;
39   char *debugStr = static_cast<char *>(memoryAlloc(kDebugStringSize));
40   if (debugStr != nullptr) {
41     size_t debugStrPos = 0;
42     if (!mMemoryManager.logStateToBuffer(debugStr, &debugStrPos,
43                                          kDebugStringSize)) {
44       LOGE("Memory manager debug dump failed.");
45     } else if (!mEventLoop.logStateToBuffer(debugStr, &debugStrPos,
46                                             kDebugStringSize)) {
47       LOGE("Event loop debug dump failed.");
48     } else if (!mSensorRequestManager.logStateToBuffer(debugStr, &debugStrPos,
49                                                        kDebugStringSize)) {
50       LOGE("Sensor request manager debug dump failed.");
51     } else if (!mGnssManager.logStateToBuffer(debugStr, &debugStrPos,
52                                               kDebugStringSize)) {
53       LOGE("GNSS manager debug dump failed.");
54     } else if (!mWifiRequestManager.logStateToBuffer(debugStr, &debugStrPos,
55                                                      kDebugStringSize)) {
56       LOGE("Wifi request manager debug dump failed.");
57     } else if (!mWwanRequestManager.logStateToBuffer(debugStr, &debugStrPos,
58                                                      kDebugStringSize)) {
59       LOGE("WWAN request manager debug dump failed.");
60     }
61     LOGD("Debug dump used %zu bytes of log buffer", debugStrPos);
62   }
63 
64   return UniquePtr<char>(debugStr);
65 }
66 
getNextInstanceId()67 uint32_t EventLoopManager::getNextInstanceId() {
68   ++mLastInstanceId;
69 
70   // ~4 billion instance IDs should be enough for anyone... if we need to
71   // support wraparound for stress testing load/unload, then we can set a flag
72   // when wraparound occurs and use EventLoop::findNanoappByInstanceId to ensure
73   // we avoid conflicts
74   if (mLastInstanceId == kBroadcastInstanceId
75       || mLastInstanceId == kSystemInstanceId) {
76     FATAL_ERROR("Exhausted instance IDs!");
77   }
78 
79   return mLastInstanceId;
80 }
81 
lateInit()82 void EventLoopManager::lateInit() {
83   mGnssManager.init();
84   mWifiRequestManager.init();
85   mWwanRequestManager.init();
86 
87 #ifdef CHRE_AUDIO_SUPPORT_ENABLED
88   mAudioRequestManager.init();
89 #endif  // CHRE_AUDIO_SUPPORT_ENABLED
90 }
91 
92 // Explicitly instantiate the EventLoopManagerSingleton to reduce codesize.
93 template class Singleton<EventLoopManager>;
94 
95 }  // namespace chre
96