1 /*
2 * Copyright (C) 2018 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.h>
18
19 #include "chre/util/nanoapp/log.h"
20
21 #define LOG_TAG "[HostAwakeWorld]"
22
23 /**
24 * A nanoapp that sets a periodic timer to send broadcast messages to the host
25 * only if it is awake.
26 */
27
28 #ifdef CHRE_NANOAPP_INTERNAL
29 namespace chre {
30 namespace {
31 #endif // CHRE_NANOAPP_INTERNAL
32
33 uint8_t gMessageBuffer[] = {0, 1, 2, 3, 4};
34
35 uint32_t gMessageTimerHandle;
36
nanoappStart()37 bool nanoappStart() {
38 LOGI("Host awake world start");
39 gMessageTimerHandle = chreTimerSet(5000000 /* 5 ms */,
40 &gMessageTimerHandle,
41 false /* oneShot */);
42 chreConfigureHostSleepStateEvents(true /* enable */);
43
44 return (gMessageTimerHandle != CHRE_TIMER_INVALID);
45 }
46
handleTimerEvent(const void * eventData)47 void handleTimerEvent(const void *eventData) {
48 const uint32_t *timerHandle = static_cast<const uint32_t *>(eventData);
49 if (*timerHandle == gMessageTimerHandle) {
50 if (chreIsHostAwake()) {
51 chreSendMessageToHostEndpoint(
52 gMessageBuffer, sizeof(gMessageBuffer), 1234 /* messageType */,
53 CHRE_HOST_ENDPOINT_BROADCAST, nullptr /* freeCallback */);
54 }
55 } else {
56 LOGE("Received unexpected timer event");
57 }
58 }
59
nanoappHandleEvent(uint32_t senderInstanceId,uint16_t eventType,const void * eventData)60 void nanoappHandleEvent(uint32_t senderInstanceId,
61 uint16_t eventType,
62 const void *eventData) {
63 switch (eventType) {
64 case CHRE_EVENT_TIMER:
65 handleTimerEvent(eventData);
66 break;
67 case CHRE_EVENT_HOST_AWAKE:
68 LOGI("Received host awake event");
69 break;
70 case CHRE_EVENT_HOST_ASLEEP:
71 LOGI("Received host asleep event");
72 break;
73 default:
74 LOGW("Unknown event received");
75 break;
76 }
77 }
78
nanoappEnd()79 void nanoappEnd() {
80 LOGI("Host awake world end");
81 }
82
83 #ifdef CHRE_NANOAPP_INTERNAL
84 } // anonymous namespace
85 } // namespace chre
86
87 #include "chre/util/nanoapp/app_id.h"
88 #include "chre/platform/static_nanoapp_init.h"
89
90 CHRE_STATIC_NANOAPP_INIT(HostAwakeWorld, chre::kHostAwakeWorldAppId, 0);
91 #endif // CHRE_NANOAPP_INTERNAL
92