1 /*
2 * Copyright (C) 2010 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 "android_native_app_glue.h"
18
19 #include <jni.h>
20
21 #include <errno.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <unistd.h>
25
26 #include <android/log.h>
27
28 #define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "threaded_app", __VA_ARGS__))
29 #define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "threaded_app", __VA_ARGS__))
30
31 /* For debug builds, always enable the debug traces in this library */
32 #ifndef NDEBUG
33 # define LOGV(...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, "threaded_app", __VA_ARGS__))
34 #else
35 # define LOGV(...) ((void)0)
36 #endif
37
free_saved_state(struct android_app * android_app)38 static void free_saved_state(struct android_app* android_app) {
39 pthread_mutex_lock(&android_app->mutex);
40 if (android_app->savedState != NULL) {
41 free(android_app->savedState);
42 android_app->savedState = NULL;
43 android_app->savedStateSize = 0;
44 }
45 pthread_mutex_unlock(&android_app->mutex);
46 }
47
android_app_read_cmd(struct android_app * android_app)48 int8_t android_app_read_cmd(struct android_app* android_app) {
49 int8_t cmd;
50 if (read(android_app->msgread, &cmd, sizeof(cmd)) != sizeof(cmd)) {
51 LOGE("No data on command pipe!");
52 return -1;
53 }
54 if (cmd == APP_CMD_SAVE_STATE) free_saved_state(android_app);
55 return cmd;
56 }
57
print_cur_config(struct android_app * android_app)58 static void print_cur_config(struct android_app* android_app) {
59 char lang[2], country[2];
60 AConfiguration_getLanguage(android_app->config, lang);
61 AConfiguration_getCountry(android_app->config, country);
62
63 LOGV("Config: mcc=%d mnc=%d lang=%c%c cnt=%c%c orien=%d touch=%d dens=%d "
64 "keys=%d nav=%d keysHid=%d navHid=%d sdk=%d size=%d long=%d "
65 "modetype=%d modenight=%d",
66 AConfiguration_getMcc(android_app->config),
67 AConfiguration_getMnc(android_app->config),
68 lang[0], lang[1], country[0], country[1],
69 AConfiguration_getOrientation(android_app->config),
70 AConfiguration_getTouchscreen(android_app->config),
71 AConfiguration_getDensity(android_app->config),
72 AConfiguration_getKeyboard(android_app->config),
73 AConfiguration_getNavigation(android_app->config),
74 AConfiguration_getKeysHidden(android_app->config),
75 AConfiguration_getNavHidden(android_app->config),
76 AConfiguration_getSdkVersion(android_app->config),
77 AConfiguration_getScreenSize(android_app->config),
78 AConfiguration_getScreenLong(android_app->config),
79 AConfiguration_getUiModeType(android_app->config),
80 AConfiguration_getUiModeNight(android_app->config));
81 }
82
android_app_pre_exec_cmd(struct android_app * android_app,int8_t cmd)83 void android_app_pre_exec_cmd(struct android_app* android_app, int8_t cmd) {
84 switch (cmd) {
85 case APP_CMD_INPUT_CHANGED:
86 LOGV("APP_CMD_INPUT_CHANGED");
87 pthread_mutex_lock(&android_app->mutex);
88 if (android_app->inputQueue != NULL) {
89 AInputQueue_detachLooper(android_app->inputQueue);
90 }
91 android_app->inputQueue = android_app->pendingInputQueue;
92 if (android_app->inputQueue != NULL) {
93 LOGV("Attaching input queue to looper");
94 AInputQueue_attachLooper(android_app->inputQueue,
95 android_app->looper, LOOPER_ID_INPUT, NULL,
96 &android_app->inputPollSource);
97 }
98 pthread_cond_broadcast(&android_app->cond);
99 pthread_mutex_unlock(&android_app->mutex);
100 break;
101
102 case APP_CMD_INIT_WINDOW:
103 LOGV("APP_CMD_INIT_WINDOW");
104 pthread_mutex_lock(&android_app->mutex);
105 android_app->window = android_app->pendingWindow;
106 pthread_cond_broadcast(&android_app->cond);
107 pthread_mutex_unlock(&android_app->mutex);
108 break;
109
110 case APP_CMD_TERM_WINDOW:
111 LOGV("APP_CMD_TERM_WINDOW");
112 pthread_cond_broadcast(&android_app->cond);
113 break;
114
115 case APP_CMD_RESUME:
116 case APP_CMD_START:
117 case APP_CMD_PAUSE:
118 case APP_CMD_STOP:
119 LOGV("activityState=%d", cmd);
120 pthread_mutex_lock(&android_app->mutex);
121 android_app->activityState = cmd;
122 pthread_cond_broadcast(&android_app->cond);
123 pthread_mutex_unlock(&android_app->mutex);
124 break;
125
126 case APP_CMD_CONFIG_CHANGED:
127 LOGV("APP_CMD_CONFIG_CHANGED");
128 AConfiguration_fromAssetManager(android_app->config,
129 android_app->activity->assetManager);
130 print_cur_config(android_app);
131 break;
132
133 case APP_CMD_DESTROY:
134 LOGV("APP_CMD_DESTROY");
135 android_app->destroyRequested = 1;
136 break;
137 }
138 }
139
android_app_post_exec_cmd(struct android_app * android_app,int8_t cmd)140 void android_app_post_exec_cmd(struct android_app* android_app, int8_t cmd) {
141 switch (cmd) {
142 case APP_CMD_TERM_WINDOW:
143 LOGV("APP_CMD_TERM_WINDOW");
144 pthread_mutex_lock(&android_app->mutex);
145 android_app->window = NULL;
146 pthread_cond_broadcast(&android_app->cond);
147 pthread_mutex_unlock(&android_app->mutex);
148 break;
149
150 case APP_CMD_SAVE_STATE:
151 LOGV("APP_CMD_SAVE_STATE");
152 pthread_mutex_lock(&android_app->mutex);
153 android_app->stateSaved = 1;
154 pthread_cond_broadcast(&android_app->cond);
155 pthread_mutex_unlock(&android_app->mutex);
156 break;
157
158 case APP_CMD_RESUME:
159 free_saved_state(android_app);
160 break;
161 }
162 }
163
app_dummy()164 void app_dummy() {
165 }
166
android_app_destroy(struct android_app * android_app)167 static void android_app_destroy(struct android_app* android_app) {
168 LOGV("android_app_destroy!");
169 free_saved_state(android_app);
170 pthread_mutex_lock(&android_app->mutex);
171 if (android_app->inputQueue != NULL) {
172 AInputQueue_detachLooper(android_app->inputQueue);
173 }
174 AConfiguration_delete(android_app->config);
175 android_app->destroyed = 1;
176 pthread_cond_broadcast(&android_app->cond);
177 pthread_mutex_unlock(&android_app->mutex);
178 // Can't touch android_app object after this.
179 }
180
process_input(struct android_app * app,struct android_poll_source * source)181 static void process_input(struct android_app* app, struct android_poll_source* source) {
182 AInputEvent* event = NULL;
183 while (AInputQueue_getEvent(app->inputQueue, &event) >= 0) {
184 LOGV("New input event: type=%d", AInputEvent_getType(event));
185 if (AInputQueue_preDispatchEvent(app->inputQueue, event)) {
186 continue;
187 }
188 int32_t handled = 0;
189 if (app->onInputEvent != NULL) handled = app->onInputEvent(app, event);
190 AInputQueue_finishEvent(app->inputQueue, event, handled);
191 }
192 }
193
process_cmd(struct android_app * app,struct android_poll_source * source)194 static void process_cmd(struct android_app* app, struct android_poll_source* source) {
195 int8_t cmd = android_app_read_cmd(app);
196 android_app_pre_exec_cmd(app, cmd);
197 if (app->onAppCmd != NULL) app->onAppCmd(app, cmd);
198 android_app_post_exec_cmd(app, cmd);
199 }
200
android_app_entry(void * param)201 static void* android_app_entry(void* param) {
202 struct android_app* android_app = (struct android_app*)param;
203
204 android_app->config = AConfiguration_new();
205 AConfiguration_fromAssetManager(android_app->config, android_app->activity->assetManager);
206
207 print_cur_config(android_app);
208
209 android_app->cmdPollSource.id = LOOPER_ID_MAIN;
210 android_app->cmdPollSource.app = android_app;
211 android_app->cmdPollSource.process = process_cmd;
212 android_app->inputPollSource.id = LOOPER_ID_INPUT;
213 android_app->inputPollSource.app = android_app;
214 android_app->inputPollSource.process = process_input;
215
216 ALooper* looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);
217 ALooper_addFd(looper, android_app->msgread, LOOPER_ID_MAIN, ALOOPER_EVENT_INPUT, NULL,
218 &android_app->cmdPollSource);
219 android_app->looper = looper;
220
221 pthread_mutex_lock(&android_app->mutex);
222 android_app->running = 1;
223 pthread_cond_broadcast(&android_app->cond);
224 pthread_mutex_unlock(&android_app->mutex);
225
226 android_main(android_app);
227
228 android_app_destroy(android_app);
229 return NULL;
230 }
231
232 // --------------------------------------------------------------------
233 // Native activity interaction (called from main thread)
234 // --------------------------------------------------------------------
235
android_app_create(ANativeActivity * activity,void * savedState,size_t savedStateSize)236 static struct android_app* android_app_create(ANativeActivity* activity,
237 void* savedState, size_t savedStateSize) {
238 struct android_app* android_app = calloc(1, sizeof(struct android_app));
239 android_app->activity = activity;
240
241 pthread_mutex_init(&android_app->mutex, NULL);
242 pthread_cond_init(&android_app->cond, NULL);
243
244 if (savedState != NULL) {
245 android_app->savedState = malloc(savedStateSize);
246 android_app->savedStateSize = savedStateSize;
247 memcpy(android_app->savedState, savedState, savedStateSize);
248 }
249
250 int msgpipe[2];
251 if (pipe(msgpipe)) {
252 LOGE("could not create pipe: %s", strerror(errno));
253 return NULL;
254 }
255 android_app->msgread = msgpipe[0];
256 android_app->msgwrite = msgpipe[1];
257
258 pthread_attr_t attr;
259 pthread_attr_init(&attr);
260 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
261 pthread_create(&android_app->thread, &attr, android_app_entry, android_app);
262
263 // Wait for thread to start.
264 pthread_mutex_lock(&android_app->mutex);
265 while (!android_app->running) {
266 pthread_cond_wait(&android_app->cond, &android_app->mutex);
267 }
268 pthread_mutex_unlock(&android_app->mutex);
269
270 return android_app;
271 }
272
android_app_write_cmd(struct android_app * android_app,int8_t cmd)273 static void android_app_write_cmd(struct android_app* android_app, int8_t cmd) {
274 if (write(android_app->msgwrite, &cmd, sizeof(cmd)) != sizeof(cmd)) {
275 LOGE("Failure writing android_app cmd: %s", strerror(errno));
276 }
277 }
278
android_app_set_input(struct android_app * android_app,AInputQueue * inputQueue)279 static void android_app_set_input(struct android_app* android_app, AInputQueue* inputQueue) {
280 pthread_mutex_lock(&android_app->mutex);
281 android_app->pendingInputQueue = inputQueue;
282 android_app_write_cmd(android_app, APP_CMD_INPUT_CHANGED);
283 while (android_app->inputQueue != android_app->pendingInputQueue) {
284 pthread_cond_wait(&android_app->cond, &android_app->mutex);
285 }
286 pthread_mutex_unlock(&android_app->mutex);
287 }
288
android_app_set_window(struct android_app * android_app,ANativeWindow * window)289 static void android_app_set_window(struct android_app* android_app, ANativeWindow* window) {
290 pthread_mutex_lock(&android_app->mutex);
291 if (android_app->pendingWindow != NULL) {
292 android_app_write_cmd(android_app, APP_CMD_TERM_WINDOW);
293 }
294 android_app->pendingWindow = window;
295 if (window != NULL) {
296 android_app_write_cmd(android_app, APP_CMD_INIT_WINDOW);
297 }
298 while (android_app->window != android_app->pendingWindow) {
299 pthread_cond_wait(&android_app->cond, &android_app->mutex);
300 }
301 pthread_mutex_unlock(&android_app->mutex);
302 }
303
android_app_set_activity_state(struct android_app * android_app,int8_t cmd)304 static void android_app_set_activity_state(struct android_app* android_app, int8_t cmd) {
305 pthread_mutex_lock(&android_app->mutex);
306 android_app_write_cmd(android_app, cmd);
307 while (android_app->activityState != cmd) {
308 pthread_cond_wait(&android_app->cond, &android_app->mutex);
309 }
310 pthread_mutex_unlock(&android_app->mutex);
311 }
312
android_app_free(struct android_app * android_app)313 static void android_app_free(struct android_app* android_app) {
314 pthread_mutex_lock(&android_app->mutex);
315 android_app_write_cmd(android_app, APP_CMD_DESTROY);
316 while (!android_app->destroyed) {
317 pthread_cond_wait(&android_app->cond, &android_app->mutex);
318 }
319 pthread_mutex_unlock(&android_app->mutex);
320
321 close(android_app->msgread);
322 close(android_app->msgwrite);
323 pthread_cond_destroy(&android_app->cond);
324 pthread_mutex_destroy(&android_app->mutex);
325 free(android_app);
326 }
327
ToApp(ANativeActivity * activity)328 static struct android_app* ToApp(ANativeActivity* activity) {
329 return (struct android_app*) activity->instance;
330 }
331
onDestroy(ANativeActivity * activity)332 static void onDestroy(ANativeActivity* activity) {
333 LOGV("Destroy: %p", activity);
334 android_app_free(ToApp(activity));
335 }
336
onStart(ANativeActivity * activity)337 static void onStart(ANativeActivity* activity) {
338 LOGV("Start: %p", activity);
339 android_app_set_activity_state(ToApp(activity), APP_CMD_START);
340 }
341
onResume(ANativeActivity * activity)342 static void onResume(ANativeActivity* activity) {
343 LOGV("Resume: %p", activity);
344 android_app_set_activity_state(ToApp(activity), APP_CMD_RESUME);
345 }
346
onSaveInstanceState(ANativeActivity * activity,size_t * outLen)347 static void* onSaveInstanceState(ANativeActivity* activity, size_t* outLen) {
348 LOGV("SaveInstanceState: %p", activity);
349
350 struct android_app* android_app = ToApp(activity);
351 void* savedState = NULL;
352 pthread_mutex_lock(&android_app->mutex);
353 android_app->stateSaved = 0;
354 android_app_write_cmd(android_app, APP_CMD_SAVE_STATE);
355 while (!android_app->stateSaved) {
356 pthread_cond_wait(&android_app->cond, &android_app->mutex);
357 }
358
359 if (android_app->savedState != NULL) {
360 savedState = android_app->savedState;
361 *outLen = android_app->savedStateSize;
362 android_app->savedState = NULL;
363 android_app->savedStateSize = 0;
364 }
365
366 pthread_mutex_unlock(&android_app->mutex);
367
368 return savedState;
369 }
370
onPause(ANativeActivity * activity)371 static void onPause(ANativeActivity* activity) {
372 LOGV("Pause: %p", activity);
373 android_app_set_activity_state(ToApp(activity), APP_CMD_PAUSE);
374 }
375
onStop(ANativeActivity * activity)376 static void onStop(ANativeActivity* activity) {
377 LOGV("Stop: %p", activity);
378 android_app_set_activity_state(ToApp(activity), APP_CMD_STOP);
379 }
380
onConfigurationChanged(ANativeActivity * activity)381 static void onConfigurationChanged(ANativeActivity* activity) {
382 LOGV("ConfigurationChanged: %p", activity);
383 android_app_write_cmd(ToApp(activity), APP_CMD_CONFIG_CHANGED);
384 }
385
onContentRectChanged(ANativeActivity * activity,const ARect * r)386 static void onContentRectChanged(ANativeActivity* activity, const ARect* r) {
387 LOGV("ContentRectChanged: l=%d,t=%d,r=%d,b=%d", r->left, r->top, r->right, r->bottom);
388 struct android_app* android_app = ToApp(activity);
389 pthread_mutex_lock(&android_app->mutex);
390 android_app->contentRect = *r;
391 pthread_mutex_unlock(&android_app->mutex);
392 android_app_write_cmd(ToApp(activity), APP_CMD_CONTENT_RECT_CHANGED);
393 }
394
onLowMemory(ANativeActivity * activity)395 static void onLowMemory(ANativeActivity* activity) {
396 LOGV("LowMemory: %p", activity);
397 android_app_write_cmd(ToApp(activity), APP_CMD_LOW_MEMORY);
398 }
399
onWindowFocusChanged(ANativeActivity * activity,int focused)400 static void onWindowFocusChanged(ANativeActivity* activity, int focused) {
401 LOGV("WindowFocusChanged: %p -- %d", activity, focused);
402 android_app_write_cmd(ToApp(activity), focused ? APP_CMD_GAINED_FOCUS : APP_CMD_LOST_FOCUS);
403 }
404
onNativeWindowCreated(ANativeActivity * activity,ANativeWindow * window)405 static void onNativeWindowCreated(ANativeActivity* activity, ANativeWindow* window) {
406 LOGV("NativeWindowCreated: %p -- %p", activity, window);
407 android_app_set_window(ToApp(activity), window);
408 }
409
onNativeWindowDestroyed(ANativeActivity * activity,ANativeWindow * window)410 static void onNativeWindowDestroyed(ANativeActivity* activity, ANativeWindow* window) {
411 LOGV("NativeWindowDestroyed: %p -- %p", activity, window);
412 android_app_set_window(ToApp(activity), NULL);
413 }
414
onNativeWindowRedrawNeeded(ANativeActivity * activity,ANativeWindow * window)415 static void onNativeWindowRedrawNeeded(ANativeActivity* activity, ANativeWindow* window) {
416 LOGV("NativeWindowRedrawNeeded: %p -- %p", activity, window);
417 android_app_write_cmd(ToApp(activity), APP_CMD_WINDOW_REDRAW_NEEDED);
418 }
419
onNativeWindowResized(ANativeActivity * activity,ANativeWindow * window)420 static void onNativeWindowResized(ANativeActivity* activity, ANativeWindow* window) {
421 LOGV("NativeWindowResized: %p -- %p", activity, window);
422 android_app_write_cmd(ToApp(activity), APP_CMD_WINDOW_RESIZED);
423 }
424
onInputQueueCreated(ANativeActivity * activity,AInputQueue * queue)425 static void onInputQueueCreated(ANativeActivity* activity, AInputQueue* queue) {
426 LOGV("InputQueueCreated: %p -- %p", activity, queue);
427 android_app_set_input(ToApp(activity), queue);
428 }
429
onInputQueueDestroyed(ANativeActivity * activity,AInputQueue * queue)430 static void onInputQueueDestroyed(ANativeActivity* activity, AInputQueue* queue) {
431 LOGV("InputQueueDestroyed: %p -- %p", activity, queue);
432 android_app_set_input(ToApp(activity), NULL);
433 }
434
435 JNIEXPORT
ANativeActivity_onCreate(ANativeActivity * activity,void * savedState,size_t savedStateSize)436 void ANativeActivity_onCreate(ANativeActivity* activity, void* savedState, size_t savedStateSize) {
437 LOGV("Creating: %p", activity);
438
439 activity->callbacks->onConfigurationChanged = onConfigurationChanged;
440 activity->callbacks->onContentRectChanged = onContentRectChanged;
441 activity->callbacks->onDestroy = onDestroy;
442 activity->callbacks->onInputQueueCreated = onInputQueueCreated;
443 activity->callbacks->onInputQueueDestroyed = onInputQueueDestroyed;
444 activity->callbacks->onLowMemory = onLowMemory;
445 activity->callbacks->onNativeWindowCreated = onNativeWindowCreated;
446 activity->callbacks->onNativeWindowDestroyed = onNativeWindowDestroyed;
447 activity->callbacks->onNativeWindowRedrawNeeded = onNativeWindowRedrawNeeded;
448 activity->callbacks->onNativeWindowResized = onNativeWindowResized;
449 activity->callbacks->onPause = onPause;
450 activity->callbacks->onResume = onResume;
451 activity->callbacks->onSaveInstanceState = onSaveInstanceState;
452 activity->callbacks->onStart = onStart;
453 activity->callbacks->onStop = onStop;
454 activity->callbacks->onWindowFocusChanged = onWindowFocusChanged;
455
456 activity->instance = android_app_create(activity, savedState, savedStateSize);
457 }
458