android_native_app_glue—c

/*

* Copyright (C) 2010 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* https://www.360docs.net/doc/9e6575262.html,/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*

*/

#include

#include

#include

#include

#include

#include "android_native_app_glue.h"

#include

#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "threaded_app", __V A_ARGS__))

#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "threaded_app", __V A_ARGS__))

/* For debug builds, always enable the debug traces in this library */

#ifndef NDEBUG

# define LOGV(...) ((void)__android_log_print(ANDROID_LOG_VERBOSE, "threaded_app", __V A_ARGS__))

#else

# define LOGV(...) ((void)0)

#endif

static void free_saved_state(struct android_app* android_app) {

pthread_mutex_lock(&android_app->mutex);

if (android_app->savedState != NULL) {

free(android_app->savedState);

android_app->savedState = NULL;

android_app->savedStateSize = 0;

}

pthread_mutex_unlock(&android_app->mutex);

}

int8_t android_app_read_cmd(struct android_app* android_app) {

int8_t cmd;

if (read(android_app->msgread, &cmd, sizeof(cmd)) == sizeof(cmd)) {

switch (cmd) {

case APP_CMD_SA VE_STATE:

free_saved_state(android_app);

break;

}

return cmd;

} else {

LOGE("No data on command pipe!");

}

return -1;

}

static void print_cur_config(struct android_app* android_app) {

char lang[2], country[2];

AConfiguration_getLanguage(android_app->config, lang);

AConfiguration_getCountry(android_app->config, country);

LOGV("Config: mcc=%d mnc=%d lang=%c%c cnt=%c%c orien=%d touch=%d dens=%d "

"keys=%d nav=%d keysHid=%d navHid=%d sdk=%d size=%d long=%d "

"modetype=%d modenight=%d",

AConfiguration_getMcc(android_app->config),

AConfiguration_getMnc(android_app->config),

lang[0], lang[1], country[0], country[1],

AConfiguration_getOrientation(android_app->config),

AConfiguration_getTouchscreen(android_app->config),

AConfiguration_getDensity(android_app->config),

AConfiguration_getKeyboard(android_app->config),

AConfiguration_getNavigation(android_app->config),

AConfiguration_getKeysHidden(android_app->config),

AConfiguration_getNavHidden(android_app->config),

AConfiguration_getSdkVersion(android_app->config),

AConfiguration_getScreenSize(android_app->config),

AConfiguration_getScreenLong(android_app->config),

AConfiguration_getUiModeType(android_app->config),

AConfiguration_getUiModeNight(android_app->config));

}

void android_app_pre_exec_cmd(struct android_app* android_app, int8_t cmd) { switch (cmd) {

case APP_CMD_INPUT_CHANGED:

LOGV("APP_CMD_INPUT_CHANGED\n");

pthread_mutex_lock(&android_app->mutex);

if (android_app->inputQueue != NULL) {

AInputQueue_detachLooper(android_app->inputQueue);

}

android_app->inputQueue = android_app->pendingInputQueue;

if (android_app->inputQueue != NULL) {

LOGV("Attaching input queue to looper");

AInputQueue_attachLooper(android_app->inputQueue,

android_app->looper, LOOPER_ID_INPUT, NULL,

&android_app->inputPollSource);

}

pthread_cond_broadcast(&android_app->cond);

break;

case APP_CMD_INIT_WINDOW:

LOGV("APP_CMD_INIT_WINDOW\n");

pthread_mutex_lock(&android_app->mutex);

android_app->window = android_app->pendingWindow;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

break;

case APP_CMD_TERM_WINDOW:

LOGV("APP_CMD_TERM_WINDOW\n");

pthread_cond_broadcast(&android_app->cond);

break;

case APP_CMD_RESUME:

case APP_CMD_START:

case APP_CMD_PAUSE:

case APP_CMD_STOP:

LOGV("activityState=%d\n", cmd);

pthread_mutex_lock(&android_app->mutex);

android_app->activityState = cmd;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

break;

case APP_CMD_CONFIG_CHANGED:

LOGV("APP_CMD_CONFIG_CHANGED\n");

AConfiguration_fromAssetManager(android_app->config,

android_app->activity->assetManager);

print_cur_config(android_app);

break;

case APP_CMD_DESTROY:

LOGV("APP_CMD_DESTROY\n");

android_app->destroyRequested = 1;

break;

}

}

void android_app_post_exec_cmd(struct android_app* android_app, int8_t cmd) { switch (cmd) {

case APP_CMD_TERM_WINDOW:

LOGV("APP_CMD_TERM_WINDOW\n");

pthread_mutex_lock(&android_app->mutex);

android_app->window = NULL;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

break;

case APP_CMD_SA VE_STA TE:

LOGV("APP_CMD_SA VE_STATE\n");

android_app->stateSaved = 1;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

break;

case APP_CMD_RESUME:

free_saved_state(android_app);

break;

}

}

void app_dummy() {

}

static void android_app_destroy(struct android_app* android_app) {

LOGV("android_app_destroy!");

free_saved_state(android_app);

pthread_mutex_lock(&android_app->mutex);

if (android_app->inputQueue != NULL) {

AInputQueue_detachLooper(android_app->inputQueue);

}

AConfiguration_delete(android_app->config);

android_app->destroyed = 1;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

// Can't touch android_app object after this.

}

static void process_input(struct android_app* app, struct android_poll_source* source) { AInputEvent* event = NULL;

int processed = 0;

while (AInputQueue_getEvent(app->inputQueue, &event) >= 0) {

LOGV("New input event: type=%d\n", AInputEvent_getType(event));

if (AInputQueue_preDispatchEvent(app->inputQueue, event)) {

continue;

}

int32_t handled = 0;

if (app->onInputEvent != NULL) handled = app->onInputEvent(app, event);

AInputQueue_finishEvent(app->inputQueue, event, handled);

processed = 1;

}

if (processed == 0) {

LOGE("Failure reading next input event: %s\n", strerror(errno));

}

}

static void process_cmd(struct android_app* app, struct android_poll_source* source) { int8_t cmd = android_app_read_cmd(app);

android_app_pre_exec_cmd(app, cmd);

if (app->onAppCmd != NULL) app->onAppCmd(app, cmd);

android_app_post_exec_cmd(app, cmd);

static void* android_app_entry(void* param) {

struct android_app* android_app = (struct android_app*)param;

android_app->config = AConfiguration_new();

AConfiguration_fromAssetManager(android_app->config,

android_app->activity->assetManager);

print_cur_config(android_app);

android_app->cmdPollSource.id = LOOPER_ID_MAIN;

android_app->cmdPollSource.app = android_app;

android_app->cmdPollSource.process = process_cmd;

android_app->inputPollSource.id = LOOPER_ID_INPUT;

android_app->inputPollSource.app = android_app;

android_app->inputPollSource.process = process_input;

ALooper* looper = ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);

ALooper_addFd(looper, android_app->msgread, LOOPER_ID_MAIN, ALOOPER_EVENT_INPUT, NULL,

&android_app->cmdPollSource);

android_app->looper = looper;

pthread_mutex_lock(&android_app->mutex);

android_app->running = 1;

pthread_cond_broadcast(&android_app->cond);

pthread_mutex_unlock(&android_app->mutex);

android_main(android_app);

android_app_destroy(android_app);

return NULL;

}

// --------------------------------------------------------------------

// Native activity interaction (called from main thread)

// --------------------------------------------------------------------

static struct android_app* android_app_create(ANativeActivity* activity,

void* savedState, size_t savedStateSize) {

struct android_app* android_app = (struct android_app*)malloc(sizeof(struct android_app));

memset(android_app, 0, sizeof(struct android_app));

android_app->activity = activity;

pthread_mutex_init(&android_app->mutex, NULL);

pthread_cond_init(&android_app->cond, NULL);

if (savedState != NULL) {

android_app->savedState = malloc(savedStateSize);

android_app->savedStateSize = savedStateSize;

memcpy(android_app->savedState, savedState, savedStateSize);

}

int msgpipe[2];

if (pipe(msgpipe)) {

LOGE("could not create pipe: %s", strerror(errno));

return NULL;

}

android_app->msgread = msgpipe[0];

android_app->msgwrite = msgpipe[1];

pthread_attr_t attr;

pthread_attr_init(&attr);

pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);

pthread_create(&android_app->thread, &attr, android_app_entry, android_app);

// Wait for thread to start.

pthread_mutex_lock(&android_app->mutex);

while (!android_app->running) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

pthread_mutex_unlock(&android_app->mutex);

return android_app;

}

static void android_app_write_cmd(struct android_app* android_app, int8_t cmd) { if (write(android_app->msgwrite, &cmd, sizeof(cmd)) != sizeof(cmd)) {

LOGE("Failure writing android_app cmd: %s\n", strerror(errno));

}

}

static void android_app_set_input(struct android_app* android_app, AInputQueue* inputQueue) { pthread_mutex_lock(&android_app->mutex);

android_app->pendingInputQueue = inputQueue;

android_app_write_cmd(android_app, APP_CMD_INPUT_CHANGED);

while (android_app->inputQueue != android_app->pendingInputQueue) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

pthread_mutex_unlock(&android_app->mutex);

}

static void android_app_set_window(struct android_app* android_app, ANativeWindow* window) { pthread_mutex_lock(&android_app->mutex);

if (android_app->pendingWindow != NULL) {

android_app_write_cmd(android_app, APP_CMD_TERM_WINDOW);

}

android_app->pendingWindow = window;

if (window != NULL) {

android_app_write_cmd(android_app, APP_CMD_INIT_WINDOW);

}

while (android_app->window != android_app->pendingWindow) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

pthread_mutex_unlock(&android_app->mutex);

static void android_app_set_activity_state(struct android_app* android_app, int8_t cmd) { pthread_mutex_lock(&android_app->mutex);

android_app_write_cmd(android_app, cmd);

while (android_app->activityState != cmd) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

pthread_mutex_unlock(&android_app->mutex);

}

static void android_app_free(struct android_app* android_app) {

pthread_mutex_lock(&android_app->mutex);

android_app_write_cmd(android_app, APP_CMD_DESTROY);

while (!android_app->destroyed) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

pthread_mutex_unlock(&android_app->mutex);

close(android_app->msgread);

close(android_app->msgwrite);

pthread_cond_destroy(&android_app->cond);

pthread_mutex_destroy(&android_app->mutex);

free(android_app);

}

static void onDestroy(ANativeActivity* activity) {

LOGV("Destroy: %p\n", activity);

android_app_free((struct android_app*)activity->instance);

}

static void onStart(ANativeActivity* activity) {

LOGV("Start: %p\n", activity);

android_app_set_activity_state((struct android_app*)activity->instance, APP_CMD_START); }

static void onResume(ANativeActivity* activity) {

LOGV("Resume: %p\n", activity);

android_app_set_activity_state((struct android_app*)activity->instance, APP_CMD_RESUME); }

static void* onSaveInstanceState(ANativeActivity* activity, size_t* outLen) {

struct android_app* android_app = (struct android_app*)activity->instance;

void* savedState = NULL;

LOGV("SaveInstanceState: %p\n", activity);

pthread_mutex_lock(&android_app->mutex);

android_app->stateSaved = 0;

android_app_write_cmd(android_app, APP_CMD_SA VE_STATE);

while (!android_app->stateSaved) {

pthread_cond_wait(&android_app->cond, &android_app->mutex);

}

if (android_app->savedState != NULL) {

savedState = android_app->savedState;

*outLen = android_app->savedStateSize;

android_app->savedState = NULL;

android_app->savedStateSize = 0;

}

pthread_mutex_unlock(&android_app->mutex);

return savedState;

}

static void onPause(ANativeActivity* activity) {

LOGV("Pause: %p\n", activity);

android_app_set_activity_state((struct android_app*)activity->instance, APP_CMD_PAUSE); }

static void onStop(ANativeActivity* activity) {

LOGV("Stop: %p\n", activity);

android_app_set_activity_state((struct android_app*)activity->instance, APP_CMD_STOP); }

static void onConfigurationChanged(ANativeActivity* activity) {

struct android_app* android_app = (struct android_app*)activity->instance;

LOGV("ConfigurationChanged: %p\n", activity);

android_app_write_cmd(android_app, APP_CMD_CONFIG_CHANGED);

}

static void onLowMemory(ANativeActivity* activity) {

struct android_app* android_app = (struct android_app*)activity->instance;

LOGV("LowMemory: %p\n", activity);

android_app_write_cmd(android_app, APP_CMD_LOW_MEMORY);

}

static void onWindowFocusChanged(ANativeActivity* activity, int focused) {

LOGV("WindowFocusChanged: %p -- %d\n", activity, focused);

android_app_write_cmd((struct android_app*)activity->instance,

focused ? APP_CMD_GAINED_FOCUS : APP_CMD_LOST_FOCUS);

}

static void onNativeWindowCreated(ANativeActivity* activity, ANativeWindow* window) { LOGV("NativeWindowCreated: %p -- %p\n", activity, window);

android_app_set_window((struct android_app*)activity->instance, window);

}

static void onNativeWindowDestroyed(ANativeActivity* activity, ANativeWindow* window) { LOGV("NativeWindowDestroyed: %p -- %p\n", activity, window);

android_app_set_window((struct android_app*)activity->instance, NULL);

}

static void onInputQueueCreated(ANativeActivity* activity, AInputQueue* queue) { LOGV("InputQueueCreated: %p -- %p\n", activity, queue);

android_app_set_input((struct android_app*)activity->instance, queue);

}

static void onInputQueueDestroyed(ANativeActivity* activity, AInputQueue* queue) { LOGV("InputQueueDestroyed: %p -- %p\n", activity, queue);

android_app_set_input((struct android_app*)activity->instance, NULL);

}

void ANativeActivity_onCreate(ANativeActivity* activity,

void* savedState, size_t savedStateSize) {

LOGV("Creating: %p\n", activity);

activity->callbacks->onDestroy = onDestroy;

activity->callbacks->onStart = onStart;

activity->callbacks->onResume = onResume;

activity->callbacks->onSaveInstanceState = onSaveInstanceState;

activity->callbacks->onPause = onPause;

activity->callbacks->onStop = onStop;

activity->callbacks->onConfigurationChanged = onConfigurationChanged;

activity->callbacks->onLowMemory = onLowMemory;

activity->callbacks->onWindowFocusChanged = onWindowFocusChanged;

activity->callbacks->onNativeWindowCreated = onNativeWindowCreated;

activity->callbacks->onNativeWindowDestroyed = onNativeWindowDestroyed;

activity->callbacks->onInputQueueCreated = onInputQueueCreated;

activity->callbacks->onInputQueueDestroyed = onInputQueueDestroyed;

activity->instance = android_app_create(activity, savedState, savedStateSize);

}