Add android native_app_glue to platform_tools/android/third_party

platform_tools/android/third_party/native_app_glue/android_native_app_glue.c

Index: platform_tools/android/third_party/native_app_glue/android_native_app_glue.c
diff --git a/platform_tools/android/third_party/native_app_glue/android_native_app_glue.c b/platform_tools/android/third_party/native_app_glue/android_native_app_glue.c
new file mode 100644
index 0000000000000000000000000000000000000000..55a52bc0e8e3f8b1eba0483edf2f7ad21ec95569
--- /dev/null
+++ b/platform_tools/android/third_party/native_app_glue/android_native_app_glue.c
@@ -0,0 +1,440 @@
+/*
+ * 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
+ *
+ *      http://www.apache.org/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 <jni.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/resource.h>
+
+#include "android_native_app_glue.h"
+#include <android/log.h>
+
+#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "threaded_app", __VA_ARGS__))
+#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "threaded_app", __VA_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", __VA_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_SAVE_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);
+            pthread_mutex_unlock(&android_app->mutex);
+            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_SAVE_STATE:
+            LOGV("APP_CMD_SAVE_STATE\n");
+            pthread_mutex_lock(&android_app->mutex);
+            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;
+    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);
+    }
+}
+
+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_SAVE_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);
+}