Android: Implement app shutdown and thus, sleep timer.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29602 a1c6a512-1295-4272-9138-f99709370657

android/src/org/rockbox/RockboxActivity.java

@@ -81,6 +81,9 @@ public class RockboxActivity extends Activity
                     case RockboxService.RESULT_ERROR_OCCURED:
                         Toast.makeText(RockboxActivity.this, resultData.getString("error"), Toast.LENGTH_LONG);
                         break;
+                    case RockboxService.RESULT_ROCKBOX_EXIT:
+                        finish();
+                        break;
                 }
             }
         });

android/src/org/rockbox/RockboxService.java

@@ -75,6 +75,7 @@ public class RockboxService extends Service
     public static final int RESULT_SERVICE_RUNNING = 3;
     public static final int RESULT_ERROR_OCCURED = 4;
     public static final int RESULT_LIB_LOADED = 5;
+    public static final int RESULT_ROCKBOX_EXIT = 6;
 
     @Override
     public void onCreate()
@@ -270,7 +271,12 @@ public class RockboxService extends Service
 		            resultReceiver.send(RESULT_INVOKING_MAIN, null);
 
                 main();
-		        throw new IllegalStateException("native main() returned!");
+
+                if (resultReceiver != null)
+                    resultReceiver.send(RESULT_ROCKBOX_EXIT, null);
+
+                LOG("Stop service: main() returned");
+                stopSelf(); /* serivce is of no use anymore */
             }
         }, "Rockbox thread");
         rb.setDaemon(false);
@@ -353,5 +359,11 @@ public class RockboxService extends Service
         stopForeground();
         instance = null;
         rockbox_running = false;
+        System.runFinalization();
+        /* exit() seems unclean but is needed in order to get the .so file garbage 
+         * collected, otherwise Android caches this Service and librockbox.so
+         * The library must be reloaded to zero the bss and reset data
+         * segment */
+        System.exit(0);
     }
 }

apps/misc.c

@@ -257,12 +257,6 @@ static void system_restore(void)
 
 static bool clean_shutdown(void (*callback)(void *), void *parameter)
 {
-#if (CONFIG_PLATFORM & PLATFORM_ANDROID)
-    (void)callback;
-    (void)parameter;
-    bookmark_autobookmark(false);
-    call_storage_idle_notifys(true);
-#else
     long msg_id = -1;
     int i;
 
@@ -373,7 +367,6 @@ static bool clean_shutdown(void (*callback)(void *), void *parameter)
 
         shutdown_hw();
     }
-#endif
     return false;
 }
 

firmware/target/hosted/android/pcm-android.c

@@ -36,6 +36,7 @@ static char   *pcm_data_start;
 static jmethodID play_pause_method;
 static jmethodID stop_method;
 static jmethodID set_volume_method;
+static jclass    RockboxPCM_class;
 static jobject   RockboxPCM_instance;
 
 
@@ -159,7 +160,7 @@ void pcm_play_dma_init(void)
      **/
     JNIEnv e = *env_ptr;
     /* get the class and its constructor */
-    jclass RockboxPCM_class = e->FindClass(env_ptr, "org/rockbox/RockboxPCM");
+    RockboxPCM_class = e->FindClass(env_ptr, "org/rockbox/RockboxPCM");
     jmethodID constructor = e->GetMethodID(env_ptr, RockboxPCM_class, "<init>", "()V");
     /* instance = new RockboxPCM() */
     RockboxPCM_instance = e->NewObject(env_ptr, RockboxPCM_class, constructor);
@@ -180,6 +181,15 @@ void pcm_set_mixer_volume(int volume)
     (*env_ptr)->CallVoidMethod(env_ptr, RockboxPCM_instance, set_volume_method, volume);
 }
 
+/*
+ * release audio resources */
+void pcm_shutdown(void)
+{
+    JNIEnv e = *env_ptr;
+    jmethodID release = e->GetMethodID(env_ptr, RockboxPCM_class, "release", "()V");
+    e->CallVoidMethod(env_ptr, RockboxPCM_instance, release);
+}
+    
 /* Due to limitations of default_event_handler(), parameters gets swallowed when
  * being posted with queue_broadcast(), so workaround this by caching the last
  * value.

firmware/target/hosted/android/system-android.c

@@ -20,6 +20,7 @@
  ****************************************************************************/
 
 
+#include <setjmp.h>
 #include <jni.h>
 #include "config.h"
 #include "system.h"
@@ -37,10 +38,17 @@ uintptr_t *stackend;
 
 extern int main(void);
 extern void telephony_init_device(void);
+extern void pcm_shutdown(void);
 
 void system_exception_wait(void) { }
 void system_reboot(void) { }
-void power_off(void) { }
+
+/* this is used to return from the entry point of the native library. */
+static jmp_buf poweroff_buf;
+void shutdown_hw(void)
+{
+    longjmp(poweroff_buf, 1);
+}
 
 void system_init(void)
 {
@@ -75,10 +83,18 @@ Java_org_rockbox_RockboxService_main(JNIEnv *env, jobject this)
 
     volatile uintptr_t stack = 0;
     stackbegin = stackend = (uintptr_t*) &stack;
+    /* setup a jmp_buf to come back later in case of exit */
+    if (setjmp(poweroff_buf) == 0)
+    {
         env_ptr = env;
 
         RockboxService_instance = this;
         RockboxService_class = (*env)->GetObjectClass(env, this);
 
         main();
+    }
+
+    pcm_shutdown();
+    /* simply return here. this will allow the VM to clean up objects and do
+     * garbage collection */
 }