58e097d4a6
Especially when unzipping rockbox.zip, the native code can be initialized a lot later than the java code. The java code needs to be prevented from accessing rockbox structures (e.g. current_tick, event queues) before they're ready. This commit adds wait_rockbox_ready() and fixes dodgy behavior of starting rockbox via widget play button, headset remote buttons or multimedia keys. Also fixes wrong small list items before first redraw. Change-Id: I1caf925e829a9c1c6bb6e0016d5c80574574c91e
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2010 Thomas Martitz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <setjmp.h>
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#include <jni.h>
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#include <pthread.h>
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#include "config.h"
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#include "system.h"
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/* global fields for use with various JNI calls */
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static JavaVM *vm_ptr;
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JNIEnv *env_ptr;
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jobject RockboxService_instance;
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jclass RockboxService_class;
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uintptr_t *stackbegin;
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uintptr_t *stackend;
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extern int main(void);
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extern void telephony_init_device(void);
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void system_exception_wait(void) { }
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void system_reboot(void) { }
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/* this is used to return from the entry point of the native library. */
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static jmp_buf poweroff_buf;
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void power_off(void)
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{
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longjmp(poweroff_buf, 1);
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}
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void system_init(void)
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{
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/* no better place yet */
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telephony_init_device();
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}
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JNIEXPORT jint JNICALL
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JNI_OnLoad(JavaVM *vm, void* reserved)
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{
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(void)reserved;
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vm_ptr = vm;
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return JNI_VERSION_1_2;
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}
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JNIEnv* getJavaEnvironment(void)
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{
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JNIEnv* env;
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(*vm_ptr)->GetEnv(vm_ptr, (void**) &env, JNI_VERSION_1_2);
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return env;
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}
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/* this is the entry point of the android app initially called by jni */
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JNIEXPORT void JNICALL
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Java_org_rockbox_RockboxService_main(JNIEnv *env, jobject this)
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{
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/* hack!!! we can't have a valid stack pointer otherwise.
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* but we don't really need it anyway, thread.c only needs it
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* for overflow detection which doesn't apply for the main thread
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* (it's managed by the OS) */
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volatile uintptr_t stack = 0;
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stackbegin = stackend = (uintptr_t*) &stack;
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/* setup a jmp_buf to come back later in case of exit */
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if (setjmp(poweroff_buf) == 0)
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{
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env_ptr = env;
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RockboxService_instance = this;
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RockboxService_class = (*env)->GetObjectClass(env, this);
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main();
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}
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/* simply return here. this will allow the VM to clean up objects and do
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* garbage collection */
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}
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/* below is the facility for external (from other java threads) to safely call
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* into our snative code. When extracting rockbox.zip the main function is
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* called only after extraction. This delay can be accounted for by calling
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* wait_rockbox_ready(). This does not return until the critical parts of Rockbox
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* can be considered up and running. */
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static pthread_cond_t btn_cond = PTHREAD_COND_INITIALIZER;
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static pthread_mutex_t btn_mtx = PTHREAD_MUTEX_INITIALIZER;
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static bool initialized;
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bool is_rockbox_ready(void)
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{
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/* don't bother with mutexes for this */
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return initialized;
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}
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void wait_rockbox_ready(void)
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{
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pthread_mutex_lock(&btn_mtx);
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if (!initialized)
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pthread_cond_wait(&btn_cond, &btn_mtx);
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pthread_mutex_unlock(&btn_mtx);
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}
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void set_rockbox_ready(void)
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{
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pthread_mutex_lock(&btn_mtx);
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initialized = true;
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/* now ready. signal all waiters */
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pthread_cond_broadcast(&btn_cond);
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pthread_mutex_unlock(&btn_mtx);
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}
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