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