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/*
(c) Copyright 2012-2013 DirectFB integrated media GmbH
(c) Copyright 2001-2013 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Shimokawa <andi@directfb.org>,
Marek Pikarski <mass@directfb.org>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <direct/debug.h>
#include <direct/direct.h>
#include <direct/interface.h>
#include <direct/list.h>
#include <direct/log.h>
#include <direct/mem.h>
#include <direct/signals.h>
#include <direct/thread.h>
#include <direct/util.h>
D_LOG_DOMAIN( Direct_Main, "Direct/Main", "Initialization and shutdown of libdirect" );
/**************************************************************************************************/
struct __D_DirectCleanupHandler {
DirectLink link;
int magic;
DirectCleanupHandlerFunc func;
void *ctx;
};
/**************************************************************************************************/
static int refs;
static DirectLink *handlers;
static DirectMutex main_lock;
void
__D_direct_init()
{
direct_mutex_init( &main_lock );
}
void
__D_direct_deinit()
{
direct_print_memleaks();
direct_print_interface_leaks();
direct_mutex_deinit( &main_lock );
}
static void
direct_atexit_handler( void )
{
DirectCleanupHandler *handler, *temp;
direct_list_foreach_safe (handler, temp, handlers) {
D_DEBUG_AT( Direct_Main, "Calling cleanup func %p( %p )...\n", handler->func, handler->ctx );
direct_list_remove( &handlers, &handler->link );
handler->func( handler->ctx );
D_MAGIC_CLEAR( handler );
D_FREE( handler );
}
}
/**************************************************************************************************/
DirectResult
direct_cleanup_handler_add( DirectCleanupHandlerFunc func,
void *ctx,
DirectCleanupHandler **ret_handler )
{
DirectCleanupHandler *handler;
D_ASSERT( func != NULL );
D_ASSERT( ret_handler != NULL );
D_DEBUG_AT( Direct_Main,
"Adding cleanup handler %p with context %p...\n", func, ctx );
handler = (DirectCleanupHandler*) D_CALLOC( 1, sizeof(DirectCleanupHandler) );
if (!handler) {
D_WARN( "out of memory" );
return DR_NOLOCALMEMORY;
}
handler->func = func;
handler->ctx = ctx;
D_MAGIC_SET( handler, DirectCleanupHandler );
direct_mutex_lock( &main_lock );
if (handlers == NULL)
atexit( direct_atexit_handler );
direct_list_append( &handlers, &handler->link );
direct_mutex_unlock( &main_lock );
*ret_handler = handler;
return DR_OK;
}
DirectResult
direct_cleanup_handler_remove( DirectCleanupHandler *handler )
{
D_ASSERT( handler != NULL );
D_MAGIC_ASSERT( handler, DirectCleanupHandler );
D_DEBUG_AT( Direct_Main, "Removing cleanup handler %p with context %p...\n",
handler->func, handler->ctx );
/* Safety check, in case handler is removed from within itself being invoked */
if (handler->link.prev) {
direct_mutex_lock( &main_lock );
direct_list_remove( &handlers, &handler->link );
direct_mutex_unlock( &main_lock );
D_MAGIC_CLEAR( handler );
D_FREE( handler );
}
return DR_OK;
}
DirectResult
direct_initialize()
{
direct_clock_set_time( DIRECT_CLOCK_SESSION, 0 );
direct_mutex_lock( &main_lock );
D_DEBUG_AT( Direct_Main, "direct_initialize() called... (from %s)\n",
direct_trace_lookup_symbol_at( direct_trace_get_caller() ) );
if (refs++) {
D_DEBUG_AT( Direct_Main, "...%d references now.\n", refs );
direct_mutex_unlock( &main_lock );
return DR_OK;
}
else if (!direct_thread_self_name())
direct_thread_set_name( "Main Thread" );
D_DEBUG_AT( Direct_Main, "...first reference, initializing now.\n" );
direct_signals_initialize();
direct_mutex_unlock( &main_lock );
return DR_OK;
}
DirectResult
direct_shutdown()
{
direct_mutex_lock( &main_lock );
D_DEBUG_AT( Direct_Main, "direct_shutdown() called... (from %s)\n",
direct_trace_lookup_symbol_at( direct_trace_get_caller() ) );
if (refs == 1) {
D_DEBUG_AT( Direct_Main, "...shutting down now.\n" );
direct_signals_shutdown();
D_DEBUG_AT( Direct_Main, " -> done.\n" );
}
else
D_DEBUG_AT( Direct_Main, "...%d references left.\n", refs - 1 );
refs--;
direct_mutex_unlock( &main_lock );
return DR_OK;
}
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