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#include <gtk/gtk.h>
#include "allegro5/allegro.h"
#include "allegro5/allegro_native_dialog.h"
#include "allegro5/internal/aintern_native_dialog.h"
#include "allegro5/internal/aintern_native_dialog_cfg.h"
#include "gtk_dialog.h"
#include "allegro5/internal/aintern_vector.h"
ALLEGRO_DEBUG_CHANNEL("gtk")
/* GTK is not thread safe. We launch a single thread which runs the GTK main
* loop, and it is the only thread which calls into GTK. (g_timeout_add may be
* called from other threads without locking.)
*
* We used to attempt to use gdk_threads_enter/gdk_threads_leave but hit
* some problems with deadlocks so switched to this.
*/
// G_STATIC_MUTEX_INIT causes a warning about a missing initializer, so if we
// have version 2.32 or newer don't use it to avoid the warning.
#if GLIB_CHECK_VERSION(2, 32, 0)
#define NEWER_GLIB 1
#else
#define NEWER_GLIB 0
#endif
#if NEWER_GLIB
static GMutex nd_gtk_mutex;
static void nd_gtk_lock(void) { g_mutex_lock(&nd_gtk_mutex); }
static void nd_gtk_unlock(void) { g_mutex_unlock(&nd_gtk_mutex); }
#else
static GStaticMutex nd_gtk_mutex = G_STATIC_MUTEX_INIT;
static void nd_gtk_lock(void) { g_static_mutex_lock(&nd_gtk_mutex); }
static void nd_gtk_unlock(void) { g_static_mutex_unlock(&nd_gtk_mutex); }
#endif
static GThread *nd_gtk_thread = NULL;
static void *nd_gtk_thread_func(void *data)
{
GAsyncQueue *queue = data;
ALLEGRO_DEBUG("GLIB %d.%d.%d\n",
GLIB_MAJOR_VERSION,
GLIB_MINOR_VERSION,
GLIB_MICRO_VERSION);
g_async_queue_push(queue, ACK_OK);
gtk_main();
ALLEGRO_INFO("GTK stopped.\n");
return NULL;
}
bool _al_gtk_ensure_thread(void)
{
bool ok = true;
#if !NEWER_GLIB
if (!g_thread_supported())
g_thread_init(NULL);
#endif
/* al_init_native_dialog_addon() didn't always exist so GTK might not have
* been initialised. gtk_init_check knows if it's been initialised already
* so we can just call it again.
*/
{
int argc = 0;
char **argv = NULL;
if (!gtk_init_check(&argc, &argv)) {
ALLEGRO_ERROR("gtk_init_check failed\n");
return false;
}
}
nd_gtk_lock();
if (!nd_gtk_thread) {
GAsyncQueue *queue = g_async_queue_new();
#if NEWER_GLIB
nd_gtk_thread = g_thread_new("gtk thread", nd_gtk_thread_func, queue);
#else
bool joinable = FALSE;
nd_gtk_thread = g_thread_create(nd_gtk_thread_func, queue, joinable, NULL);
#endif
if (!nd_gtk_thread) {
ok = false;
}
else {
ok = (g_async_queue_pop(queue) == ACK_OK);
}
g_async_queue_unref(queue);
}
nd_gtk_unlock();
return ok;
}
/* [user thread] */
bool _al_gtk_init_args(void *ptr, size_t size)
{
ARGS_BASE *args = (ARGS_BASE *)ptr;
memset(args, 0, size);
args->mutex = al_create_mutex();
if (!args->mutex) {
return false;
}
args->cond = al_create_cond();
if (!args->cond) {
al_destroy_mutex(args->mutex);
return false;
}
args->done = false;
args->response = true;
return args;
}
/* [user thread] */
bool _al_gtk_wait_for_args(GSourceFunc func, void *data)
{
ARGS_BASE *args = (ARGS_BASE *) data;
bool response;
al_lock_mutex(args->mutex);
g_timeout_add(0, func, data);
while (args->done == false) {
al_wait_cond(args->cond, args->mutex);
}
al_unlock_mutex(args->mutex);
response = args->response;
al_destroy_mutex(args->mutex);
al_destroy_cond(args->cond);
return response;
}
/* [gtk thread] */
void *_al_gtk_lock_args(gpointer data)
{
ARGS_BASE *args = (ARGS_BASE *) data;
al_lock_mutex(args->mutex);
return args;
}
/* [gtk thread] */
gboolean _al_gtk_release_args(gpointer data)
{
ARGS_BASE *args = (ARGS_BASE *) data;
args->done = true;
al_signal_cond(args->cond);
al_unlock_mutex(args->mutex);
return FALSE;
}
/* vim: set sts=3 sw=3 et: */
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