Use init and clear for GMutex and GCond

[projects/chimara/chimara.git] / libchimara / abort.c

diff --git a/libchimara/abort.c b/libchimara/abort.c
index 5a812cfc200ac4ba9d7b75a9688a414f94146a4d..26eb8c4d1c136a4c122ffb0ebaad2e738fe5b5bb 100644 (file)
--- a/libchimara/abort.c
+++ b/libchimara/abort.c
@@ -4,6 +4,7 @@
 #include <gtk/gtk.h>
 
 #include "chimara-glk-private.h"
+#include "window.h"
 
 extern GPrivate *glk_data_key;
 
@@ -42,7 +43,13 @@ abort_glk(void)
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
        if(glk_data->interrupt_handler)
                (*(glk_data->interrupt_handler))();
-       shutdown_glk();
+       shutdown_glk_pre();
+       shutdown_glk_post();
+       /* If program is terminated by g_thread_exit() instead of returning from the
+        glk_main() function, then the line in glk_exit() where the "stopped" 
+        signal is emitted will not be reached. So we have to emit it here. */
+       if(!glk_data->in_startup)
+               g_signal_emit_by_name(glk_data->self, "stopped");
        g_thread_exit(NULL);
 }
 
@@ -51,28 +58,26 @@ void
 check_for_abort(void)
 {
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
-       g_mutex_lock(glk_data->abort_lock);
+       g_mutex_lock(&glk_data->abort_lock);
        if(glk_data->abort_signalled)
        {
-               g_mutex_unlock(glk_data->abort_lock);
+               g_mutex_unlock(&glk_data->abort_lock);
                abort_glk();
        }
-       g_mutex_unlock(glk_data->abort_lock);
+       g_mutex_unlock(&glk_data->abort_lock);
 }
 
-/* Internal function: do any cleanup for shutting down the Glk library. */
+/* Internal function: shut down all requests and anything not necessary while
+ showing the last displayed configuration of windows. */
 void
-shutdown_glk(void)
+shutdown_glk_pre(void)
 {
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
-
-       if(!glk_data->in_startup)
-               g_signal_emit_by_name(glk_data->self, "stopped");
-
+       
        /* Stop any timers */
        glk_request_timer_events(0);
-
-       /* Cancel any pending input requests */
+       
+       /* Cancel any pending input requests and flush all window buffers */
        winid_t win;
        for(win = glk_window_iterate(NULL, NULL); win; win = glk_window_iterate(win, NULL))
        {
@@ -88,20 +93,87 @@ shutdown_glk(void)
                                break;
                        case INPUT_REQUEST_NONE:
                        default:
-                               ; /* Handle mouse and hyperlink requests */
+                               ; /* TODO: Handle mouse and hyperlink requests */
                }
+               
+               flush_window_buffer(win);
        }
-
+       
        /* Close any open resource files */
        if(glk_data->resource_map != NULL) {
                giblorb_destroy_map(glk_data->resource_map);
+               glk_data->resource_map = NULL;
                glk_stream_close(glk_data->resource_file, NULL);
        }
+       
+       /* Empty the input queues */
+       while(g_async_queue_try_pop(glk_data->char_input_queue))
+               ;
+       while(g_async_queue_try_pop(glk_data->line_input_queue))
+               ;
+       
+       /* Wait for any pending window rearrange */
+       g_mutex_lock(&glk_data->arrange_lock);
+       if(glk_data->needs_rearrange)
+               g_cond_wait(&glk_data->rearranged, &glk_data->arrange_lock);
+       g_mutex_unlock(&glk_data->arrange_lock);
+}
+
+/* Internal function: do any Glk-thread cleanup for shutting down the Glk library. */
+void
+shutdown_glk_post(void)
+{
+       ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
+       
+       /* Free all opaque objects; can't iterate normally, because the objects are
+        being removed from the global iteration lists */
+       if(glk_data->root_window)
+               glk_window_close(glk_data->root_window->data, NULL);
+       g_assert(glk_data->root_window == NULL);
+       strid_t str;
+       while( (str = glk_stream_iterate(NULL, NULL)) )
+               glk_stream_close(str, NULL);
+       frefid_t fref;
+       while( (fref = glk_fileref_iterate(NULL, NULL)) )
+               glk_fileref_destroy(fref);
+       schanid_t sch;
+       while( (sch = glk_schannel_iterate(NULL, NULL)) )
+               glk_schannel_destroy(sch);
+       
+       /* Empty the event queue */
+       g_mutex_lock(&glk_data->event_lock);
+       g_queue_foreach(glk_data->event_queue, (GFunc)g_free, NULL);
+
+       /* COMPAT: g_queue_clear could be used here, but only appeared in 2.14 */
+       // g_queue_clear(glk_data->event_queue);
+       g_list_free(glk_data->event_queue->head);
+       glk_data->event_queue->head = glk_data->event_queue->tail = NULL;
+       glk_data->event_queue->length = 0;
+
+       g_mutex_unlock(&glk_data->event_lock);
+
+       /* Reset the abort signaling mechanism */
+       g_mutex_lock(&glk_data->abort_lock);
+       glk_data->abort_signalled = FALSE;
+       g_mutex_unlock(&glk_data->abort_lock);
+
+       /* Reset arrangement mechanism */
+       g_mutex_lock(&glk_data->arrange_lock);
+       glk_data->needs_rearrange = FALSE;
+       glk_data->ignore_next_arrange_event = FALSE;
+       g_mutex_unlock(&glk_data->arrange_lock);
 
-       /* Unref the input queues */
+       /* Unref input queues (they are not destroyed because the main thread stil holds a ref */
        g_async_queue_unref(glk_data->char_input_queue);
        g_async_queue_unref(glk_data->line_input_queue);
 
-       printf("cleaning up...\n");
-       chimara_glk_reset(glk_data->self);
+       /* Reset other stuff */
+       glk_data->interrupt_handler = NULL;
+       g_free(glk_data->current_dir);
+       glk_data->current_dir = NULL;
+       /* Remove the dispatch callbacks */
+       glk_data->register_obj = NULL;
+       glk_data->unregister_obj = NULL;
+       glk_data->register_arr = NULL;
+       glk_data->unregister_arr = NULL;
 }