mirror of
https://github.com/Gnucash/gnucash.git
synced 2026-09-03 20:53:02 -05:00
Restructure the src directory
It is split into - /libgnucash (for the non-gui bits) - /gnucash (for the gui) - /common (misc source files used by both) - /bindings (currently only holds python bindings) This is the first step in restructuring the code. It will need much more fine tuning later on.
This commit is contained in:
Geert Janssens
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/********************************************************************
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* qofevent.c -- QOF event handling implementation *
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* Copyright 2000 Dave Peticolas <dave@krondo.com> *
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* Copyright 2006 Neil Williams <linux@codehelp.co.uk> *
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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 as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, contact: *
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* *
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* Free Software Foundation Voice: +1-617-542-5942 *
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* 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652 *
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* Boston, MA 02110-1301, USA gnu@gnu.org *
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* *
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********************************************************************/
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extern "C"
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{
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#include "config.h"
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#include <glib.h>
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}
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#include "qof.h"
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#include "qofevent-p.h"
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/* Static Variables ************************************************/
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static guint suspend_counter = 0;
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static gint next_handler_id = 1;
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static guint handler_run_level = 0;
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static guint pending_deletes = 0;
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static GList *handlers = NULL;
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/* This static indicates the debugging module that this .o belongs to. */
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static QofLogModule log_module = QOF_MOD_ENGINE;
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/* Implementations *************************************************/
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static gint
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find_next_handler_id(void)
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{
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HandlerInfo *hi;
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gint handler_id;
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GList *node;
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/* look for a free handler id */
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handler_id = next_handler_id;
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node = handlers;
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while (node)
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{
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hi = static_cast<HandlerInfo*>(node->data);
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if (hi->handler_id == handler_id)
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{
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handler_id++;
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node = handlers;
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continue;
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}
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node = node->next;
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}
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/* Update id for next registration */
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next_handler_id = handler_id + 1;
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return handler_id;
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}
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gint
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qof_event_register_handler (QofEventHandler handler, gpointer user_data)
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{
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HandlerInfo *hi;
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gint handler_id;
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ENTER ("(handler=%p, data=%p)", handler, user_data);
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/* sanity check */
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if (!handler)
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{
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PERR ("no handler specified");
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return 0;
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}
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/* look for a free handler id */
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handler_id = find_next_handler_id();
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/* Found one, add the handler */
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hi = g_new0 (HandlerInfo, 1);
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hi->handler = handler;
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hi->user_data = user_data;
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hi->handler_id = handler_id;
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handlers = g_list_prepend (handlers, hi);
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LEAVE ("(handler=%p, data=%p) handler_id=%d", handler, user_data, handler_id);
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return handler_id;
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}
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void
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qof_event_unregister_handler (gint handler_id)
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{
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GList *node;
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ENTER ("(handler_id=%d)", handler_id);
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for (node = handlers; node; node = node->next)
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{
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HandlerInfo *hi = static_cast<HandlerInfo*>(node->data);
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if (hi->handler_id != handler_id)
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continue;
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/* Normally, we could actually remove the handler's node from the
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list, but we may be unregistering the event handler as a result
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of a generated event, such as QOF_EVENT_DESTROY. In that case,
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we're in the middle of walking the GList and it is wrong to
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modify the list. So, instead, we just NULL the handler. */
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if (hi->handler)
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LEAVE ("(handler_id=%d) handler=%p data=%p", handler_id,
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hi->handler, hi->user_data);
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/* safety -- clear the handler in case we're running events now */
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hi->handler = NULL;
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if (handler_run_level == 0)
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{
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handlers = g_list_remove_link (handlers, node);
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g_list_free_1 (node);
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g_free (hi);
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}
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else
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{
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pending_deletes++;
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}
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return;
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}
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PERR ("no such handler: %d", handler_id);
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}
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void
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qof_event_suspend (void)
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{
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suspend_counter++;
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if (suspend_counter == 0)
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{
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PERR ("suspend counter overflow");
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}
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}
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void
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qof_event_resume (void)
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{
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if (suspend_counter == 0)
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{
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PERR ("suspend counter underflow");
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return;
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}
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suspend_counter--;
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}
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static void
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qof_event_generate_internal (QofInstance *entity, QofEventId event_id,
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gpointer event_data)
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{
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GList *node;
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GList *next_node = NULL;
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g_return_if_fail(entity);
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switch (event_id)
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{
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case QOF_EVENT_NONE:
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{
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/* if none, don't log, just return. */
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return;
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}
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}
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handler_run_level++;
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for (node = handlers; node; node = next_node)
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{
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HandlerInfo *hi = static_cast<HandlerInfo*>(node->data);
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next_node = node->next;
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if (hi->handler)
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{
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PINFO("id=%d hi=%p han=%p data=%p", hi->handler_id, hi,
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hi->handler, event_data);
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hi->handler (entity, event_id, hi->user_data, event_data);
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}
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}
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handler_run_level--;
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/* If we're the outermost event runner and we have pending deletes
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* then go delete the handlers now.
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*/
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if (handler_run_level == 0 && pending_deletes)
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{
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for (node = handlers; node; node = next_node)
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{
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HandlerInfo *hi = static_cast<HandlerInfo*>(node->data);
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next_node = node->next;
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if (hi->handler == NULL)
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{
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/* remove this node from the list, then free this node */
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handlers = g_list_remove_link (handlers, node);
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g_list_free_1 (node);
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g_free (hi);
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}
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}
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pending_deletes = 0;
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}
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}
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void
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qof_event_force (QofInstance *entity, QofEventId event_id, gpointer event_data)
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{
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if (!entity)
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return;
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qof_event_generate_internal (entity, event_id, event_data);
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}
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void
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qof_event_gen (QofInstance *entity, QofEventId event_id, gpointer event_data)
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{
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if (!entity)
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return;
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if (suspend_counter)
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return;
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qof_event_generate_internal (entity, event_id, event_data);
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}
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/* =========================== END OF FILE ======================= */
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