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/*
* Copyright © 2008 Julien Danjou <julien@danjou.info>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or
* their institutions shall not be used in advertising or otherwise to
* promote the sale, use or other dealings in this Software without
* prior written authorization from the authors.
*/
#include <stdlib.h>
#include <xcb/xcbext.h>
#include "xcb_reply.h"
void
xcb_reply_handlers_init(xcb_connection_t *c, xcb_reply_handlers_t *r)
{
static const pthread_mutex_t proto_lock = PTHREAD_MUTEX_INITIALIZER;
static const pthread_cond_t proto_cond = PTHREAD_COND_INITIALIZER;
r->lock = proto_lock;
r->cond = proto_cond;
r->c = c;
r->head = NULL;
}
xcb_connection_t *
xcb_reply_get_xcb_connection(xcb_reply_handlers_t *h)
{
return h->c;
}
static void
insert_handler(xcb_reply_handlers_t *h, struct xcb_reply_node *cur)
{
struct xcb_reply_node **prev = &h->head;
while(*prev && (*prev)->request < cur->request)
prev = &(*prev)->next;
cur->next = *prev;
*prev = cur;
}
static void
remove_handler(xcb_reply_handlers_t *h, struct xcb_reply_node *cur)
{
struct xcb_reply_node **prev = &h->head;
while(*prev && (*prev)->request < cur->request)
prev = &(*prev)->next;
if(!(*prev) || (*prev)->request != cur->request)
return;
*prev = cur->next;
free(cur);
}
static int
process_replies(xcb_reply_handlers_t *h, int block)
{
int handled = 0;
pthread_mutex_lock(&h->lock);
pthread_cleanup_push((void (*)(void *)) pthread_mutex_unlock, &h->lock);
while(1)
{
struct xcb_reply_node *cur = h->head;
xcb_generic_error_t *error;
void *reply;
pthread_mutex_unlock(&h->lock);
pthread_cleanup_push((void (*)(void *)) pthread_mutex_lock, &h->lock);
if(block)
reply = xcb_wait_for_reply(h->c, cur->request, &error);
else if(!xcb_poll_for_reply(h->c, cur->request, &reply, &error))
return handled;
if(reply || error)
{
cur->handler(cur->data, h->c, reply, error);
cur->handled = 1;
free(reply);
free(error);
}
handled |= cur->handled;
pthread_cleanup_pop(1);
if(!reply)
remove_handler(h, cur);
if(!h->head)
{
if(block)
pthread_cond_wait(&h->cond, &h->lock);
else
break;
}
}
pthread_cleanup_pop(1);
return handled;
}
static void *
reply_thread(void *h)
{
process_replies(h, 1);
return 0;
}
void
xcb_reply_start_thread(xcb_reply_handlers_t *h)
{
pthread_create(&h->thread, 0, reply_thread, h);
}
void
xcb_reply_stop_thread(xcb_reply_handlers_t *h)
{
pthread_cancel(h->thread);
pthread_join(h->thread, 0);
}
void
xcb_reply_add_handler(xcb_reply_handlers_t *h, unsigned int request, xcb_generic_reply_handler_t handler, void *data)
{
struct xcb_reply_node *cur = malloc(sizeof(struct xcb_reply_node));
cur->request = request;
cur->handler = handler;
cur->data = data;
cur->handled = 0;
pthread_mutex_lock(&h->lock);
insert_handler(h, cur);
pthread_cond_broadcast(&h->cond);
pthread_mutex_unlock(&h->lock);
}
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