1 files changed, 146 insertions, 0 deletions
diff --git a/dist/xcb-util/reply/reply.c b/dist/xcb-util/reply/reply.c
new file mode 100644
index 000000000..0cc75c6f6
--- /dev/null
+++ b/dist/xcb-util/reply/reply.c
@@ -0,0 +1,146 @@
+/*
+ * 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);
+}