1 files changed, 77 insertions, 0 deletions
diff --git a/libxcb/src/xcb_xid.c b/libxcb/src/xcb_xid.c
new file mode 100644
index 000000000..7ff0c5fc2
--- /dev/null
+++ b/libxcb/src/xcb_xid.c
@@ -0,0 +1,77 @@
+/* Copyright (C) 2001-2004 Bart Massey and Jamey Sharp.
+ *
+ * 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.
+ */
+
+/* XID allocators. */
+
+#include <stdlib.h>
+#include "xcb.h"
+#include "xcbext.h"
+#include "xcbint.h"
+#include "xc_misc.h"
+
+/* Public interface */
+
+uint32_t xcb_generate_id(xcb_connection_t *c)
+{
+    uint32_t ret;
+    if(c->has_error)
+        return -1;
+    pthread_mutex_lock(&c->xid.lock);
+    if(c->xid.last == c->xid.max)
+    {
+        xcb_xc_misc_get_xid_range_reply_t *range;
+        range = xcb_xc_misc_get_xid_range_reply(c, xcb_xc_misc_get_xid_range(c), 0);
+        if(!range)
+        {
+            pthread_mutex_unlock(&c->xid.lock);
+            return -1;
+        }
+        c->xid.last = range->start_id;
+        c->xid.max = range->start_id + (range->count - 1) * c->xid.inc;
+        free(range);
+    }
+    ret = c->xid.last | c->xid.base;
+    c->xid.last += c->xid.inc;
+    pthread_mutex_unlock(&c->xid.lock);
+    return ret;
+}
+
+/* Private interface */
+
+int _xcb_xid_init(xcb_connection_t *c)
+{
+    if(pthread_mutex_init(&c->xid.lock, 0))
+        return 0;
+    c->xid.last = 0;
+    c->xid.base = c->setup->resource_id_base;
+    c->xid.max = c->setup->resource_id_mask;
+    c->xid.inc = c->setup->resource_id_mask & -(c->setup->resource_id_mask);
+    return 1;
+}
+
+void _xcb_xid_destroy(xcb_connection_t *c)
+{
+    pthread_mutex_destroy(&c->xid.lock);
+}