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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /libxcb/src/xcb_ext.c
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Checked in the following released items:
xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz
Diffstat (limited to 'libxcb/src/xcb_ext.c')
-rw-r--r--libxcb/src/xcb_ext.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/libxcb/src/xcb_ext.c b/libxcb/src/xcb_ext.c
new file mode 100644
index 000000000..12cb16463
--- /dev/null
+++ b/libxcb/src/xcb_ext.c
@@ -0,0 +1,127 @@
+/* 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.
+ */
+
+/* A cache for QueryExtension results. */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "xcb.h"
+#include "xcbext.h"
+#include "xcbint.h"
+
+typedef struct lazyreply {
+ enum lazy_reply_tag tag;
+ union {
+ xcb_query_extension_cookie_t cookie;
+ xcb_query_extension_reply_t *reply;
+ } value;
+} lazyreply;
+
+static lazyreply *get_index(xcb_connection_t *c, int index)
+{
+ if(index > c->ext.extensions_size)
+ {
+ int new_size = index << 1;
+ lazyreply *new_extensions = realloc(c->ext.extensions, sizeof(lazyreply) * new_size);
+ if(!new_extensions)
+ return 0;
+ memset(new_extensions + c->ext.extensions_size, 0, sizeof(lazyreply) * (new_size - c->ext.extensions_size));
+ c->ext.extensions = new_extensions;
+ c->ext.extensions_size = new_size;
+ }
+ return c->ext.extensions + index - 1;
+}
+
+static lazyreply *get_lazyreply(xcb_connection_t *c, xcb_extension_t *ext)
+{
+ static pthread_mutex_t global_lock = PTHREAD_MUTEX_INITIALIZER;
+ static int next_global_id;
+
+ lazyreply *data;
+
+ pthread_mutex_lock(&global_lock);
+ if(!ext->global_id)
+ ext->global_id = ++next_global_id;
+ pthread_mutex_unlock(&global_lock);
+
+ data = get_index(c, ext->global_id);
+ if(data && data->tag == LAZY_NONE)
+ {
+ /* cache miss: query the server */
+ data->tag = LAZY_COOKIE;
+ data->value.cookie = xcb_query_extension(c, strlen(ext->name), ext->name);
+ }
+ return data;
+}
+
+/* Public interface */
+
+/* Do not free the returned xcb_query_extension_reply_t - on return, it's aliased
+ * from the cache. */
+const xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext)
+{
+ lazyreply *data;
+ if(c->has_error)
+ return 0;
+
+ pthread_mutex_lock(&c->ext.lock);
+ data = get_lazyreply(c, ext);
+ if(data && data->tag == LAZY_COOKIE)
+ {
+ data->tag = LAZY_FORCED;
+ data->value.reply = xcb_query_extension_reply(c, data->value.cookie, 0);
+ }
+ pthread_mutex_unlock(&c->ext.lock);
+
+ return data ? data->value.reply : 0;
+}
+
+void xcb_prefetch_extension_data(xcb_connection_t *c, xcb_extension_t *ext)
+{
+ if(c->has_error)
+ return;
+ pthread_mutex_lock(&c->ext.lock);
+ get_lazyreply(c, ext);
+ pthread_mutex_unlock(&c->ext.lock);
+}
+
+/* Private interface */
+
+int _xcb_ext_init(xcb_connection_t *c)
+{
+ if(pthread_mutex_init(&c->ext.lock, 0))
+ return 0;
+ return 1;
+}
+
+void _xcb_ext_destroy(xcb_connection_t *c)
+{
+ pthread_mutex_destroy(&c->ext.lock);
+ while(c->ext.extensions_size-- > 0)
+ if(c->ext.extensions[c->ext.extensions_size].tag == LAZY_FORCED)
+ free(c->ext.extensions[c->ext.extensions_size].value.reply);
+ free(c->ext.extensions);
+}