1 files changed, 87 insertions, 0 deletions
diff --git a/libxcb/src/xcb_xlib.c b/libxcb/src/xcb_xlib.c
new file mode 100644
index 000000000..1b573e8a5
--- /dev/null
+++ b/libxcb/src/xcb_xlib.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2005 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.
+ */
+
+#include "xcbxlib.h"
+#include "xcbint.h"
+
+#include <assert.h>
+
+#ifdef HAVE_BACKTRACE
+#include <execinfo.h>
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+
+static void xcb_xlib_printbt(void)
+{
+#ifdef HAVE_BACKTRACE
+	void *array[20];
+	int size;
+	char **strings;
+	int i;
+
+	size = backtrace(array, 20);
+	strings = backtrace_symbols(array, size);
+
+	fprintf(stderr, "Locking assertion failure.  Backtrace:\n");
+
+	for (i = 0; i < size; ++i)
+		fprintf(stderr, "#%i %s\n", i, strings[i]);
+
+	free(strings);
+#endif
+}
+
+#ifndef NDEBUG
+#define xcb_assert(c,x) do { if (!(x)) { xcb_xlib_printbt(); if (!(c)->xlib.sloppy_lock) assert(x); } } while(0)
+#else
+#define xcb_assert(c,x)
+#endif
+
+unsigned int xcb_get_request_sent(xcb_connection_t *c)
+{
+    if(c->has_error)
+        return 0;
+    return c->out.request;
+}
+
+void xcb_xlib_lock(xcb_connection_t *c)
+{
+    _xcb_lock_io(c);
+    xcb_assert(c, !c->xlib.lock);
+    c->xlib.lock = 1;
+    c->xlib.thread = pthread_self();
+    _xcb_unlock_io(c);
+}
+
+void xcb_xlib_unlock(xcb_connection_t *c)
+{
+    _xcb_lock_io(c);
+    xcb_assert(c, c->xlib.lock);
+    xcb_assert(c, pthread_equal(c->xlib.thread, pthread_self()));
+    c->xlib.lock = 0;
+    pthread_cond_broadcast(&c->xlib.cond);
+    _xcb_unlock_io(c);
+}