1 files changed, 78 insertions, 0 deletions
diff --git a/xorg-server/hw/xquartz/threadSafety.c b/xorg-server/hw/xquartz/threadSafety.c
new file mode 100644
index 000000000..85f85bd0a
--- /dev/null
+++ b/xorg-server/hw/xquartz/threadSafety.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2008 Apple, Inc.
+ *
+ * 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 ABOVE LISTED COPYRIGHT HOLDER(S) 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 name(s) of the above copyright
+ * holders shall not be used in advertising or otherwise to promote the sale,
+ * use or other dealings in this Software without prior written authorization.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "threadSafety.h"
+#include "os.h"
+
+pthread_t APPKIT_THREAD_ID;
+pthread_t SERVER_THREAD_ID;
+
+#include <AvailabilityMacros.h>
+
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
+#include <execinfo.h>
+
+void spewCallStack(void) {
+    void* callstack[128];
+    int i, frames = backtrace(callstack, 128);
+    char** strs = backtrace_symbols(callstack, frames);
+    
+    for (i = 0; i < frames; ++i) {
+        ErrorF("%s\n", strs[i]);
+    }
+    
+    free(strs);
+}
+#else
+void spewCallStack(void) {
+	return;
+}
+#endif
+
+void _threadSafetyAssert(pthread_t tid, const char *file, const char *fun, int line) {
+    if(pthread_equal(pthread_self(), tid))
+        return;
+    
+    /* NOOOO! */
+    ErrorF("Thread Assertion Failed: self=%s, expected=%s\n%s:%s:%d\n",
+           threadSafetyID(pthread_self()), threadSafetyID(tid),
+           file, fun, line);
+    spewCallStack();
+}
+
+const char *threadSafetyID(pthread_t tid) {
+    if(pthread_equal(tid, APPKIT_THREAD_ID)) {
+        return "Appkit Thread";
+    } else if(pthread_equal(tid, SERVER_THREAD_ID)) {
+        return "Xserver Thread";
+    } else {        
+        return "Unknown Thread";
+    }
+}