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-rw-r--r--unix/tkUnixEvent.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/unix/tkUnixEvent.c b/unix/tkUnixEvent.c
index 4d0ccfa..6268b25 100644
--- a/unix/tkUnixEvent.c
+++ b/unix/tkUnixEvent.c
@@ -116,8 +116,20 @@ TkpOpenDisplay(
const char *displayNameStr)
{
TkDisplay *dispPtr;
- Display *display = XOpenDisplay(displayNameStr);
+ Display *display;
+#ifdef TCL_THREADS
+ static int xinited = 0;
+
+ if (!xinited) {
+ /* Necessary for threaded apps, of no consequence otherwise */
+ /* need only be called once, but must be called before *any* */
+ /* Xlib call is made. */
+ XInitThreads();
+ xinited = 1;
+ }
+#endif
+ display = XOpenDisplay(displayNameStr);
if (display == NULL) {
return NULL;
}