XQuartz: mieq: Wait for the server to finish initializing before letting other threads mieqEnqueue

Avoid possible race condition whereby one thread might call mieqEnqueue before InitAndStartDevices finishes
(cherry picked from commit 94e417ac87a98cd5c6bf2d7c495d702748398931)

1 files changed, 14 insertions, 0 deletions

diff --git a/dix/main.c b/dix/main.c
index 4a062b7f1..069a17b66 100644
--- a/dix/main.c
+++ b/dix/main.c
@@ -233,6 +233,12 @@ static int indexForScanlinePad[ 65 ] = {
 #endif
 
 #ifdef XQUARTZ
+#include <pthread.h>
+
+BOOL serverInitComplete = FALSE;
+pthread_mutex_t serverInitCompleteMutex = PTHREAD_MUTEX_INITIALIZER;
+pthread_cond_t serverInitCompleteCond = PTHREAD_COND_INITIALIZER;
+
 int dix_main(int argc, char *argv[], char *envp[])
 #else
 int main(int argc, char *argv[], char *envp[])
@@ -377,6 +383,14 @@ int main(int argc, char *argv[], char *envp[])
 	    }
 	}
 
+#ifdef XQUARTZ
+    /* Let the other threads know the server is done with its init */
+    pthread_mutex_lock(&serverInitCompleteMutex);
+    serverInitComplete = TRUE;
+    pthread_cond_broadcast(&serverInitCompleteCond);
+    pthread_mutex_unlock(&serverInitCompleteMutex);
+#endif
+        
 	NotifyParentProcess();
 
 	Dispatch();