From 55acd0d5a64a2ee6b0cecc75872fbf8c4bb42a0c Mon Sep 17 00:00:00 2001
From: Michel Daenzer <michel@daenzer.net>
Date: Wed, 25 Sep 2002 17:18:19 +0000
Subject: common ioctl to wait for vertical blank IRQs

---
 libdrm/xf86drm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'libdrm')

diff --git a/libdrm/xf86drm.c b/libdrm/xf86drm.c
index d2ce5e1e..8d3a20d1 100644
--- a/libdrm/xf86drm.c
+++ b/libdrm/xf86drm.c
@@ -1105,6 +1105,17 @@ int drmScatterGatherFree(int fd, unsigned long handle)
     return 0;
 }
 
+int drmWaitVBlank(int fd, drmVBlankPtr vbl)
+{
+    int ret;
+
+    do {
+       ret = ioctl(fd, DRM_IOCTL_WAIT_VBLANK, vbl);
+    } while (ret && errno == EINTR);
+
+    return ret;
+}
+
 int drmError(int err, const char *label)
 {
     switch (err) {
-- 
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