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-rw-r--r--meta/recipes-graphics/mesa/mesa-demos/0010-sharedtex_mt-fix-rendering-thread-hang.patch43
1 files changed, 43 insertions, 0 deletions
diff --git a/meta/recipes-graphics/mesa/mesa-demos/0010-sharedtex_mt-fix-rendering-thread-hang.patch b/meta/recipes-graphics/mesa/mesa-demos/0010-sharedtex_mt-fix-rendering-thread-hang.patch
new file mode 100644
index 0000000000..04e1b446f3
--- /dev/null
+++ b/meta/recipes-graphics/mesa/mesa-demos/0010-sharedtex_mt-fix-rendering-thread-hang.patch
@@ -0,0 +1,43 @@
1From 525fa9ded72d22b53c5eb366f61e2ac1d407a2db Mon Sep 17 00:00:00 2001
2From: Awais Belal <awais_belal@mentor.com>
3Date: Thu, 8 Oct 2015 13:49:31 +0500
4Subject: [PATCH] sharedtex_mt: fix rendering thread hang
5
6XNextEvent is a blocking call which locks up the display mutex
7this causes the rendering threads to hang when they try call
8glXSwapBuffers() as that tries to take the same mutex in
9underlying calls through XCopyArea().
10So we only go to XNextEvent when it has at least one event
11and we wouldn't lock indefinitely.
12
13Signed-off-by: Awais Belal <awais_belal@mentor.com>
14Upstream-Status: Backport (2b304e765695d385fd3bf414e6e444020bedb0a8)
15
16---
17 src/xdemos/sharedtex_mt.c | 9 +++++++--
18 1 file changed, 7 insertions(+), 2 deletions(-)
19
20diff --git a/src/xdemos/sharedtex_mt.c b/src/xdemos/sharedtex_mt.c
21index a90903a..1d503c4 100644
22--- a/src/xdemos/sharedtex_mt.c
23+++ b/src/xdemos/sharedtex_mt.c
24@@ -420,9 +420,14 @@ Resize(struct window *h, unsigned int width, unsigned int height)
25 static void
26 EventLoop(void)
27 {
28+ int i;
29+ XEvent event;
30 while (1) {
31- int i;
32- XEvent event;
33+ /* Do we have an event? */
34+ if (XPending(gDpy) == 0) {
35+ usleep(10000);
36+ continue;
37+ }
38 XNextEvent(gDpy, &event);
39 for (i = 0; i < NumWindows; i++) {
40 struct window *h = &Windows[i];
41--
421.9.1
43