The function is analogous to lp_fence_wait() while taking at timeout
(ns) parameter, as needed for EGL fence/sync.
v2:
- use absolute UTC time, as per spec (Gustaw)
- bail out on cnd_timedwait() failure (Gustaw)
Cc: Gustaw Smolarczyk <wielkie...@gmail.com>
Cc: Roland Scheidegger <srol...@vmware.com>
Signed-off-by: Emil Velikov <emil.veli...@collabora.com>
Reviewed-by: Roland Scheidegger <srol...@vmware.com> (v1)
---
src/gallium/drivers/llvmpipe/lp_fence.c | 30 +++++++++++++++++++++++++
src/gallium/drivers/llvmpipe/lp_fence.h | 3 +++
2 files changed, 33 insertions(+)
diff --git a/src/gallium/drivers/llvmpipe/lp_fence.c
b/src/gallium/drivers/llvmpipe/lp_fence.c
index 20cd91cd63d..b79d773bf6c 100644
--- a/src/gallium/drivers/llvmpipe/lp_fence.c
+++ b/src/gallium/drivers/llvmpipe/lp_fence.c
@@ -125,3 +125,33 @@ lp_fence_wait(struct lp_fence *f)
}
+boolean
+lp_fence_timedwait(struct lp_fence *f, uint64_t timeout)
+{
+ struct timespec ts;
+ int ret;
+
+ timespec_get(&ts, TIME_UTC);
+
+ ts.tv_nsec += timeout % 1000000000L;
+ ts.tv_sec += timeout / 1000000000L;
+ if (ts.tv_nsec >= 1000000000L) {
+ ts.tv_sec++;
+ ts.tv_nsec -= 1000000000L;
+ }
+
+ if (LP_DEBUG & DEBUG_FENCE)
+ debug_printf("%s %d\n", __FUNCTION__, f->id);
+
+ mtx_lock(&f->mutex);
+ assert(f->issued);
+ while (f->count < f->rank) {
+ ret = cnd_timedwait(&f->signalled, &f->mutex, &ts);
+ if (ret != thrd_success)
+ break;
+ }
+ mtx_unlock(&f->mutex);
+ return (f->count >= f->rank && ret == thrd_success);
+}
+
+
diff --git a/src/gallium/drivers/llvmpipe/lp_fence.h
b/src/gallium/drivers/llvmpipe/lp_fence.h
index b72026492c6..5ba746d22d1 100644
--- a/src/gallium/drivers/llvmpipe/lp_fence.h
+++ b/src/gallium/drivers/llvmpipe/lp_fence.h
@@ -65,6 +65,9 @@ lp_fence_signalled(struct lp_fence *fence);
void
lp_fence_wait(struct lp_fence *fence);
+boolean
+lp_fence_timedwait(struct lp_fence *fence, uint64_t timeout);
+
void
llvmpipe_init_screen_fence_funcs(struct pipe_screen *screen);
--
2.20.1
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