llvmpipe: add lp_fence_timedwait() helper

[mesa.git] / src / gallium / drivers / llvmpipe / lp_fence.c

diff --git a/src/gallium/drivers/llvmpipe/lp_fence.c b/src/gallium/drivers/llvmpipe/lp_fence.c
index 20cd91cd63dadb438d540a2bd608657431de04f8..00cd79d6ba675050bb281c333fb180ded3de022b 100644 (file)
--- a/src/gallium/drivers/llvmpipe/lp_fence.c
+++ b/src/gallium/drivers/llvmpipe/lp_fence.c
@@ -125,3 +125,32 @@ 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;
+   }
+   const boolean result = (f->count >= f->rank);
+   mtx_unlock(&f->mutex);
+   return result;
+}