From 4b70af918dd9040a6987c6a55e76e49f0e3f90bf Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Fri, 11 Dec 2009 17:57:45 -0700
Subject: [PATCH] llvmpipe: added lp_rast_fence() bin function

---
 src/gallium/drivers/llvmpipe/lp_rast.c | 25 +++++++++++++++++++++++++
 src/gallium/drivers/llvmpipe/lp_rast.h | 14 ++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/src/gallium/drivers/llvmpipe/lp_rast.c b/src/gallium/drivers/llvmpipe/lp_rast.c
index 6b7aa8d..3e7b3d7 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast.c
+++ b/src/gallium/drivers/llvmpipe/lp_rast.c
@@ -32,6 +32,7 @@
 
 #include "lp_bin_queue.h"
 #include "lp_debug.h"
+#include "lp_fence.h"
 #include "lp_state.h"
 #include "lp_rast.h"
 #include "lp_rast_priv.h"
@@ -506,6 +507,30 @@ lp_rast_end_tile( struct lp_rasterizer *rast,
 
 
 /**
+ * Signal on a fence.  This is called during bin execution/rasterization.
+ * Called per thread.
+ */
+void lp_rast_fence( struct lp_rasterizer *rast,
+                    unsigned thread_index,
+                    const union lp_rast_cmd_arg arg )
+{
+   struct lp_fence *fence = arg.fence;
+
+   pipe_mutex_lock( fence->mutex );
+
+   fence->count++;
+   assert(fence->count <= fence->rank);
+
+   LP_DBG(DEBUG_RAST, "%s count=%u rank=%u\n", __FUNCTION__,
+          fence->count, fence->rank);
+
+   pipe_condvar_signal( fence->signalled );
+
+   pipe_mutex_unlock( fence->mutex );
+}
+
+
+/**
  * When all the threads are done rasterizing a bin, one thread will
  * call this function to reset the bin and put it onto the empty queue.
  */
diff --git a/src/gallium/drivers/llvmpipe/lp_rast.h b/src/gallium/drivers/llvmpipe/lp_rast.h
index 785be49..bd8f1ae 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast.h
+++ b/src/gallium/drivers/llvmpipe/lp_rast.h
@@ -44,6 +44,7 @@
 struct lp_rasterizer;
 struct lp_bins;
 struct lp_bins_queue;
+struct lp_fence;
 struct cmd_bin;
 struct pipe_screen;
 
@@ -148,6 +149,7 @@ union lp_rast_cmd_arg {
    const struct lp_rast_state *set_state;
    uint8_t clear_color[4];
    unsigned clear_zstencil;
+   struct lp_fence *fence;
 };
 
 
@@ -178,6 +180,15 @@ lp_rast_arg_state( const struct lp_rast_state *state )
 }
 
 static INLINE const union lp_rast_cmd_arg
+lp_rast_arg_fence( struct lp_fence *fence )
+{
+   union lp_rast_cmd_arg arg;
+   arg.fence = fence;
+   return arg;
+}
+
+
+static INLINE const union lp_rast_cmd_arg
 lp_rast_arg_null( void )
 {
    union lp_rast_cmd_arg arg;
@@ -221,5 +232,8 @@ void lp_rast_shade_tile( struct lp_rasterizer *,
                          unsigned thread_index,
                          const union lp_rast_cmd_arg );
 
+void lp_rast_fence( struct lp_rasterizer *,
+                    unsigned thread_index,
+                    const union lp_rast_cmd_arg );
 
 #endif
-- 
2.7.4