From 89b52891fd37293e596c75f49fb5202d83155677 Mon Sep 17 00:00:00 2001
From: Andres Rodriguez <andresx7@gmail.com>
Date: Mon, 16 Oct 2017 20:10:31 -0400
Subject: [PATCH] mesa: add support for semaphore object signal/wait v3
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Memory synchronization is left for a future patch.

v2: flush vertices/bitmaps moved to mesa/main
v3: removed spaces before/after braces

Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
---
 src/mesa/main/dd.h              | 14 ++++++++++++++
 src/mesa/main/externalobjects.c | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index c80af0b..8216752 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -1150,6 +1150,20 @@ struct dd_function_table {
     */
    void (*DeleteSemaphoreObject)(struct gl_context *ctx,
                                  struct gl_semaphore_object *semObj);
+
+   /**
+    * Introduce an operation to wait for the semaphore object in the GL
+    * server's command stream
+    */
+   void (*ServerWaitSemaphoreObject)(struct gl_context *ctx,
+                                     struct gl_semaphore_object *semObj);
+
+   /**
+    * Introduce an operation to signal the semaphore object in the GL
+    * server's command stream
+    */
+   void (*ServerSignalSemaphoreObject)(struct gl_context *ctx,
+                                       struct gl_semaphore_object *semObj);
    /*@}*/
 
    /**
diff --git a/src/mesa/main/externalobjects.c b/src/mesa/main/externalobjects.c
index b72fe13..9ba70c8 100644
--- a/src/mesa/main/externalobjects.c
+++ b/src/mesa/main/externalobjects.c
@@ -23,6 +23,7 @@
 
 #include "macros.h"
 #include "mtypes.h"
+#include "context.h"
 #include "externalobjects.h"
 #include "teximage.h"
 #include "texobj.h"
@@ -713,7 +714,26 @@ _mesa_WaitSemaphoreEXT(GLuint semaphore,
                        const GLuint *textures,
                        const GLenum *srcLayouts)
 {
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_semaphore_object *semObj;
+
+
+   if (!ctx->Extensions.EXT_semaphore) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glWaitSemaphoreEXT(unsupported)");
+      return;
+   }
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   semObj = _mesa_lookup_semaphore_object(ctx, semaphore);
+   if (!semObj)
+      return;
+
+   FLUSH_VERTICES(ctx, 0);
+   FLUSH_CURRENT(ctx, 0);
 
+   /* TODO: memory barriers and layout transitions */
+   ctx->Driver.ServerWaitSemaphoreObject(ctx, semObj);
 }
 
 void GLAPIENTRY
@@ -724,7 +744,25 @@ _mesa_SignalSemaphoreEXT(GLuint semaphore,
                          const GLuint *textures,
                          const GLenum *dstLayouts)
 {
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_semaphore_object *semObj;
+
+   if (!ctx->Extensions.EXT_semaphore) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glSignalSemaphoreEXT(unsupported)");
+      return;
+   }
+
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   semObj = _mesa_lookup_semaphore_object(ctx, semaphore);
+   if (!semObj)
+      return;
+
+   FLUSH_VERTICES(ctx, 0);
+   FLUSH_CURRENT(ctx, 0);
 
+   /* TODO: memory barriers and layout transitions */
+   ctx->Driver.ServerSignalSemaphoreObject(ctx, semObj);
 }
 
 void GLAPIENTRY
-- 
2.7.4