mesa: Move is_power_of_two() function from brw_context.h to macros.h.

[mesa.git] / src / mesa / swrast / s_texcombine.c

diff --git a/src/mesa/swrast/s_texcombine.c b/src/mesa/swrast/s_texcombine.c
index 523fea15afd910a8b520f3015a420994fc95a020..32d7c094447dbf0f939ff5c431084014e8fbaf45 100644 (file)
--- a/src/mesa/swrast/s_texcombine.c
+++ b/src/mesa/swrast/s_texcombine.c
@@ -1,6 +1,5 @@
 /*
  * Mesa 3-D graphics library
- * Version:  7.5
  *
  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
  * Copyright (C) 2009  VMware, Inc.   All Rights Reserved.
@@ -603,6 +602,14 @@ _swrast_texture_span( struct gl_context *ctx, SWspan *span )
    if (!swrast->TexelBuffer) {
 #ifdef _OPENMP
       const GLint maxThreads = omp_get_max_threads();
+
+      /* TexelBuffer memory allocation needs to be done in a critical section
+       * as this code runs in a parallel loop.
+       * When entering the section, first check if TexelBuffer has been
+       * initialized already by another thread while this thread was waiting.
+       */
+      #pragma omp critical
+      if (!swrast->TexelBuffer) {
 #else
       const GLint maxThreads = 1;
 #endif
@@ -612,8 +619,12 @@ _swrast_texture_span( struct gl_context *ctx, SWspan *span )
        * thread.
        */
       swrast->TexelBuffer =
-        malloc(ctx->Const.MaxTextureImageUnits * maxThreads *
+        malloc(ctx->Const.Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits * maxThreads *
                            SWRAST_MAX_WIDTH * 4 * sizeof(GLfloat));
+#ifdef _OPENMP
+      } /* critical section */
+#endif
+
       if (!swrast->TexelBuffer) {
         _mesa_error(ctx, GL_OUT_OF_MEMORY, "texture_combine");
         return;