mesa: move shared context state functions to new shared.c file

3 files changed, 408 insertions, 366 deletions

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index a27aaf021cd..9fd9e769d29 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -133,6 +133,7 @@
 #include "rastpos.h"
 #endif
 #include "scissor.h"
+#include "shared.h"
 #include "simple_list.h"
 #include "state.h"
 #include "stencil.h"
@@ -446,362 +447,6 @@ one_time_init( GLcontext *ctx )
 
 
 /**
- * Allocate and initialize a shared context state structure.
- * Initializes the display list, texture objects and vertex programs hash
- * tables, allocates the texture objects. If it runs out of memory, frees
- * everything already allocated before returning NULL.
- *
- * \return pointer to a gl_shared_state structure on success, or NULL on
- * failure.
- */
-static GLboolean
-alloc_shared_state( GLcontext *ctx )
-{
-   GLuint i;
-   struct gl_shared_state *ss = CALLOC_STRUCT(gl_shared_state);
-   if (!ss)
-      return GL_FALSE;
-
-   ctx->Shared = ss;
-
-   _glthread_INIT_MUTEX(ss->Mutex);
-
-   ss->DisplayList = _mesa_NewHashTable();
-   ss->TexObjects = _mesa_NewHashTable();
-   ss->Programs = _mesa_NewHashTable();
-
-#if FEATURE_ARB_vertex_program
-   ss->DefaultVertexProgram = (struct gl_vertex_program *)
-      ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
-   if (!ss->DefaultVertexProgram)
-      goto cleanup;
-#endif
-#if FEATURE_ARB_fragment_program
-   ss->DefaultFragmentProgram = (struct gl_fragment_program *)
-      ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
-   if (!ss->DefaultFragmentProgram)
-      goto cleanup;
-#endif
-#if FEATURE_ATI_fragment_shader
-   ss->ATIShaders = _mesa_NewHashTable();
-   ss->DefaultFragmentShader = _mesa_new_ati_fragment_shader(ctx, 0);
-   if (!ss->DefaultFragmentShader)
-      goto cleanup;
-#endif
-
-#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
-   ss->BufferObjects = _mesa_NewHashTable();
-#endif
-
-   ss->ArrayObjects = _mesa_NewHashTable();
-
-#if FEATURE_ARB_shader_objects
-   ss->ShaderObjects = _mesa_NewHashTable();
-#endif
-
-   /* Create default texture objects */
-   for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
-      /* NOTE: the order of these enums matches the TEXTURE_x_INDEX values */
-      static const GLenum targets[NUM_TEXTURE_TARGETS] = {
-         GL_TEXTURE_2D_ARRAY_EXT,
-         GL_TEXTURE_1D_ARRAY_EXT,
-         GL_TEXTURE_CUBE_MAP,
-         GL_TEXTURE_3D,
-         GL_TEXTURE_RECTANGLE_NV,
-         GL_TEXTURE_2D,
-         GL_TEXTURE_1D
-      };
-      ss->DefaultTex[i] = ctx->Driver.NewTextureObject(ctx, 0, targets[i]);
-      if (!ss->DefaultTex[i])
-         goto cleanup;
-   }
-
-   /* sanity check */
-   assert(ss->DefaultTex[TEXTURE_1D_INDEX]->RefCount == 1);
-
-   _glthread_INIT_MUTEX(ss->TexMutex);
-   ss->TextureStateStamp = 0;
-
-#if FEATURE_EXT_framebuffer_object
-   ss->FrameBuffers = _mesa_NewHashTable();
-   if (!ss->FrameBuffers)
-      goto cleanup;
-   ss->RenderBuffers = _mesa_NewHashTable();
-   if (!ss->RenderBuffers)
-      goto cleanup;
-#endif
-
-   return GL_TRUE;
-
-cleanup:
-   /* Ran out of memory at some point.  Free everything and return NULL */
-   if (ss->DisplayList)
-      _mesa_DeleteHashTable(ss->DisplayList);
-   if (ss->TexObjects)
-      _mesa_DeleteHashTable(ss->TexObjects);
-   if (ss->Programs)
-      _mesa_DeleteHashTable(ss->Programs);
-#if FEATURE_ARB_vertex_program
-   _mesa_reference_vertprog(ctx, &ss->DefaultVertexProgram, NULL);
-#endif
-#if FEATURE_ARB_fragment_program
-   _mesa_reference_fragprog(ctx, &ss->DefaultFragmentProgram, NULL);
-#endif
-#if FEATURE_ATI_fragment_shader
-   if (ss->DefaultFragmentShader)
-      _mesa_delete_ati_fragment_shader(ctx, ss->DefaultFragmentShader);
-#endif
-#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
-   if (ss->BufferObjects)
-      _mesa_DeleteHashTable(ss->BufferObjects);
-#endif
-
-   if (ss->ArrayObjects)
-      _mesa_DeleteHashTable (ss->ArrayObjects);
-
-#if FEATURE_ARB_shader_objects
-   if (ss->ShaderObjects)
-      _mesa_DeleteHashTable (ss->ShaderObjects);
-#endif
-
-#if FEATURE_EXT_framebuffer_object
-   if (ss->FrameBuffers)
-      _mesa_DeleteHashTable(ss->FrameBuffers);
-   if (ss->RenderBuffers)
-      _mesa_DeleteHashTable(ss->RenderBuffers);
-#endif
-
-   for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
-      if (ss->DefaultTex[i])
-         ctx->Driver.DeleteTexture(ctx, ss->DefaultTex[i]);
-   }
-
-   _mesa_free(ss);
-
-   return GL_FALSE;
-}
-
-
-/**
- * Callback for deleting a display list.  Called by _mesa_HashDeleteAll().
- */
-static void
-delete_displaylist_cb(GLuint id, void *data, void *userData)
-{
-#if FEATURE_dlist
-   struct gl_display_list *list = (struct gl_display_list *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   _mesa_delete_list(ctx, list);
-#endif
-}
-
-/**
- * Callback for deleting a texture object.  Called by _mesa_HashDeleteAll().
- */
-static void
-delete_texture_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_texture_object *texObj = (struct gl_texture_object *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   ctx->Driver.DeleteTexture(ctx, texObj);
-}
-
-/**
- * Callback for deleting a program object.  Called by _mesa_HashDeleteAll().
- */
-static void
-delete_program_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_program *prog = (struct gl_program *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   ASSERT(prog->RefCount == 1); /* should only be referenced by hash table */
-   prog->RefCount = 0;  /* now going away */
-   ctx->Driver.DeleteProgram(ctx, prog);
-}
-
-#if FEATURE_ATI_fragment_shader
-/**
- * Callback for deleting an ATI fragment shader object.
- * Called by _mesa_HashDeleteAll().
- */
-static void
-delete_fragshader_cb(GLuint id, void *data, void *userData)
-{
-   struct ati_fragment_shader *shader = (struct ati_fragment_shader *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   _mesa_delete_ati_fragment_shader(ctx, shader);
-}
-#endif
-
-/**
- * Callback for deleting a buffer object.  Called by _mesa_HashDeleteAll().
- */
-static void
-delete_bufferobj_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_buffer_object *bufObj = (struct gl_buffer_object *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   ctx->Driver.DeleteBuffer(ctx, bufObj);
-}
-
-/**
- * Callback for deleting an array object.  Called by _mesa_HashDeleteAll().
- */
-static void
-delete_arrayobj_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_array_object *arrayObj = (struct gl_array_object *) data;
-   GLcontext *ctx = (GLcontext *) userData;
-   _mesa_delete_array_object(ctx, arrayObj);
-}
-
-/**
- * Callback for freeing shader program data. Call it before delete_shader_cb
- * to avoid memory access error.
- */
-static void
-free_shader_program_data_cb(GLuint id, void *data, void *userData)
-{
-   GLcontext *ctx = (GLcontext *) userData;
-   struct gl_shader_program *shProg = (struct gl_shader_program *) data;
-
-   if (shProg->Type == GL_SHADER_PROGRAM_MESA) {
-       _mesa_free_shader_program_data(ctx, shProg);
-   }
-}
-
-/**
- * Callback for deleting shader and shader programs objects.
- * Called by _mesa_HashDeleteAll().
- */
-static void
-delete_shader_cb(GLuint id, void *data, void *userData)
-{
-   GLcontext *ctx = (GLcontext *) userData;
-   struct gl_shader *sh = (struct gl_shader *) data;
-   if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
-      _mesa_free_shader(ctx, sh);
-   }
-   else {
-      struct gl_shader_program *shProg = (struct gl_shader_program *) data;
-      ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
-      _mesa_free_shader_program(ctx, shProg);
-   }
-}
-
-/**
- * Callback for deleting a framebuffer object.  Called by _mesa_HashDeleteAll()
- */
-static void
-delete_framebuffer_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
-   /* The fact that the framebuffer is in the hashtable means its refcount
-    * is one, but we're removing from the hashtable now.  So clear refcount.
-    */
-   /*assert(fb->RefCount == 1);*/
-   fb->RefCount = 0;
-
-   /* NOTE: Delete should always be defined but there are two reports
-    * of it being NULL (bugs 13507, 14293).  Work-around for now.
-    */
-   if (fb->Delete)
-      fb->Delete(fb);
-}
-
-/**
- * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
- */
-static void
-delete_renderbuffer_cb(GLuint id, void *data, void *userData)
-{
-   struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
-   rb->RefCount = 0;  /* see comment for FBOs above */
-   if (rb->Delete)
-      rb->Delete(rb);
-}
-
-
-/**
- * Deallocate a shared state object and all children structures.
- *
- * \param ctx GL context.
- * \param ss shared state pointer.
- * 
- * Frees the display lists, the texture objects (calling the driver texture
- * deletion callback to free its private data) and the vertex programs, as well
- * as their hash tables.
- *
- * \sa alloc_shared_state().
- */
-static void
-free_shared_state( GLcontext *ctx, struct gl_shared_state *ss )
-{
-   GLuint i;
-
-   /*
-    * Free display lists
-    */
-   _mesa_HashDeleteAll(ss->DisplayList, delete_displaylist_cb, ctx);
-   _mesa_DeleteHashTable(ss->DisplayList);
-
-#if FEATURE_ARB_shader_objects
-   _mesa_HashWalk(ss->ShaderObjects, free_shader_program_data_cb, ctx);
-   _mesa_HashDeleteAll(ss->ShaderObjects, delete_shader_cb, ctx);
-   _mesa_DeleteHashTable(ss->ShaderObjects);
-#endif
-
-   _mesa_HashDeleteAll(ss->Programs, delete_program_cb, ctx);
-   _mesa_DeleteHashTable(ss->Programs);
-
-#if FEATURE_ARB_vertex_program
-   _mesa_reference_vertprog(ctx, &ss->DefaultVertexProgram, NULL);
-#endif
-#if FEATURE_ARB_fragment_program
-   _mesa_reference_fragprog(ctx, &ss->DefaultFragmentProgram, NULL);
-#endif
-
-#if FEATURE_ATI_fragment_shader
-   _mesa_HashDeleteAll(ss->ATIShaders, delete_fragshader_cb, ctx);
-   _mesa_DeleteHashTable(ss->ATIShaders);
-   _mesa_delete_ati_fragment_shader(ctx, ss->DefaultFragmentShader);
-#endif
-
-#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
-   _mesa_HashDeleteAll(ss->BufferObjects, delete_bufferobj_cb, ctx);
-   _mesa_DeleteHashTable(ss->BufferObjects);
-#endif
-
-   _mesa_HashDeleteAll(ss->ArrayObjects, delete_arrayobj_cb, ctx);
-   _mesa_DeleteHashTable(ss->ArrayObjects);
-
-#if FEATURE_EXT_framebuffer_object
-   _mesa_HashDeleteAll(ss->FrameBuffers, delete_framebuffer_cb, ctx);
-   _mesa_DeleteHashTable(ss->FrameBuffers);
-   _mesa_HashDeleteAll(ss->RenderBuffers, delete_renderbuffer_cb, ctx);
-   _mesa_DeleteHashTable(ss->RenderBuffers);
-#endif
-
-   /*
-    * Free texture objects (after FBOs since some textures might have
-    * been bound to FBOs).
-    */
-   ASSERT(ctx->Driver.DeleteTexture);
-   /* the default textures */
-   for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
-      ctx->Driver.DeleteTexture(ctx, ss->DefaultTex[i]);
-   }
-   /* all other textures */
-   _mesa_HashDeleteAll(ss->TexObjects, delete_texture_cb, ctx);
-   _mesa_DeleteHashTable(ss->TexObjects);
-
-   _glthread_DESTROY_MUTEX(ss->Mutex);
-
-   _mesa_free(ss);
-}
-
-
-/**
  * Initialize fields of gl_current_attrib (aka ctx->Current.*)
  */
 static void
@@ -1180,6 +825,8 @@ _mesa_initialize_context(GLcontext *ctx,
                          const struct dd_function_table *driverFunctions,
                          void *driverContext)
 {
+   struct gl_shared_state *shared;
+
    /*ASSERT(driverContext);*/
    assert(driverFunctions->NewTextureObject);
    assert(driverFunctions->FreeTexImageData);
@@ -1203,20 +850,22 @@ _mesa_initialize_context(GLcontext *ctx,
 
    if (share_list) {
       /* share state with another context */
-      ctx->Shared = share_list->Shared;
+      shared = share_list->Shared;
    }
    else {
       /* allocate new, unshared state */
-      if (!alloc_shared_state( ctx )) {
+      shared = _mesa_alloc_shared_state(ctx);
+      if (!shared)
          return GL_FALSE;
-      }
    }
-   _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
-   ctx->Shared->RefCount++;
-   _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
+
+   _glthread_LOCK_MUTEX(shared->Mutex);
+   ctx->Shared = shared;
+   shared->RefCount++;
+   _glthread_UNLOCK_MUTEX(shared->Mutex);
 
    if (!init_attrib_groups( ctx )) {
-      free_shared_state(ctx, ctx->Shared);
+      _mesa_free_shared_state(ctx, ctx->Shared);
       return GL_FALSE;
    }
 
@@ -1224,7 +873,7 @@ _mesa_initialize_context(GLcontext *ctx,
    ctx->Exec = alloc_dispatch_table();
    ctx->Save = alloc_dispatch_table();
    if (!ctx->Exec || !ctx->Save) {
-      free_shared_state(ctx, ctx->Shared);
+      _mesa_free_shared_state(ctx, ctx->Shared);
       if (ctx->Exec)
          _mesa_free(ctx->Exec);
    }
@@ -1369,7 +1018,7 @@ _mesa_free_context_data( GLcontext *ctx )
    assert(RefCount >= 0);
    if (RefCount == 0) {
       /* free shared state */
-      free_shared_state( ctx, ctx->Shared );
+      _mesa_free_shared_state( ctx, ctx->Shared );
    }
 
    if (ctx->Extensions.String)
@@ -1753,7 +1402,7 @@ _mesa_share_state(GLcontext *ctx, GLcontext *ctxToShare)
 
       oldSharedState->RefCount--;
       if (oldSharedState->RefCount == 0) {
-         free_shared_state(ctx, oldSharedState);
+         _mesa_free_shared_state(ctx, oldSharedState);
       }
 
       return GL_TRUE;
diff --git a/src/mesa/main/shared.c b/src/mesa/main/shared.c
new file mode 100644
index 00000000000..936ee9061ba
--- /dev/null
+++ b/src/mesa/main/shared.c
@@ -0,0 +1,356 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.5
+ *
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file shared.c
+ * Shared-context state
+ */
+
+
+
+#include "imports.h"
+#include "mtypes.h"
+#include "hash.h"
+#include "arrayobj.h"
+#include "shared.h"
+#include "shader/program.h"
+#include "shader/shader_api.h"
+#if FEATURE_dlist
+#include "dlist.h"
+#endif
+#if FEATURE_ATI_fragment_shader
+#include "shader/atifragshader.h"
+#endif
+
+
+/**
+ * Allocate and initialize a shared context state structure.
+ * Initializes the display list, texture objects and vertex programs hash
+ * tables, allocates the texture objects. If it runs out of memory, frees
+ * everything already allocated before returning NULL.
+ *
+ * \return pointer to a gl_shared_state structure on success, or NULL on
+ * failure.
+ */
+struct gl_shared_state *
+_mesa_alloc_shared_state(GLcontext *ctx)
+{
+   struct gl_shared_state *shared;
+   GLuint i;
+
+   shared = CALLOC_STRUCT(gl_shared_state);
+   if (!shared)
+      return NULL;
+
+   _glthread_INIT_MUTEX(shared->Mutex);
+
+   shared->DisplayList = _mesa_NewHashTable();
+   shared->TexObjects = _mesa_NewHashTable();
+   shared->Programs = _mesa_NewHashTable();
+
+#if FEATURE_ARB_vertex_program
+   shared->DefaultVertexProgram = (struct gl_vertex_program *)
+      ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
+#endif
+
+#if FEATURE_ARB_fragment_program
+   shared->DefaultFragmentProgram = (struct gl_fragment_program *)
+      ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
+#endif
+
+#if FEATURE_ATI_fragment_shader
+   shared->ATIShaders = _mesa_NewHashTable();
+   shared->DefaultFragmentShader = _mesa_new_ati_fragment_shader(ctx, 0);
+#endif
+
+#if FEATURE_ARB_shader_objects
+   shared->ShaderObjects = _mesa_NewHashTable();
+#endif
+
+#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
+   shared->BufferObjects = _mesa_NewHashTable();
+#endif
+
+   shared->ArrayObjects = _mesa_NewHashTable();
+
+   /* Create default texture objects */
+   for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
+      /* NOTE: the order of these enums matches the TEXTURE_x_INDEX values */
+      static const GLenum targets[NUM_TEXTURE_TARGETS] = {
+         GL_TEXTURE_2D_ARRAY_EXT,
+         GL_TEXTURE_1D_ARRAY_EXT,
+         GL_TEXTURE_CUBE_MAP,
+         GL_TEXTURE_3D,
+         GL_TEXTURE_RECTANGLE_NV,
+         GL_TEXTURE_2D,
+         GL_TEXTURE_1D
+      };
+      shared->DefaultTex[i] = ctx->Driver.NewTextureObject(ctx, 0, targets[i]);
+   }
+
+   /* sanity check */
+   assert(shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount == 1);
+
+   /* Mutex and timestamp for texobj state validation */
+   _glthread_INIT_MUTEX(shared->TexMutex);
+   shared->TextureStateStamp = 0;
+
+#if FEATURE_EXT_framebuffer_object
+   shared->FrameBuffers = _mesa_NewHashTable();
+   shared->RenderBuffers = _mesa_NewHashTable();
+#endif
+
+   return shared;
+}
+
+
+/**
+ * Callback for deleting a display list.  Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_displaylist_cb(GLuint id, void *data, void *userData)
+{
+#if FEATURE_dlist
+   struct gl_display_list *list = (struct gl_display_list *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   _mesa_delete_list(ctx, list);
+#endif
+}
+
+
+/**
+ * Callback for deleting a texture object.  Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_texture_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_texture_object *texObj = (struct gl_texture_object *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   ctx->Driver.DeleteTexture(ctx, texObj);
+}
+
+
+/**
+ * Callback for deleting a program object.  Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_program_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_program *prog = (struct gl_program *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   ASSERT(prog->RefCount == 1); /* should only be referenced by hash table */
+   prog->RefCount = 0;  /* now going away */
+   ctx->Driver.DeleteProgram(ctx, prog);
+}
+
+
+#if FEATURE_ATI_fragment_shader
+/**
+ * Callback for deleting an ATI fragment shader object.
+ * Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_fragshader_cb(GLuint id, void *data, void *userData)
+{
+   struct ati_fragment_shader *shader = (struct ati_fragment_shader *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   _mesa_delete_ati_fragment_shader(ctx, shader);
+}
+#endif
+
+
+/**
+ * Callback for deleting a buffer object.  Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_bufferobj_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_buffer_object *bufObj = (struct gl_buffer_object *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   ctx->Driver.DeleteBuffer(ctx, bufObj);
+}
+
+
+/**
+ * Callback for deleting an array object.  Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_arrayobj_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_array_object *arrayObj = (struct gl_array_object *) data;
+   GLcontext *ctx = (GLcontext *) userData;
+   _mesa_delete_array_object(ctx, arrayObj);
+}
+
+
+/**
+ * Callback for freeing shader program data. Call it before delete_shader_cb
+ * to avoid memory access error.
+ */
+static void
+free_shader_program_data_cb(GLuint id, void *data, void *userData)
+{
+   GLcontext *ctx = (GLcontext *) userData;
+   struct gl_shader_program *shProg = (struct gl_shader_program *) data;
+
+   if (shProg->Type == GL_SHADER_PROGRAM_MESA) {
+       _mesa_free_shader_program_data(ctx, shProg);
+   }
+}
+
+
+/**
+ * Callback for deleting shader and shader programs objects.
+ * Called by _mesa_HashDeleteAll().
+ */
+static void
+delete_shader_cb(GLuint id, void *data, void *userData)
+{
+   GLcontext *ctx = (GLcontext *) userData;
+   struct gl_shader *sh = (struct gl_shader *) data;
+   if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
+      _mesa_free_shader(ctx, sh);
+   }
+   else {
+      struct gl_shader_program *shProg = (struct gl_shader_program *) data;
+      ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
+      _mesa_free_shader_program(ctx, shProg);
+   }
+}
+
+
+/**
+ * Callback for deleting a framebuffer object.  Called by _mesa_HashDeleteAll()
+ */
+static void
+delete_framebuffer_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
+   /* The fact that the framebuffer is in the hashtable means its refcount
+    * is one, but we're removing from the hashtable now.  So clear refcount.
+    */
+   /*assert(fb->RefCount == 1);*/
+   fb->RefCount = 0;
+
+   /* NOTE: Delete should always be defined but there are two reports
+    * of it being NULL (bugs 13507, 14293).  Work-around for now.
+    */
+   if (fb->Delete)
+      fb->Delete(fb);
+}
+
+
+/**
+ * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
+ */
+static void
+delete_renderbuffer_cb(GLuint id, void *data, void *userData)
+{
+   struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
+   rb->RefCount = 0;  /* see comment for FBOs above */
+   if (rb->Delete)
+      rb->Delete(rb);
+}
+
+
+/**
+ * Deallocate a shared state object and all children structures.
+ *
+ * \param ctx GL context.
+ * \param ss shared state pointer.
+ * 
+ * Frees the display lists, the texture objects (calling the driver texture
+ * deletion callback to free its private data) and the vertex programs, as well
+ * as their hash tables.
+ *
+ * \sa alloc_shared_state().
+ */
+void
+_mesa_free_shared_state(GLcontext *ctx, struct gl_shared_state *shared)
+{
+   GLuint i;
+
+   /*
+    * Free display lists
+    */
+   _mesa_HashDeleteAll(shared->DisplayList, delete_displaylist_cb, ctx);
+   _mesa_DeleteHashTable(shared->DisplayList);
+
+#if FEATURE_ARB_shader_objects
+   _mesa_HashWalk(shared->ShaderObjects, free_shader_program_data_cb, ctx);
+   _mesa_HashDeleteAll(shared->ShaderObjects, delete_shader_cb, ctx);
+   _mesa_DeleteHashTable(shared->ShaderObjects);
+#endif
+
+   _mesa_HashDeleteAll(shared->Programs, delete_program_cb, ctx);
+   _mesa_DeleteHashTable(shared->Programs);
+
+   _mesa_HashDeleteAll(shared->ArrayObjects, delete_arrayobj_cb, ctx);
+   _mesa_DeleteHashTable(shared->ArrayObjects);
+
+#if FEATURE_ARB_vertex_program
+   _mesa_reference_vertprog(ctx, &shared->DefaultVertexProgram, NULL);
+#endif
+
+#if FEATURE_ARB_fragment_program
+   _mesa_reference_fragprog(ctx, &shared->DefaultFragmentProgram, NULL);
+#endif
+
+#if FEATURE_ATI_fragment_shader
+   _mesa_HashDeleteAll(shared->ATIShaders, delete_fragshader_cb, ctx);
+   _mesa_DeleteHashTable(shared->ATIShaders);
+   _mesa_delete_ati_fragment_shader(ctx, shared->DefaultFragmentShader);
+#endif
+
+#if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
+   _mesa_HashDeleteAll(shared->BufferObjects, delete_bufferobj_cb, ctx);
+   _mesa_DeleteHashTable(shared->BufferObjects);
+#endif
+
+#if FEATURE_EXT_framebuffer_object
+   _mesa_HashDeleteAll(shared->FrameBuffers, delete_framebuffer_cb, ctx);
+   _mesa_DeleteHashTable(shared->FrameBuffers);
+   _mesa_HashDeleteAll(shared->RenderBuffers, delete_renderbuffer_cb, ctx);
+   _mesa_DeleteHashTable(shared->RenderBuffers);
+#endif
+
+   /*
+    * Free texture objects (after FBOs since some textures might have
+    * been bound to FBOs).
+    */
+   ASSERT(ctx->Driver.DeleteTexture);
+   /* the default textures */
+   for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
+      ctx->Driver.DeleteTexture(ctx, shared->DefaultTex[i]);
+   }
+
+   /* all other textures */
+   _mesa_HashDeleteAll(shared->TexObjects, delete_texture_cb, ctx);
+   _mesa_DeleteHashTable(shared->TexObjects);
+
+   _glthread_DESTROY_MUTEX(shared->Mutex);
+   _glthread_DESTROY_MUTEX(shared->TexMutex);
+
+   _mesa_free(shared);
+}
diff --git a/src/mesa/main/shared.h b/src/mesa/main/shared.h
new file mode 100644
index 00000000000..e59177e968e
--- /dev/null
+++ b/src/mesa/main/shared.h
@@ -0,0 +1,37 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.5
+ *
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef SHARED_H
+#define SHARED_H
+
+
+struct gl_shared_state *
+_mesa_alloc_shared_state(GLcontext *ctx);
+
+
+void
+_mesa_free_shared_state(GLcontext *ctx, struct gl_shared_state *shared);
+
+
+#endif