+++ /dev/null
-/*
- * 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 <precomp.h>
-
-/**
- * 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(struct gl_context *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->BufferObjects = _mesa_NewHashTable();
-
- /* Allocate the default buffer object */
- shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0, 0);
-
- /* 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_CUBE_MAP,
- GL_TEXTURE_2D,
- GL_TEXTURE_1D
- };
- STATIC_ASSERT(Elements(targets) == NUM_TEXTURE_TARGETS);
- 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;
-
- return shared;
-}
-
-
-/**
- * Callback for deleting a display list. Called by _mesa_HashDeleteAll().
- */
-static void
-delete_displaylist_cb(GLuint id, void *data, void *userData)
-{
- struct gl_display_list *list = (struct gl_display_list *) data;
- struct gl_context *ctx = (struct gl_context *) userData;
- _mesa_delete_list(ctx, list);
-}
-
-
-/**
- * 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;
- struct gl_context *ctx = (struct gl_context *) userData;
- ctx->Driver.DeleteTexture(ctx, texObj);
-}
-
-
-/**
- * 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;
- struct gl_context *ctx = (struct gl_context *) userData;
- if (_mesa_bufferobj_mapped(bufObj)) {
- ctx->Driver.UnmapBuffer(ctx, bufObj);
- bufObj->Pointer = NULL;
- }
- _mesa_reference_buffer_object(ctx, &bufObj, NULL);
-}
-
-
-/**
- * Deallocate a shared state object and all children structures.
- *
- * \param ctx GL context.
- * \param shared 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(struct gl_context *ctx, struct gl_shared_state *shared)
-{
- GLuint i;
-
- /* Free the dummy/fallback texture object */
- if (shared->FallbackTex)
- ctx->Driver.DeleteTexture(ctx, shared->FallbackTex);
-
- /*
- * Free display lists
- */
- _mesa_HashDeleteAll(shared->DisplayList, delete_displaylist_cb, ctx);
- _mesa_DeleteHashTable(shared->DisplayList);
-
- _mesa_HashDeleteAll(shared->BufferObjects, delete_bufferobj_cb, ctx);
- _mesa_DeleteHashTable(shared->BufferObjects);
-
- _mesa_reference_buffer_object(ctx, &shared->NullBufferObj, NULL);
-
- /*
- * 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);
-
- free(shared);
-}
-
-
-/**
- * gl_shared_state objects are ref counted.
- * If ptr's refcount goes to zero, free the shared state.
- */
-void
-_mesa_reference_shared_state(struct gl_context *ctx,
- struct gl_shared_state **ptr,
- struct gl_shared_state *state)
-{
- if (*ptr == state)
- return;
-
- if (*ptr) {
- /* unref old state */
- struct gl_shared_state *old = *ptr;
- GLboolean delete;
-
- _glthread_LOCK_MUTEX(old->Mutex);
- assert(old->RefCount >= 1);
- old->RefCount--;
- delete = (old->RefCount == 0);
- _glthread_UNLOCK_MUTEX(old->Mutex);
-
- if (delete) {
- free_shared_state(ctx, old);
- }
-
- *ptr = NULL;
- }
-
- if (state) {
- /* reference new state */
- _glthread_LOCK_MUTEX(state->Mutex);
- state->RefCount++;
- *ptr = state;
- _glthread_UNLOCK_MUTEX(state->Mutex);
- }
-}
projects / reactos.git / blobdiff