src/mesa/main/shared.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file shared.c
  27  * Shared-context state
  28  */
  29
  30
  31
  32 #include "imports.h"
  33 #include "mtypes.h"
  34 #include "hash.h"
  35 #include "arrayobj.h"
  36 #include "bufferobj.h"
  37 #include "shared.h"
  38 #include "shader/program.h"
  39 #include "shader/shader_api.h"
  40 #include "dlist.h"
  41 #if FEATURE_ATI_fragment_shader
  42 #include "shader/atifragshader.h"
  43 #endif
  44 #if FEATURE_ARB_sync
  45 #include "syncobj.h"
  46 #endif
  47
  48 /**
  49  * Allocate and initialize a shared context state structure.
  50  * Initializes the display list, texture objects and vertex programs hash
  51  * tables, allocates the texture objects. If it runs out of memory, frees
  52  * everything already allocated before returning NULL.
  53  *
  54  * \return pointer to a gl_shared_state structure on success, or NULL on
  55  * failure.
  56  */
  57 struct gl_shared_state *
  58 _mesa_alloc_shared_state(GLcontext *ctx)
  59 {
  60    struct gl_shared_state *shared;
  61    GLuint i;
  62
  63    shared = CALLOC_STRUCT(gl_shared_state);
  64    if (!shared)
  65       return NULL;
  66
  67    _glthread_INIT_MUTEX(shared->Mutex);
  68
  69    shared->DisplayList = _mesa_NewHashTable();
  70    shared->TexObjects = _mesa_NewHashTable();
  71    shared->Programs = _mesa_NewHashTable();
  72
  73 #if FEATURE_ARB_vertex_program
  74    shared->DefaultVertexProgram = (struct gl_vertex_program *)
  75       ctx->Driver.NewProgram(ctx, GL_VERTEX_PROGRAM_ARB, 0);
  76 #endif
  77
  78 #if FEATURE_ARB_fragment_program
  79    shared->DefaultFragmentProgram = (struct gl_fragment_program *)
  80       ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
  81 #endif
  82
  83 #if FEATURE_ATI_fragment_shader
  84    shared->ATIShaders = _mesa_NewHashTable();
  85    shared->DefaultFragmentShader = _mesa_new_ati_fragment_shader(ctx, 0);
  86 #endif
  87
  88 #if FEATURE_ARB_shader_objects
  89    shared->ShaderObjects = _mesa_NewHashTable();
  90 #endif
  91
  92 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
  93    shared->BufferObjects = _mesa_NewHashTable();
  94 #endif
  95
  96    /* Allocate the default buffer object */
  97    shared->NullBufferObj = ctx->Driver.NewBufferObject(ctx, 0, 0);
  98 #ifndef DEBUG
  99    /* Set refcount so high that it never gets deleted.
 100     * XXX with recent/improved refcounting this should be no longer be needed.
 101     */
 102    shared->NullBufferObj->RefCount = 1000 * 1000 * 1000;
 103 #endif
 104
 105    /* Create default texture objects */
 106    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 107       /* NOTE: the order of these enums matches the TEXTURE_x_INDEX values */
 108       static const GLenum targets[NUM_TEXTURE_TARGETS] = {
 109          GL_TEXTURE_2D_ARRAY_EXT,
 110          GL_TEXTURE_1D_ARRAY_EXT,
 111          GL_TEXTURE_CUBE_MAP,
 112          GL_TEXTURE_3D,
 113          GL_TEXTURE_RECTANGLE_NV,
 114          GL_TEXTURE_2D,
 115          GL_TEXTURE_1D
 116       };
 117       shared->DefaultTex[i] = ctx->Driver.NewTextureObject(ctx, 0, targets[i]);
 118    }
 119
 120    /* sanity check */
 121    assert(shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount == 1);
 122
 123    /* Mutex and timestamp for texobj state validation */
 124    _glthread_INIT_MUTEX(shared->TexMutex);
 125    shared->TextureStateStamp = 0;
 126
 127 #if FEATURE_EXT_framebuffer_object
 128    shared->FrameBuffers = _mesa_NewHashTable();
 129    shared->RenderBuffers = _mesa_NewHashTable();
 130 #endif
 131
 132 #if FEATURE_ARB_sync
 133    make_empty_list(& shared->SyncObjects);
 134 #endif
 135
 136    return shared;
 137 }
 138
 139
 140 /**
 141  * Callback for deleting a display list.  Called by _mesa_HashDeleteAll().
 142  */
 143 static void
 144 delete_displaylist_cb(GLuint id, void *data, void *userData)
 145 {
 146    struct gl_display_list *list = (struct gl_display_list *) data;
 147    GLcontext *ctx = (GLcontext *) userData;
 148    _mesa_delete_list(ctx, list);
 149 }
 150
 151
 152 /**
 153  * Callback for deleting a texture object.  Called by _mesa_HashDeleteAll().
 154  */
 155 static void
 156 delete_texture_cb(GLuint id, void *data, void *userData)
 157 {
 158    struct gl_texture_object *texObj = (struct gl_texture_object *) data;
 159    GLcontext *ctx = (GLcontext *) userData;
 160    ctx->Driver.DeleteTexture(ctx, texObj);
 161 }
 162
 163
 164 /**
 165  * Callback for deleting a program object.  Called by _mesa_HashDeleteAll().
 166  */
 167 static void
 168 delete_program_cb(GLuint id, void *data, void *userData)
 169 {
 170    struct gl_program *prog = (struct gl_program *) data;
 171    GLcontext *ctx = (GLcontext *) userData;
 172    if(prog != &_mesa_DummyProgram) {
 173       ASSERT(prog->RefCount == 1); /* should only be referenced by hash table */
 174       prog->RefCount = 0;  /* now going away */
 175       ctx->Driver.DeleteProgram(ctx, prog);
 176    }
 177 }
 178
 179
 180 #if FEATURE_ATI_fragment_shader
 181 /**
 182  * Callback for deleting an ATI fragment shader object.
 183  * Called by _mesa_HashDeleteAll().
 184  */
 185 static void
 186 delete_fragshader_cb(GLuint id, void *data, void *userData)
 187 {
 188    struct ati_fragment_shader *shader = (struct ati_fragment_shader *) data;
 189    GLcontext *ctx = (GLcontext *) userData;
 190    _mesa_delete_ati_fragment_shader(ctx, shader);
 191 }
 192 #endif
 193
 194
 195 /**
 196  * Callback for deleting a buffer object.  Called by _mesa_HashDeleteAll().
 197  */
 198 static void
 199 delete_bufferobj_cb(GLuint id, void *data, void *userData)
 200 {
 201    struct gl_buffer_object *bufObj = (struct gl_buffer_object *) data;
 202    GLcontext *ctx = (GLcontext *) userData;
 203    if (_mesa_bufferobj_mapped(bufObj)) {
 204       ctx->Driver.UnmapBuffer(ctx, 0, bufObj);
 205       bufObj->Pointer = NULL;
 206    }
 207    _mesa_reference_buffer_object(ctx, &bufObj, NULL);
 208 }
 209
 210
 211 /**
 212  * Callback for freeing shader program data. Call it before delete_shader_cb
 213  * to avoid memory access error.
 214  */
 215 static void
 216 free_shader_program_data_cb(GLuint id, void *data, void *userData)
 217 {
 218    GLcontext *ctx = (GLcontext *) userData;
 219    struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 220
 221    if (shProg->Type == GL_SHADER_PROGRAM_MESA) {
 222        _mesa_free_shader_program_data(ctx, shProg);
 223    }
 224 }
 225
 226
 227 /**
 228  * Callback for deleting shader and shader programs objects.
 229  * Called by _mesa_HashDeleteAll().
 230  */
 231 static void
 232 delete_shader_cb(GLuint id, void *data, void *userData)
 233 {
 234    GLcontext *ctx = (GLcontext *) userData;
 235    struct gl_shader *sh = (struct gl_shader *) data;
 236    if (sh->Type == GL_FRAGMENT_SHADER || sh->Type == GL_VERTEX_SHADER) {
 237       _mesa_free_shader(ctx, sh);
 238    }
 239    else {
 240       struct gl_shader_program *shProg = (struct gl_shader_program *) data;
 241       ASSERT(shProg->Type == GL_SHADER_PROGRAM_MESA);
 242       _mesa_free_shader_program(ctx, shProg);
 243    }
 244 }
 245
 246
 247 /**
 248  * Callback for deleting a framebuffer object.  Called by _mesa_HashDeleteAll()
 249  */
 250 static void
 251 delete_framebuffer_cb(GLuint id, void *data, void *userData)
 252 {
 253    struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
 254    /* The fact that the framebuffer is in the hashtable means its refcount
 255     * is one, but we're removing from the hashtable now.  So clear refcount.
 256     */
 257    /*assert(fb->RefCount == 1);*/
 258    fb->RefCount = 0;
 259
 260    /* NOTE: Delete should always be defined but there are two reports
 261     * of it being NULL (bugs 13507, 14293).  Work-around for now.
 262     */
 263    if (fb->Delete)
 264       fb->Delete(fb);
 265 }
 266
 267
 268 /**
 269  * Callback for deleting a renderbuffer object. Called by _mesa_HashDeleteAll()
 270  */
 271 static void
 272 delete_renderbuffer_cb(GLuint id, void *data, void *userData)
 273 {
 274    struct gl_renderbuffer *rb = (struct gl_renderbuffer *) data;
 275    rb->RefCount = 0;  /* see comment for FBOs above */
 276    if (rb->Delete)
 277       rb->Delete(rb);
 278 }
 279
 280
 281 /**
 282  * Deallocate a shared state object and all children structures.
 283  *
 284  * \param ctx GL context.
 285  * \param shared shared state pointer.
 286  *
 287  * Frees the display lists, the texture objects (calling the driver texture
 288  * deletion callback to free its private data) and the vertex programs, as well
 289  * as their hash tables.
 290  *
 291  * \sa alloc_shared_state().
 292  */
 293 static void
 294 free_shared_state(GLcontext *ctx, struct gl_shared_state *shared)
 295 {
 296    GLuint i;
 297
 298    /*
 299     * Free display lists
 300     */
 301    _mesa_HashDeleteAll(shared->DisplayList, delete_displaylist_cb, ctx);
 302    _mesa_DeleteHashTable(shared->DisplayList);
 303
 304 #if FEATURE_ARB_shader_objects
 305    _mesa_HashWalk(shared->ShaderObjects, free_shader_program_data_cb, ctx);
 306    _mesa_HashDeleteAll(shared->ShaderObjects, delete_shader_cb, ctx);
 307    _mesa_DeleteHashTable(shared->ShaderObjects);
 308 #endif
 309
 310    _mesa_HashDeleteAll(shared->Programs, delete_program_cb, ctx);
 311    _mesa_DeleteHashTable(shared->Programs);
 312
 313 #if FEATURE_ARB_vertex_program
 314    _mesa_reference_vertprog(ctx, &shared->DefaultVertexProgram, NULL);
 315 #endif
 316
 317 #if FEATURE_ARB_fragment_program
 318    _mesa_reference_fragprog(ctx, &shared->DefaultFragmentProgram, NULL);
 319 #endif
 320
 321 #if FEATURE_ATI_fragment_shader
 322    _mesa_HashDeleteAll(shared->ATIShaders, delete_fragshader_cb, ctx);
 323    _mesa_DeleteHashTable(shared->ATIShaders);
 324    _mesa_delete_ati_fragment_shader(ctx, shared->DefaultFragmentShader);
 325 #endif
 326
 327 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
 328    _mesa_HashDeleteAll(shared->BufferObjects, delete_bufferobj_cb, ctx);
 329    _mesa_DeleteHashTable(shared->BufferObjects);
 330 #endif
 331
 332 #if FEATURE_EXT_framebuffer_object
 333    _mesa_HashDeleteAll(shared->FrameBuffers, delete_framebuffer_cb, ctx);
 334    _mesa_DeleteHashTable(shared->FrameBuffers);
 335    _mesa_HashDeleteAll(shared->RenderBuffers, delete_renderbuffer_cb, ctx);
 336    _mesa_DeleteHashTable(shared->RenderBuffers);
 337 #endif
 338
 339 #if FEATURE_ARB_vertex_buffer_object
 340    _mesa_reference_buffer_object(ctx, &shared->NullBufferObj, NULL);
 341 #endif
 342
 343 #if FEATURE_ARB_sync
 344    {
 345       struct simple_node *node;
 346       struct simple_node *temp;
 347
 348       foreach_s(node, temp, & shared->SyncObjects) {
 349          _mesa_unref_sync_object(ctx, (struct gl_sync_object *) node);
 350       }
 351    }
 352 #endif
 353
 354    /*
 355     * Free texture objects (after FBOs since some textures might have
 356     * been bound to FBOs).
 357     */
 358    ASSERT(ctx->Driver.DeleteTexture);
 359    /* the default textures */
 360    for (i = 0; i < NUM_TEXTURE_TARGETS; i++) {
 361       ctx->Driver.DeleteTexture(ctx, shared->DefaultTex[i]);
 362    }
 363
 364    /* all other textures */
 365    _mesa_HashDeleteAll(shared->TexObjects, delete_texture_cb, ctx);
 366    _mesa_DeleteHashTable(shared->TexObjects);
 367
 368    _glthread_DESTROY_MUTEX(shared->Mutex);
 369    _glthread_DESTROY_MUTEX(shared->TexMutex);
 370
 371    _mesa_free(shared);
 372 }
 373
 374
 375 /**
 376  * Decrement shared state object reference count and potentially free it
 377  * and all children structures.
 378  *
 379  * \param ctx GL context.
 380  * \param shared shared state pointer.
 381  *
 382  * \sa free_shared_state().
 383  */
 384 void
 385 _mesa_release_shared_state(GLcontext *ctx, struct gl_shared_state *shared)
 386 {
 387    GLint RefCount;
 388
 389    _glthread_LOCK_MUTEX(shared->Mutex);
 390    RefCount = --shared->RefCount;
 391    _glthread_UNLOCK_MUTEX(shared->Mutex);
 392
 393    assert(RefCount >= 0);
 394
 395    if (RefCount == 0) {
 396       /* free shared state */
 397       free_shared_state( ctx, shared );
 398    }
 399 }