src/compiler/glsl/glsl_symbol_table.h

   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright © 2010 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #pragma once
  26 #ifndef GLSL_SYMBOL_TABLE
  27 #define GLSL_SYMBOL_TABLE
  28
  29 #include <new>
  30
  31 extern "C" {
  32 #include "program/symbol_table.h"
  33 }
  34 #include "ir.h"
  35
  36 class symbol_table_entry;
  37 struct glsl_type;
  38
  39 /**
  40  * Facade class for _mesa_symbol_table
  41  *
  42  * Wraps the existing \c _mesa_symbol_table data structure to enforce some
  43  * type safe and some symbol table invariants.
  44  */
  45 struct glsl_symbol_table {
  46    DECLARE_RALLOC_CXX_OPERATORS(glsl_symbol_table)
  47
  48    glsl_symbol_table();
  49    ~glsl_symbol_table();
  50
  51    /* In 1.10, functions and variables have separate namespaces. */
  52    bool separate_function_namespace;
  53
  54    void push_scope();
  55    void pop_scope();
  56
  57    /**
  58     * Determine whether a name was declared at the current scope
  59     */
  60    bool name_declared_this_scope(const char *name);
  61
  62    /**
  63     * \name Methods to add symbols to the table
  64     *
  65     * There is some temptation to rename all these functions to \c add_symbol
  66     * or similar.  However, this breaks symmetry with the getter functions and
  67     * reduces the clarity of the intention of code that uses these methods.
  68     */
  69    /*@{*/
  70    bool add_variable(ir_variable *v);
  71    bool add_type(const char *name, const glsl_type *t);
  72    bool add_function(ir_function *f);
  73    bool add_interface(const char *name, const glsl_type *i,
  74                       enum ir_variable_mode mode);
  75    bool add_default_precision_qualifier(const char *type_name, int precision);
  76    /*@}*/
  77
  78    /**
  79     * Add an function at global scope without checking for scoping conflicts.
  80     */
  81    void add_global_function(ir_function *f);
  82
  83    /**
  84     * \name Methods to get symbols from the table
  85     */
  86    /*@{*/
  87    ir_variable *get_variable(const char *name);
  88    const glsl_type *get_type(const char *name);
  89    ir_function *get_function(const char *name);
  90    const glsl_type *get_interface(const char *name,
  91                                   enum ir_variable_mode mode);
  92    int get_default_precision_qualifier(const char *type_name);
  93    /*@}*/
  94
  95    /**
  96     * Disable a previously-added variable so that it no longer appears to be
  97     * in the symbol table.  This is necessary when gl_PerVertex is redeclared,
  98     * to ensure that previously-available built-in variables are no longer
  99     * available.
 100     */
 101    void disable_variable(const char *name);
 102
 103 private:
 104    symbol_table_entry *get_entry(const char *name);
 105
 106    struct _mesa_symbol_table *table;
 107    void *mem_ctx;
 108 };
 109
 110 #endif /* GLSL_SYMBOL_TABLE */