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 #include "glsl_types.h" 36 37 class symbol_table_entry; 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 private: 47 static int _glsl_symbol_table_destructorglsl_symbol_table48 _glsl_symbol_table_destructor (glsl_symbol_table *table) 49 { 50 table->~glsl_symbol_table(); 51 52 return 0; 53 } 54 55 public: 56 /* Callers of this hieralloc-based new need not call delete. It's 57 * easier to just hieralloc_free 'ctx' (or any of its ancestors). */ newglsl_symbol_table58 static void* operator new(size_t size, void *ctx) 59 { 60 void *table; 61 62 table = hieralloc_size(ctx, size); 63 assert(table != NULL); 64 65 hieralloc_set_destructor(table, (int (*)(void*)) _glsl_symbol_table_destructor); 66 return table; 67 } 68 69 /* If the user *does* call delete, that's OK, we will just 70 * hieralloc_free in that case. Here, C++ will have already called the 71 * destructor so tell hieralloc not to do that again. */ deleteglsl_symbol_table72 static void operator delete(void *table) 73 { 74 hieralloc_set_destructor(table, NULL); 75 hieralloc_free(table); 76 } 77 78 glsl_symbol_table(void * mem_ctx); 79 ~glsl_symbol_table(); 80 81 unsigned int language_version; 82 83 void push_scope(); 84 void pop_scope(); 85 86 /** 87 * Determine whether a name was declared at the current scope 88 */ 89 bool name_declared_this_scope(const char *name); 90 91 /** 92 * \name Methods to add symbols to the table 93 * 94 * There is some temptation to rename all these functions to \c add_symbol 95 * or similar. However, this breaks symmetry with the getter functions and 96 * reduces the clarity of the intention of code that uses these methods. 97 */ 98 /*@{*/ 99 bool add_variable(ir_variable *v); 100 bool add_type(const char *name, const glsl_type *t); 101 bool add_function(ir_function *f); 102 /*@}*/ 103 104 /** 105 * Add an function at global scope without checking for scoping conflicts. 106 */ 107 void add_global_function(ir_function *f); 108 109 /** 110 * \name Methods to get symbols from the table 111 */ 112 /*@{*/ 113 ir_variable *get_variable(const char *name); 114 const glsl_type *get_type(const char *name); 115 ir_function *get_function(const char *name); 116 /*@}*/ 117 118 private: 119 symbol_table_entry *get_entry(const char *name); 120 121 struct _mesa_symbol_table *table; 122 void *mem_ctx; 123 }; 124 125 #endif /* GLSL_SYMBOL_TABLE */ 126