2
// Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
3
// Use of this source code is governed by a BSD-style license that can be
4
// found in the LICENSE file.
7
#ifndef _COMMON_INCLUDED_
8
#define _COMMON_INCLUDED_
15
#include "compiler/PoolAlloc.h"
17
// We need two pieces of information to report errors/warnings - string and
18
// line number. We encode these into a single int so that it can be easily
19
// incremented/decremented by lexer. The right SOURCE_LOC_LINE_SIZE bits store
20
// line number while the rest store the string number. Since the shaders are
21
// usually small, we should not run out of memory. SOURCE_LOC_LINE_SIZE
22
// can be increased to alleviate this issue.
23
typedef int TSourceLoc;
24
const unsigned int SOURCE_LOC_LINE_SIZE = 16; // in bits.
25
const unsigned int SOURCE_LOC_LINE_MASK = (1 << SOURCE_LOC_LINE_SIZE) - 1;
27
inline TSourceLoc EncodeSourceLoc(int string, int line) {
28
return (string << SOURCE_LOC_LINE_SIZE) | (line & SOURCE_LOC_LINE_MASK);
31
inline void DecodeSourceLoc(TSourceLoc loc, int* string, int* line) {
32
if (string) *string = loc >> SOURCE_LOC_LINE_SIZE;
33
if (line) *line = loc & SOURCE_LOC_LINE_MASK;
37
// Put POOL_ALLOCATOR_NEW_DELETE in base classes to make them use this scheme.
39
#define POOL_ALLOCATOR_NEW_DELETE(A) \
40
void* operator new(size_t s) { return (A).allocate(s); } \
41
void* operator new(size_t, void *_Where) { return (_Where); } \
42
void operator delete(void*) { } \
43
void operator delete(void *, void *) { } \
44
void* operator new[](size_t s) { return (A).allocate(s); } \
45
void* operator new[](size_t, void *_Where) { return (_Where); } \
46
void operator delete[](void*) { } \
47
void operator delete[](void *, void *) { }
50
// Pool version of string.
52
typedef pool_allocator<char> TStringAllocator;
53
typedef std::basic_string <char, std::char_traits<char>, TStringAllocator> TString;
54
typedef std::basic_ostringstream<char, std::char_traits<char>, TStringAllocator> TStringStream;
55
inline TString* NewPoolTString(const char* s)
57
void* memory = GlobalPoolAllocator.allocate(sizeof(TString));
58
return new(memory) TString(s);
62
// Persistent string memory. Should only be used for strings that survive
65
#define TPersistString std::string
66
#define TPersistStringStream std::ostringstream
69
// Pool allocator versions of vectors, lists, and maps
71
template <class T> class TVector : public std::vector<T, pool_allocator<T> > {
73
typedef typename std::vector<T, pool_allocator<T> >::size_type size_type;
74
TVector() : std::vector<T, pool_allocator<T> >() {}
75
TVector(const pool_allocator<T>& a) : std::vector<T, pool_allocator<T> >(a) {}
76
TVector(size_type i): std::vector<T, pool_allocator<T> >(i) {}
79
template <class K, class D, class CMP = std::less<K> >
80
class TMap : public std::map<K, D, CMP, pool_allocator<std::pair<const K, D> > > {
82
typedef pool_allocator<std::pair<const K, D> > tAllocator;
84
TMap() : std::map<K, D, CMP, tAllocator>() {}
85
// use correct two-stage name lookup supported in gcc 3.4 and above
86
TMap(const tAllocator& a) : std::map<K, D, CMP, tAllocator>(std::map<K, D, CMP, tAllocator>::key_compare(), a) {}
89
#endif // _COMMON_INCLUDED_