Annotation of parser3/src/include/pa_memory.h, revision 1.8
1.2 paf 1: /** @file
2: Parser: memory reference counting classes decls.
3:
4: Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
5:
6: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
7: */
8:
9: #ifndef PA_MEMORY_H
10: #define PA_MEMORY_H
11:
1.8 ! paf 12: static const char * const IDENT_MEMORY_H="$Date: 2003/11/06 09:56:17 $";
1.2 paf 13:
14: // include
15:
16: #include "pa_config_includes.h"
17:
1.5 paf 18: /// to debug backtrace pointers switch this on:
1.7 paf 19: #ifdef _DEBUG
20: #define GC_DEBUG
21: #endif
1.2 paf 22: #include "gc.h"
23:
24: // defines
25:
26: //#define PA_DEBUG_GC_MEMORY
27:
28: #ifdef PA_DEBUG_GC_MEMORY
29: void* pa_gc_malloc(size_t size);
30: void* pa_gc_malloc_atomic(size_t size);
31: void* pa_gc_realloc(void* ptr, size_t size);
32: void pa_gc_free(void* ptr);
33: #else
34: inline void* pa_gc_malloc(size_t size) { return GC_MALLOC(size); }
35: inline void* pa_gc_malloc_atomic(size_t size) { return GC_MALLOC_ATOMIC(size); }
36: inline void* pa_gc_realloc(void* ptr, size_t size) { return GC_REALLOC(ptr, size); }
37: inline void pa_gc_free(void* ptr) { GC_FREE(ptr); }
38: #endif
39:
40:
41: // forwards
42:
43: void *pa_fail_alloc(const char* what, size_t size);
44:
45: // inlines
46:
47: inline void *pa_malloc(size_t size) {
1.4 paf 48: if(void *result=pa_gc_malloc(size))
1.2 paf 49: return result;
50:
51: return pa_fail_alloc("allocate", size);
52: }
53:
54: inline void *pa_malloc_atomic(size_t size) {
1.4 paf 55: if(void *result=pa_gc_malloc_atomic(size))
1.2 paf 56: return result;
57:
58: return pa_fail_alloc("allocate clean", size);
59: }
60: /// @a length may be null, which mean "autocalc it"
61: inline char *pa_strdup(const char* auto_variable_never_null, size_t helper_length=0) {
62: size_t known_length=(helper_length?helper_length:strlen(auto_variable_never_null));
63:
64: size_t size=known_length+1;
1.4 paf 65: if(char *result=static_cast<char*>(pa_gc_malloc_atomic(size))) {
1.2 paf 66: memcpy(result, auto_variable_never_null, size);
67: result[known_length]=0;
68: return result;
69: }
70:
71: return static_cast<char*>(pa_fail_alloc("allocate clean", size));
72: }
73:
74: inline void pa_free(void *ptr) {
1.4 paf 75: pa_gc_free(ptr);
1.2 paf 76: }
77:
78: inline void *pa_realloc(void *ptr, size_t size) {
1.4 paf 79: if(void *result=pa_gc_realloc(ptr, size))
1.2 paf 80: return result;
81:
82: return pa_fail_alloc("reallocate to", size);
83: }
84:
85: //{@ these operators are disabled, one should explicitely specify either new(UseGC) or new(PointerFreeGC)
1.3 paf 86: inline void *operator new(size_t) { abort(); } // disabled
87: inline void *operator new[] (size_t) { abort(); } // disabled
1.2 paf 88: //}@
89:
90: #define UseGC ((int)1)
91: #define PointerFreeGC (true)
92:
93: //{@ Array-oriented
1.3 paf 94: inline void *operator new[] (size_t size, int) { // UseGC
1.2 paf 95: return pa_malloc(size);
96: }
97: inline void *operator new[] (size_t size, bool) { // PointerFreeGC
98: return pa_malloc_atomic(size);
99: }
100: inline void operator delete[] (void *ptr) {
101: pa_free(ptr);
102: }
103: //}@
104:
105: //{@ Structure-oriented
106: inline void *operator new (size_t size, int) { // UseGC
107: return pa_malloc(size);
108: }
109: inline void *operator new (size_t size, bool) { // PointerFreeGC
110: return pa_malloc_atomic(size);
111: }
112: inline void operator delete(void *ptr) {
113: pa_free(ptr);
114: }
115: //}@
116:
117: /// memory allocation/dallocation goes via pa_malloc/pa_free.
118: class PA_Allocated {
119: public:
120: /// the sole: instances allocated using our functions
121: static void *operator new(size_t size) {
122: return pa_malloc(size);
123: }
124: static void operator delete(void *ptr) {
125: pa_free(ptr);
126: }
127: static void *malloc(size_t size) {
128: return pa_malloc(size);
129: }
130: static void *malloc_atomic(size_t size) {
131: return pa_malloc_atomic(size);
132: }
133: static char *strdup(const char* auto_variable_never_null, size_t helper_length=0) {
134: return pa_strdup(auto_variable_never_null, helper_length);
135: }
136: static void free(void *ptr) {
137: pa_free(ptr);
138: }
139: static void *realloc(void *ptr, size_t size) {
140: return pa_realloc(ptr, size);
141: }
142:
143: private: // disabled from accidental use
144:
145: /// use malloc/malloc_atomic instead [GC clears result of those]
146: static void *calloc(size_t size);
147:
148: };
149:
150: /// Those who want their destructor called during finalization, must derive from this class [also]
151: class PA_Cleaned {
152: #ifndef PA_DEBUG_DISABLE_GC
153: static void cleanup( void* obj, void* displ ) {
154: ((PA_Cleaned*) ((char*) obj + (ptrdiff_t) displ))->~PA_Cleaned();
155: }
156:
157: public:
158: PA_Cleaned() {
159: GC_finalization_proc oldProc;
160: void* oldData;
161: void* base = GC_base( (void *) this );
162: if (0 != base) {
163: // Don't call the debug version, since this is a real base address.
164: GC_register_finalizer_ignore_self(
165: base, (GC_finalization_proc)cleanup, (void*) ((char*) this - (char*) base),
166: &oldProc, &oldData );
167: if (0 != oldProc) {
168: GC_register_finalizer_ignore_self( base, oldProc, oldData, 0, 0 );
169: }
170: }
171: }
172:
173: virtual ~PA_Cleaned() {
174: GC_REGISTER_FINALIZER_IGNORE_SELF( GC_base(this), 0, 0, 0, 0 );
175: }
176: #endif
177: };
178:
179: /// Base for all Parser classes
180: typedef PA_Allocated PA_Object;
181:
182: // defines
183:
184: #define override
185: #define rethrow throw
186:
187:
188: #endif
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