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Fri Oct 28 21:19:04 2011 UTC (12 years, 5 months ago) by zoff99
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1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 */
19
20 /*
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
25 */
26
27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
28 #error "Only <glib.h> can be included directly."
29 #endif
30
31 #ifndef __G_MEM_H__
32 #define __G_MEM_H__
33
34 #include <glib/gslice.h>
35 #include <glib/gtypes.h>
36
37 G_BEGIN_DECLS
38
39 typedef struct _GMemVTable GMemVTable;
40
41
42 #if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_LONG
43 # define G_MEM_ALIGN GLIB_SIZEOF_VOID_P
44 #else /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
45 # define G_MEM_ALIGN GLIB_SIZEOF_LONG
46 #endif /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
47
48
49 /* Memory allocation functions
50 */
51 gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
52 gpointer g_malloc0 (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
53 gpointer g_realloc (gpointer mem,
54 gsize n_bytes) G_GNUC_WARN_UNUSED_RESULT;
55 void g_free (gpointer mem);
56 gpointer g_try_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
57 gpointer g_try_malloc0 (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
58 gpointer g_try_realloc (gpointer mem,
59 gsize n_bytes) G_GNUC_WARN_UNUSED_RESULT;
60
61
62 /* Convenience memory allocators
63 */
64 #define g_new(struct_type, n_structs) \
65 ((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
66 #define g_new0(struct_type, n_structs) \
67 ((struct_type *) g_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
68 #define g_renew(struct_type, mem, n_structs) \
69 ((struct_type *) g_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
70
71 #define g_try_new(struct_type, n_structs) \
72 ((struct_type *) g_try_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
73 #define g_try_new0(struct_type, n_structs) \
74 ((struct_type *) g_try_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
75 #define g_try_renew(struct_type, mem, n_structs) \
76 ((struct_type *) g_try_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
77
78
79 /* Memory allocation virtualization for debugging purposes
80 * g_mem_set_vtable() has to be the very first GLib function called
81 * if being used
82 */
83 struct _GMemVTable
84 {
85 gpointer (*malloc) (gsize n_bytes);
86 gpointer (*realloc) (gpointer mem,
87 gsize n_bytes);
88 void (*free) (gpointer mem);
89 /* optional; set to NULL if not used ! */
90 gpointer (*calloc) (gsize n_blocks,
91 gsize n_block_bytes);
92 gpointer (*try_malloc) (gsize n_bytes);
93 gpointer (*try_realloc) (gpointer mem,
94 gsize n_bytes);
95 };
96 void g_mem_set_vtable (GMemVTable *vtable);
97 gboolean g_mem_is_system_malloc (void);
98
99 GLIB_VAR gboolean g_mem_gc_friendly;
100
101 /* Memory profiler and checker, has to be enabled via g_mem_set_vtable()
102 */
103 GLIB_VAR GMemVTable *glib_mem_profiler_table;
104 void g_mem_profile (void);
105
106
107 /* deprecated memchunks and allocators */
108 #if !defined (G_DISABLE_DEPRECATED) || defined (GTK_COMPILATION) || defined (GDK_COMPILATION)
109 typedef struct _GAllocator GAllocator;
110 typedef struct _GMemChunk GMemChunk;
111 #define g_mem_chunk_create(type, pre_alloc, alloc_type) ( \
112 g_mem_chunk_new (#type " mem chunks (" #pre_alloc ")", \
113 sizeof (type), \
114 sizeof (type) * (pre_alloc), \
115 (alloc_type)) \
116 )
117 #define g_chunk_new(type, chunk) ( \
118 (type *) g_mem_chunk_alloc (chunk) \
119 )
120 #define g_chunk_new0(type, chunk) ( \
121 (type *) g_mem_chunk_alloc0 (chunk) \
122 )
123 #define g_chunk_free(mem, mem_chunk) G_STMT_START { \
124 g_mem_chunk_free ((mem_chunk), (mem)); \
125 } G_STMT_END
126 #define G_ALLOC_ONLY 1
127 #define G_ALLOC_AND_FREE 2
128 GMemChunk* g_mem_chunk_new (const gchar *name,
129 gint atom_size,
130 gsize area_size,
131 gint type);
132 void g_mem_chunk_destroy (GMemChunk *mem_chunk);
133 gpointer g_mem_chunk_alloc (GMemChunk *mem_chunk);
134 gpointer g_mem_chunk_alloc0 (GMemChunk *mem_chunk);
135 void g_mem_chunk_free (GMemChunk *mem_chunk,
136 gpointer mem);
137 void g_mem_chunk_clean (GMemChunk *mem_chunk);
138 void g_mem_chunk_reset (GMemChunk *mem_chunk);
139 void g_mem_chunk_print (GMemChunk *mem_chunk);
140 void g_mem_chunk_info (void);
141 void g_blow_chunks (void);
142 GAllocator*g_allocator_new (const gchar *name,
143 guint n_preallocs);
144 void g_allocator_free (GAllocator *allocator);
145 #define G_ALLOCATOR_LIST (1)
146 #define G_ALLOCATOR_SLIST (2)
147 #define G_ALLOCATOR_NODE (3)
148 #endif /* G_DISABLE_DEPRECATED */
149
150 G_END_DECLS
151
152 #endif /* __G_MEM_H__ */

   
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