1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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.
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.
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.
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/.
27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
28 #error "Only <glib.h> can be included directly."
34 #include <glib/gslice.h>
35 #include <glib/gtypes.h>
39 typedef struct _GMemVTable GMemVTable;
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 */
49 /* Memory allocation functions
52 void g_free (gpointer mem);
54 gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
55 gpointer g_malloc0 (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
56 gpointer g_realloc (gpointer mem,
57 gsize n_bytes) G_GNUC_WARN_UNUSED_RESULT;
58 gpointer g_try_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
59 gpointer g_try_malloc0 (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
60 gpointer g_try_realloc (gpointer mem,
61 gsize n_bytes) G_GNUC_WARN_UNUSED_RESULT;
63 gpointer g_malloc_n (gsize n_blocks,
64 gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1,2);
65 gpointer g_malloc0_n (gsize n_blocks,
66 gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1,2);
67 gpointer g_realloc_n (gpointer mem,
69 gsize n_block_bytes) G_GNUC_WARN_UNUSED_RESULT;
70 gpointer g_try_malloc_n (gsize n_blocks,
71 gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1,2);
72 gpointer g_try_malloc0_n (gsize n_blocks,
73 gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1,2);
74 gpointer g_try_realloc_n (gpointer mem,
76 gsize n_block_bytes) G_GNUC_WARN_UNUSED_RESULT;
79 /* avoid the overflow check if we can determine at compile-time that no
80 * overflow happens. */
81 #if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__)
82 # define _G_MALLOC_N(n_blocks, n_block_bytes, func_1, func_n) \
84 gsize __a = (gsize) (n_blocks); \
85 gsize __b = (gsize) (n_block_bytes); \
87 if (__builtin_constant_p (__a) && __a == 1) \
89 else if (__builtin_constant_p (__b) && __b == 1) \
91 else if (__builtin_constant_p (__a) && \
92 __builtin_constant_p (__b) && \
93 __a <= G_MAXSIZE / __b) \
94 __p = func_1 (__a * __b); \
96 __p = func_n (__a, __b); \
99 # define _G_REALLOC_N(mem, n_blocks, n_block_bytes, func_1, func_n) \
101 gsize __a = (gsize) (n_blocks); \
102 gsize __b = (gsize) (n_block_bytes); \
103 gpointer __p = (gpointer) (mem); \
104 if (__builtin_constant_p (__a) && __a == 1) \
105 __p = func_1 (__p, __b); \
106 else if (__builtin_constant_p (__b) && __b == 1) \
107 __p = func_1 (__p, __a); \
108 else if (__builtin_constant_p (__a) && \
109 __builtin_constant_p (__b) && \
110 __a <= G_MAXSIZE / __b) \
111 __p = func_1 (__p, __a * __b); \
113 __p = func_n (__p, __a, __b); \
117 # define g_malloc_n(n_blocks,n_block_bytes) _G_MALLOC_N (n_blocks, n_block_bytes, g_malloc, g_malloc_n)
118 # define g_malloc0_n(n_blocks,n_block_bytes) _G_MALLOC_N (n_blocks, n_block_bytes, g_malloc0, g_malloc0_n)
119 # define g_realloc_n(mem,n_blocks,n_block_bytes) _G_REALLOC_N (mem, n_blocks, n_block_bytes, g_realloc, g_realloc_n)
120 # define g_try_malloc_n(n_blocks,n_block_bytes) _G_MALLOC_N (n_blocks, n_block_bytes, g_try_malloc, g_try_malloc_n)
121 # define g_try_malloc0_n(n_blocks,n_block_bytes) _G_MALLOC_N (n_blocks, n_block_bytes, g_try_malloc0, g_try_malloc0_n)
122 # define g_try_realloc_n(mem,n_blocks,n_block_bytes) _G_REALLOC_N (mem, n_blocks, n_block_bytes, g_try_realloc, g_try_realloc_n)
126 /* Convenience memory allocators
129 #define _G_NEW(struct_type, n_structs, _g_malloc_n) \
130 ((struct_type *) _g_malloc_n ((n_structs), sizeof (struct_type)))
131 #define _G_RENEW(struct_type, mem, n_structs, _g_realloc_n) \
132 ((struct_type *) _g_realloc_n ((mem), (n_structs), sizeof (struct_type)))
134 #define g_new(struct_type, n_structs) _G_NEW (struct_type, n_structs, g_malloc_n)
135 #define g_new0(struct_type, n_structs) _G_NEW (struct_type, n_structs, g_malloc0_n)
136 #define g_renew(struct_type, mem, n_structs) _G_RENEW (struct_type, mem, n_structs, g_realloc_n)
137 #define g_try_new(struct_type, n_structs) _G_NEW (struct_type, n_structs, g_try_malloc_n)
138 #define g_try_new0(struct_type, n_structs) _G_NEW (struct_type, n_structs, g_try_malloc0_n)
139 #define g_try_renew(struct_type, mem, n_structs) _G_RENEW (struct_type, mem, n_structs, g_try_realloc_n)
142 /* Memory allocation virtualization for debugging purposes
143 * g_mem_set_vtable() has to be the very first GLib function called
147 gpointer (*malloc) (gsize n_bytes);
148 gpointer (*realloc) (gpointer mem,
150 void (*free) (gpointer mem);
151 /* optional; set to NULL if not used ! */
152 gpointer (*calloc) (gsize n_blocks,
153 gsize n_block_bytes);
154 gpointer (*try_malloc) (gsize n_bytes);
155 gpointer (*try_realloc) (gpointer mem,
158 void g_mem_set_vtable (GMemVTable *vtable);
159 gboolean g_mem_is_system_malloc (void);
161 GLIB_VAR gboolean g_mem_gc_friendly;
163 /* Memory profiler and checker, has to be enabled via g_mem_set_vtable()
165 GLIB_VAR GMemVTable *glib_mem_profiler_table;
166 void g_mem_profile (void);
169 /* deprecated memchunks and allocators */
170 #if !defined (G_DISABLE_DEPRECATED) || defined (GTK_COMPILATION) || defined (GDK_COMPILATION)
171 typedef struct _GAllocator GAllocator;
172 typedef struct _GMemChunk GMemChunk;
173 #define g_mem_chunk_create(type, pre_alloc, alloc_type) ( \
174 g_mem_chunk_new (#type " mem chunks (" #pre_alloc ")", \
176 sizeof (type) * (pre_alloc), \
179 #define g_chunk_new(type, chunk) ( \
180 (type *) g_mem_chunk_alloc (chunk) \
182 #define g_chunk_new0(type, chunk) ( \
183 (type *) g_mem_chunk_alloc0 (chunk) \
185 #define g_chunk_free(mem, mem_chunk) G_STMT_START { \
186 g_mem_chunk_free ((mem_chunk), (mem)); \
188 #define G_ALLOC_ONLY 1
189 #define G_ALLOC_AND_FREE 2
190 GMemChunk* g_mem_chunk_new (const gchar *name,
194 void g_mem_chunk_destroy (GMemChunk *mem_chunk);
195 gpointer g_mem_chunk_alloc (GMemChunk *mem_chunk);
196 gpointer g_mem_chunk_alloc0 (GMemChunk *mem_chunk);
197 void g_mem_chunk_free (GMemChunk *mem_chunk,
199 void g_mem_chunk_clean (GMemChunk *mem_chunk);
200 void g_mem_chunk_reset (GMemChunk *mem_chunk);
201 void g_mem_chunk_print (GMemChunk *mem_chunk);
202 void g_mem_chunk_info (void);
203 void g_blow_chunks (void);
204 GAllocator*g_allocator_new (const gchar *name,
206 void g_allocator_free (GAllocator *allocator);
207 #define G_ALLOCATOR_LIST (1)
208 #define G_ALLOCATOR_SLIST (2)
209 #define G_ALLOCATOR_NODE (3)
210 #endif /* G_DISABLE_DEPRECATED */
214 #endif /* __G_MEM_H__ */