glib/gmem.h

   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 #ifndef __G_MEM_H__
  28 #define __G_MEM_H__
  29
  30 #include <glib/gslice.h>
  31 #include <glib/gtypes.h>
  32
  33 G_BEGIN_DECLS
  34
  35 typedef struct _GMemVTable GMemVTable;
  36
  37
  38 #if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_LONG
  39 #  define G_MEM_ALIGN   GLIB_SIZEOF_VOID_P
  40 #else   /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
  41 #  define G_MEM_ALIGN   GLIB_SIZEOF_LONG
  42 #endif  /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
  43
  44
  45 /* Memory allocation functions
  46  */
  47 gpointer g_malloc         (gulong        n_bytes) G_GNUC_MALLOC;
  48 gpointer g_malloc0        (gulong        n_bytes) G_GNUC_MALLOC;
  49 gpointer g_realloc        (gpointer      mem,
  50                            gulong        n_bytes) G_GNUC_WARN_UNUSED_RESULT;
  51 void     g_free           (gpointer      mem);
  52 gpointer g_try_malloc     (gulong        n_bytes) G_GNUC_MALLOC;
  53 gpointer g_try_malloc0    (gulong        n_bytes) G_GNUC_MALLOC;
  54 gpointer g_try_realloc    (gpointer      mem,
  55                            gulong        n_bytes) G_GNUC_WARN_UNUSED_RESULT;
  56
  57
  58 /* Convenience memory allocators
  59  */
  60 #define g_new(struct_type, n_structs)           \
  61     ((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  62 #define g_new0(struct_type, n_structs)          \
  63     ((struct_type *) g_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  64 #define g_renew(struct_type, mem, n_structs)    \
  65     ((struct_type *) g_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  66
  67 #define g_try_new(struct_type, n_structs)               \
  68     ((struct_type *) g_try_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  69 #define g_try_new0(struct_type, n_structs)              \
  70     ((struct_type *) g_try_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  71 #define g_try_renew(struct_type, mem, n_structs)        \
  72     ((struct_type *) g_try_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
  73
  74
  75 /* Memory allocation virtualization for debugging purposes
  76  * g_mem_set_vtable() has to be the very first GLib function called
  77  * if being used
  78  */
  79 struct _GMemVTable
  80 {
  81   gpointer (*malloc)      (gsize    n_bytes);
  82   gpointer (*realloc)     (gpointer mem,
  83                            gsize    n_bytes);
  84   void     (*free)        (gpointer mem);
  85   /* optional; set to NULL if not used ! */
  86   gpointer (*calloc)      (gsize    n_blocks,
  87                            gsize    n_block_bytes);
  88   gpointer (*try_malloc)  (gsize    n_bytes);
  89   gpointer (*try_realloc) (gpointer mem,
  90                            gsize    n_bytes);
  91 };
  92 void     g_mem_set_vtable (GMemVTable   *vtable);
  93 gboolean g_mem_is_system_malloc (void);
  94
  95 GLIB_VAR gboolean g_mem_gc_friendly;
  96
  97 /* Memory profiler and checker, has to be enabled via g_mem_set_vtable()
  98  */
  99 GLIB_VAR GMemVTable     *glib_mem_profiler_table;
 100 void    g_mem_profile   (void);
 101
 102
 103 /* deprecated memchunks and allocators */
 104 #if !defined (G_DISABLE_DEPRECATED) || defined (GTK_COMPILATION) || defined (GDK_COMPILATION)
 105 typedef struct _GAllocator GAllocator;
 106 typedef struct _GMemChunk  GMemChunk;
 107 #define g_mem_chunk_create(type, pre_alloc, alloc_type) ( \
 108   g_mem_chunk_new (#type " mem chunks (" #pre_alloc ")", \
 109                    sizeof (type), \
 110                    sizeof (type) * (pre_alloc), \
 111                    (alloc_type)) \
 112 )
 113 #define g_chunk_new(type, chunk)        ( \
 114   (type *) g_mem_chunk_alloc (chunk) \
 115 )
 116 #define g_chunk_new0(type, chunk)       ( \
 117   (type *) g_mem_chunk_alloc0 (chunk) \
 118 )
 119 #define g_chunk_free(mem, mem_chunk)    G_STMT_START { \
 120   g_mem_chunk_free ((mem_chunk), (mem)); \
 121 } G_STMT_END
 122 #define G_ALLOC_ONLY      1
 123 #define G_ALLOC_AND_FREE  2
 124 GMemChunk* g_mem_chunk_new     (const gchar *name,
 125                                 gint         atom_size,
 126                                 gulong       area_size,
 127                                 gint         type);
 128 void       g_mem_chunk_destroy (GMemChunk   *mem_chunk);
 129 gpointer   g_mem_chunk_alloc   (GMemChunk   *mem_chunk);
 130 gpointer   g_mem_chunk_alloc0  (GMemChunk   *mem_chunk);
 131 void       g_mem_chunk_free    (GMemChunk   *mem_chunk,
 132                                 gpointer     mem);
 133 void       g_mem_chunk_clean   (GMemChunk   *mem_chunk);
 134 void       g_mem_chunk_reset   (GMemChunk   *mem_chunk);
 135 void       g_mem_chunk_print   (GMemChunk   *mem_chunk);
 136 void       g_mem_chunk_info    (void);
 137 void       g_blow_chunks       (void);
 138 GAllocator*g_allocator_new     (const gchar  *name,
 139                                 guint         n_preallocs);
 140 void       g_allocator_free    (GAllocator   *allocator);
 141 #define G_ALLOCATOR_LIST       (1)
 142 #define G_ALLOCATOR_SLIST      (2)
 143 #define G_ALLOCATOR_NODE       (3)
 144 #endif /* G_DISABLE_DEPRECATED */
 145
 146 G_END_DECLS
 147
 148 #endif /* __G_MEM_H__ */