home *** CD-ROM | disk | FTP | other *** search
- /* GLIB - Library of useful routines for C programming
- * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- /*
- * Modified by the GLib Team and others 1997-2000. See the AUTHORS
- * file for a list of people on the GLib Team. See the ChangeLog
- * files for a list of changes. These files are distributed with
- * GLib at ftp://ftp.gtk.org/pub/gtk/.
- */
-
- #ifndef __G_MEM_H__
- #define __G_MEM_H__
-
- #include <glib/gtypes.h>
-
- G_BEGIN_DECLS
-
- typedef struct _GAllocator GAllocator;
- typedef struct _GMemChunk GMemChunk;
- typedef struct _GMemVTable GMemVTable;
-
-
- #if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_LONG
- # define G_MEM_ALIGN GLIB_SIZEOF_VOID_P
- #else /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
- # define G_MEM_ALIGN GLIB_SIZEOF_LONG
- #endif /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
-
-
- /* Memory allocation functions
- */
- gpointer g_malloc (gulong n_bytes) G_GNUC_MALLOC;
- gpointer g_malloc0 (gulong n_bytes) G_GNUC_MALLOC;
- gpointer g_realloc (gpointer mem,
- gulong n_bytes);
- void g_free (gpointer mem);
- gpointer g_try_malloc (gulong n_bytes) G_GNUC_MALLOC;
- gpointer g_try_malloc0 (gulong n_bytes) G_GNUC_MALLOC;
- gpointer g_try_realloc (gpointer mem,
- gulong n_bytes);
-
-
- /* Convenience memory allocators
- */
- #define g_new(struct_type, n_structs) \
- ((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
- #define g_new0(struct_type, n_structs) \
- ((struct_type *) g_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
- #define g_renew(struct_type, mem, n_structs) \
- ((struct_type *) g_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
-
- #define g_try_new(struct_type, n_structs) \
- ((struct_type *) g_try_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
- #define g_try_new0(struct_type, n_structs) \
- ((struct_type *) g_try_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
- #define g_try_renew(struct_type, mem, n_structs) \
- ((struct_type *) g_try_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
-
-
- /* Memory allocation virtualization for debugging purposes
- * g_mem_set_vtable() has to be the very first GLib function called
- * if being used
- */
- struct _GMemVTable
- {
- gpointer (*malloc) (gsize n_bytes);
- gpointer (*realloc) (gpointer mem,
- gsize n_bytes);
- void (*free) (gpointer mem);
- /* optional; set to NULL if not used ! */
- gpointer (*calloc) (gsize n_blocks,
- gsize n_block_bytes);
- gpointer (*try_malloc) (gsize n_bytes);
- gpointer (*try_realloc) (gpointer mem,
- gsize n_bytes);
- };
- void g_mem_set_vtable (GMemVTable *vtable);
- gboolean g_mem_is_system_malloc (void);
-
- /* Memory profiler and checker, has to be enabled via g_mem_set_vtable()
- */
- GLIB_VAR GMemVTable *glib_mem_profiler_table;
- void g_mem_profile (void);
-
-
- /* Memchunk convenience functions
- */
- #define g_mem_chunk_create(type, pre_alloc, alloc_type) ( \
- g_mem_chunk_new (#type " mem chunks (" #pre_alloc ")", \
- sizeof (type), \
- sizeof (type) * (pre_alloc), \
- (alloc_type)) \
- )
- #define g_chunk_new(type, chunk) ( \
- (type *) g_mem_chunk_alloc (chunk) \
- )
- #define g_chunk_new0(type, chunk) ( \
- (type *) g_mem_chunk_alloc0 (chunk) \
- )
- #define g_chunk_free(mem, mem_chunk) G_STMT_START { \
- g_mem_chunk_free ((mem_chunk), (mem)); \
- } G_STMT_END
-
-
- /* "g_mem_chunk_new" creates a new memory chunk.
- * Memory chunks are used to allocate pieces of memory which are
- * always the same size. Lists are a good example of such a data type.
- * The memory chunk allocates and frees blocks of memory as needed.
- * Just be sure to call "g_mem_chunk_free" and not "g_free" on data
- * allocated in a mem chunk. ("g_free" will most likely cause a seg
- * fault...somewhere).
- *
- * Oh yeah, GMemChunk is an opaque data type. (You don't really
- * want to know what's going on inside do you?)
- */
-
- /* ALLOC_ONLY MemChunks can only allocate memory. The free operation
- * is interpreted as a no op. ALLOC_ONLY MemChunks save 4 bytes per
- * atom. (They are also useful for lists which use MemChunk to allocate
- * memory but are also part of the MemChunk implementation).
- * ALLOC_AND_FREE MemChunks can allocate and free memory.
- */
-
- #define G_ALLOC_ONLY 1
- #define G_ALLOC_AND_FREE 2
-
- GMemChunk* g_mem_chunk_new (const gchar *name,
- gint atom_size,
- gulong area_size,
- gint type);
- void g_mem_chunk_destroy (GMemChunk *mem_chunk);
- gpointer g_mem_chunk_alloc (GMemChunk *mem_chunk);
- gpointer g_mem_chunk_alloc0 (GMemChunk *mem_chunk);
- void g_mem_chunk_free (GMemChunk *mem_chunk,
- gpointer mem);
- void g_mem_chunk_clean (GMemChunk *mem_chunk);
- void g_mem_chunk_reset (GMemChunk *mem_chunk);
- void g_mem_chunk_print (GMemChunk *mem_chunk);
- void g_mem_chunk_info (void);
-
- /* Ah yes...we have a "g_blow_chunks" function.
- * "g_blow_chunks" simply compresses all the chunks. This operation
- * consists of freeing every memory area that should be freed (but
- * which we haven't gotten around to doing yet). And, no,
- * "g_blow_chunks" doesn't follow the naming scheme, but it is a
- * much better name than "g_mem_chunk_clean_all" or something
- * similar.
- */
- void g_blow_chunks (void);
-
-
- /* Generic allocators
- */
- GAllocator* g_allocator_new (const gchar *name,
- guint n_preallocs);
- void g_allocator_free (GAllocator *allocator);
-
- /* internal */
- #define G_ALLOCATOR_LIST (1)
- #define G_ALLOCATOR_SLIST (2)
- #define G_ALLOCATOR_NODE (3)
-
-
- G_END_DECLS
-
- #endif /* __G_MEM_H__ */
-