mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-11-10 11:26:16 +01:00
782a8e2e7c
Thu Dec 28 10:21:46 2000 Tim Janik <timj@gtk.org>
* gmem.[hc]: got rid of outdated dmalloc support. provide g_try_malloc()
and g_try_realloc() which _may_ fail and return NULL.
nuked g_mem_check(), provided GMemVTable for memory function
virtualization, alterable at program startup with g_mem_set_vtable().
provided glib_mem_profiler_table and g_mem_profile() to support limited
profiling information out of the box (uses mprotect() for free()ed areas
on linux).
provide globally visible G_MEM_ALIGN.
buncha cleanups.
* docs/macros.txt: file to get a clue about the various configuration
macros.
* docs/debugging.txt: explain debugging traps.
* configure.in: got rid of --enable-mem-check and --enable-mem-profile,
define GLIB_SIZEOF_VOID_P and GLIB_SIZEOF_LONG. check malloc prototypes
and define SANE_MALLOC_PROTOS is we can use them.
<boy, is this file a mess>
* gutils.c, gscanner.c: fix up compatibility warnings, use g_message().
Thu Dec 28 11:36:44 2000 Tim Janik <timj@gtk.org>
* gbsearcharray.c (upper_power2): disable G_BSEARCH_ALIGN_POWER2
fucntionality if DISABLE_MEM_POOLS is defined.
* gtype.c: honour DISABLE_MEM_POOLS.
* gsignal.c (g_signal_init): flag signal key bsearch array with
G_BSEARCH_ALIGN_POWER2 to avoid excessive growth time. honour
DISABLE_MEM_POOLS.
* gparam.h: added G_PARAM_READWRITE alias for (G_PARAM_READABLE |
G_PARAM_WRITABLE).
175 lines
5.6 KiB
C
175 lines
5.6 KiB
C
/* GLIB - Library of useful routines for C programming
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GLib Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GLib Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GLib at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#ifndef __G_MEM_H__
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#define __G_MEM_H__
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#include <gtypes.h>
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G_BEGIN_DECLS
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typedef struct _GAllocator GAllocator;
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typedef struct _GMemChunk GMemChunk;
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typedef struct _GMemVTable GMemVTable;
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#if GLIB_SIZEOF_VOID_P > GLIB_SIZEOF_LONG
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# define G_MEM_ALIGN GLIB_SIZEOF_VOID_P
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#else /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
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# define G_MEM_ALIGN GLIB_SIZEOF_LONG
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#endif /* GLIB_SIZEOF_VOID_P <= GLIB_SIZEOF_LONG */
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/* Memory allocation functions
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*/
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gpointer g_malloc (gulong n_bytes);
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gpointer g_malloc0 (gulong n_bytes);
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gpointer g_realloc (gpointer mem,
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gulong n_bytes);
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void g_free (gpointer mem);
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gpointer g_try_malloc (gulong n_bytes);
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gpointer g_try_realloc (gpointer mem,
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gulong n_bytes);
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/* Convenience memory allocators
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*/
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#define g_new(struct_type, n_structs) \
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((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
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#define g_new0(struct_type, n_structs) \
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((struct_type *) g_malloc0 (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
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#define g_renew(struct_type, mem, n_structs) \
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((struct_type *) g_realloc ((mem), ((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
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/* Memory allocation virtualization for debugging purposes
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* g_mem_set_vtable() has to be the very first GLib function called
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* if being used
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*/
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struct _GMemVTable
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{
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gpointer (*malloc) (gsize n_bytes);
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gpointer (*realloc) (gpointer mem,
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gsize n_bytes);
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void (*free) (gpointer mem);
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/* optional */
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gpointer (*calloc) (gsize n_blocks,
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gsize n_block_bytes);
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gpointer (*try_malloc) (gsize n_bytes);
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gpointer (*try_realloc) (gpointer mem,
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gsize n_bytes);
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};
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void g_mem_set_vtable (GMemVTable *vtable);
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/* Memory profiler and checker, has to be enabled via g_mem_set_vtable()
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*/
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extern GMemVTable *glib_mem_profiler_table;
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void g_mem_profile (void);
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/* Memchunk convenience functions
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*/
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#define g_mem_chunk_create(type, pre_alloc, alloc_type) ( \
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g_mem_chunk_new (#type " mem chunks (" #pre_alloc ")", \
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sizeof (type), \
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sizeof (type) * (pre_alloc), \
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(alloc_type)) \
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)
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#define g_chunk_new(type, chunk) ( \
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(type *) g_mem_chunk_alloc (chunk) \
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)
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#define g_chunk_new0(type, chunk) ( \
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(type *) g_mem_chunk_alloc0 (chunk) \
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)
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#define g_chunk_free(mem, mem_chunk) G_STMT_START { \
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g_mem_chunk_free ((mem_chunk), (mem)); \
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} G_STMT_END
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/* "g_mem_chunk_new" creates a new memory chunk.
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* Memory chunks are used to allocate pieces of memory which are
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* always the same size. Lists are a good example of such a data type.
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* The memory chunk allocates and frees blocks of memory as needed.
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* Just be sure to call "g_mem_chunk_free" and not "g_free" on data
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* allocated in a mem chunk. ("g_free" will most likely cause a seg
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* fault...somewhere).
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*
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* Oh yeah, GMemChunk is an opaque data type. (You don't really
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* want to know what's going on inside do you?)
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*/
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/* ALLOC_ONLY MemChunk's can only allocate memory. The free operation
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* is interpreted as a no op. ALLOC_ONLY MemChunk's save 4 bytes per
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* atom. (They are also useful for lists which use MemChunk to allocate
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* memory but are also part of the MemChunk implementation).
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* ALLOC_AND_FREE MemChunk's can allocate and free memory.
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*/
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#define G_ALLOC_ONLY 1
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#define G_ALLOC_AND_FREE 2
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GMemChunk* g_mem_chunk_new (gchar *name,
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gint atom_size,
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gulong area_size,
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gint type);
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void g_mem_chunk_destroy (GMemChunk *mem_chunk);
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gpointer g_mem_chunk_alloc (GMemChunk *mem_chunk);
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gpointer g_mem_chunk_alloc0 (GMemChunk *mem_chunk);
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void g_mem_chunk_free (GMemChunk *mem_chunk,
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gpointer mem);
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void g_mem_chunk_clean (GMemChunk *mem_chunk);
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void g_mem_chunk_reset (GMemChunk *mem_chunk);
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void g_mem_chunk_print (GMemChunk *mem_chunk);
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void g_mem_chunk_info (void);
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/* Ah yes...we have a "g_blow_chunks" function.
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* "g_blow_chunks" simply compresses all the chunks. This operation
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* consists of freeing every memory area that should be freed (but
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* which we haven't gotten around to doing yet). And, no,
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* "g_blow_chunks" doesn't follow the naming scheme, but it is a
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* much better name than "g_mem_chunk_clean_all" or something
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* similar.
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*/
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void g_blow_chunks (void);
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/* Generic allocators
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*/
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GAllocator* g_allocator_new (const gchar *name,
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guint n_preallocs);
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void g_allocator_free (GAllocator *allocator);
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/* internal */
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#define G_ALLOCATOR_LIST (1)
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#define G_ALLOCATOR_SLIST (2)
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#define G_ALLOCATOR_NODE (3)
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G_END_DECLS
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#endif /* __G_MEM_H__ */
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