/* GLIB sliced memory - fast threaded memory chunk allocator * Copyright (C) 2005 Tim Janik * * 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 2.1 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, see <http://www.gnu.org/licenses/>. */ #ifndef __G_SLICE_H__ #define __G_SLICE_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif #include <glib/gtypes.h> #include <string.h> G_BEGIN_DECLS /* slices - fast allocation/release of small memory blocks */ GLIB_AVAILABLE_IN_ALL gpointer g_slice_alloc (gsize block_size) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1); GLIB_AVAILABLE_IN_ALL gpointer g_slice_alloc0 (gsize block_size) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1); GLIB_AVAILABLE_IN_ALL gpointer g_slice_copy (gsize block_size, gconstpointer mem_block) G_GNUC_ALLOC_SIZE(1); GLIB_AVAILABLE_IN_ALL void g_slice_free1 (gsize block_size, gpointer mem_block); GLIB_AVAILABLE_IN_ALL void g_slice_free_chain_with_offset (gsize block_size, gpointer mem_chain, gsize next_offset); #define g_slice_new(type) ((type*) g_slice_alloc (sizeof (type))) /* Allow the compiler to inline memset(). Since the size is a constant, this * can significantly improve performance. */ #if defined (__GNUC__) && (__GNUC__ >= 2) && defined (__OPTIMIZE__) # define g_slice_new0(type) \ (type *) (G_GNUC_EXTENSION ({ \ gsize __s = sizeof (type); \ gpointer __p; \ __p = g_slice_alloc (__s); \ memset (__p, 0, __s); \ __p; \ })) #else # define g_slice_new0(type) ((type*) g_slice_alloc0 (sizeof (type))) #endif /* MemoryBlockType * * g_slice_dup (MemoryBlockType, * MemoryBlockType *mem_block); * g_slice_free (MemoryBlockType, * MemoryBlockType *mem_block); * g_slice_free_chain (MemoryBlockType, * MemoryBlockType *first_chain_block, * memory_block_next_field); * pseudo prototypes for the macro * definitions following below. */ /* we go through extra hoops to ensure type safety */ #define g_slice_dup(type, mem) \ (1 ? (type*) g_slice_copy (sizeof (type), (mem)) \ : ((void) ((type*) 0 == (mem)), (type*) 0)) #define g_slice_free(type, mem) \ G_STMT_START { \ if (1) g_slice_free1 (sizeof (type), (mem)); \ else (void) ((type*) 0 == (mem)); \ } G_STMT_END #define g_slice_free_chain(type, mem_chain, next) \ G_STMT_START { \ if (1) g_slice_free_chain_with_offset (sizeof (type), \ (mem_chain), G_STRUCT_OFFSET (type, next)); \ else (void) ((type*) 0 == (mem_chain)); \ } G_STMT_END /* --- internal debugging API --- */ typedef enum { G_SLICE_CONFIG_ALWAYS_MALLOC = 1, G_SLICE_CONFIG_BYPASS_MAGAZINES, G_SLICE_CONFIG_WORKING_SET_MSECS, G_SLICE_CONFIG_COLOR_INCREMENT, G_SLICE_CONFIG_CHUNK_SIZES, G_SLICE_CONFIG_CONTENTION_COUNTER } GSliceConfig; GLIB_DEPRECATED_IN_2_34 void g_slice_set_config (GSliceConfig ckey, gint64 value); GLIB_DEPRECATED_IN_2_34 gint64 g_slice_get_config (GSliceConfig ckey); GLIB_DEPRECATED_IN_2_34 gint64* g_slice_get_config_state (GSliceConfig ckey, gint64 address, guint *n_values); #ifdef G_ENABLE_DEBUG GLIB_AVAILABLE_IN_ALL void g_slice_debug_tree_statistics (void); #endif G_END_DECLS #endif /* __G_SLICE_H__ */