X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=glib%2Fgslice.c;h=0563d8092dd173d3907dcea8f46d41243da9b211;hb=7e3d32b7053b47ca7feecf185abac96b619770c2;hp=24ce62f699fbfc8de73416f432074915df218ce8;hpb=6e4a7fca431f53fdfd89afbe956212229cf52200;p=platform%2Fupstream%2Fglib.git diff --git a/glib/gslice.c b/glib/gslice.c index 24ce62f..0563d80 100644 --- a/glib/gslice.c +++ b/glib/gslice.c @@ -12,9 +12,7 @@ * 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. + * License along with this library; if not, see . */ /* MT safe */ @@ -32,7 +30,7 @@ #include #include -#ifdef HAVE_UNISTD_H +#ifdef G_OS_UNIX #include /* sysconf() */ #endif #ifdef G_OS_WIN32 @@ -68,12 +66,13 @@ * * To achieve these goals, the slice allocator uses a sophisticated, * layered design that has been inspired by Bonwick's slab allocator - * - * [Bonwick94] Jeff Bonwick, The slab allocator: An object-caching kernel + * ([Bonwick94](http://citeseer.ist.psu.edu/bonwick94slab.html) + * Jeff Bonwick, The slab allocator: An object-caching kernel * memory allocator. USENIX 1994, and - * [Bonwick01] Bonwick and Jonathan Adams, Magazines and vmem: Extending the - * slab allocator to many cpu's and arbitrary resources. USENIX 2001 - * . + * [Bonwick01](http://citeseer.ist.psu.edu/bonwick01magazines.html) + * Bonwick and Jonathan Adams, Magazines and vmem: Extending the + * slab allocator to many cpu's and arbitrary resources. USENIX 2001) + * * It uses posix_memalign() to optimize allocations of many equally-sized * chunks, and has per-thread free lists (the so-called magazine layer) * to quickly satisfy allocation requests of already known structure sizes. @@ -88,42 +87,39 @@ * unlike malloc(), it does not reserve extra space per block. For large block * sizes, g_slice_new() and g_slice_alloc() will automatically delegate to the * system malloc() implementation. For newly written code it is recommended - * to use the new g_slice API instead of g_malloc() and + * to use the new `g_slice` API instead of g_malloc() and * friends, as long as objects are not resized during their lifetime and the * object size used at allocation time is still available when freeing. * - * - * Using the slice allocator - * + * Here is an example for using the slice allocator: + * |[ * gchar *mem[10000]; * gint i; * - * /* Allocate 10000 blocks. */ - * for (i = 0; i < 10000; i++) + * // Allocate 10000 blocks. + * for (i = 0; i < 10000; i++) * { * mem[i] = g_slice_alloc (50); * - * /* Fill in the memory with some junk. */ - * for (j = 0; j < 50; j++) + * // Fill in the memory with some junk. + * for (j = 0; j < 50; j++) * mem[i][j] = i * j; * } * - * /* Now free all of the blocks. */ - * for (i = 0; i < 10000; i++) - * { - * g_slice_free1 (50, mem[i]); - * } - * + * // Now free all of the blocks. + * for (i = 0; i < 10000; i++) + * g_slice_free1 (50, mem[i]); + * ]| * - * - * Using the slice allocator with data structures - * + * And here is an example for using the using the slice allocator + * with data structures: + * |[ * GRealArray *array; * - * /* Allocate one block, using the g_slice_new() macro. */ + * // Allocate one block, using the g_slice_new() macro. * array = g_slice_new (GRealArray); - * /* We can now use array just like a normal pointer to a structure. */ + * // We can now use array just like a normal pointer to a structure. * array->data = NULL; * array->len = 0; * array->alloc = 0; @@ -131,9 +127,9 @@ * array->clear = (clear ? 1 : 0); * array->elt_size = elt_size; * - * /* We can free the block, so it can be reused. */ + * // We can free the block, so it can be reused. * g_slice_free (GRealArray, array); - * + * ]| */ /* the GSlice allocator is split up into 4 layers, roughly modelled after the slab @@ -871,11 +867,10 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * A convenience macro to allocate a block of memory from the * slice allocator. * - * It calls g_slice_alloc() with sizeof (@type) - * and casts the returned pointer to a pointer of the given type, - * avoiding a type cast in the source code. - * Note that the underlying slice allocation mechanism can - * be changed with the G_SLICE=always-malloc + * It calls g_slice_alloc() with `sizeof (@type)` and casts the + * returned pointer to a pointer of the given type, avoiding a type + * cast in the source code. Note that the underlying slice allocation + * mechanism can be changed with the [`G_SLICE=always-malloc`][G_SLICE] * environment variable. * * Returns: a pointer to the allocated block, cast to a pointer to @type @@ -890,11 +885,11 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * A convenience macro to allocate a block of memory from the * slice allocator and set the memory to 0. * - * It calls g_slice_alloc0() with sizeof (@type) + * It calls g_slice_alloc0() with `sizeof (@type)` * and casts the returned pointer to a pointer of the given type, * avoiding a type cast in the source code. * Note that the underlying slice allocation mechanism can - * be changed with the G_SLICE=always-malloc + * be changed with the [`G_SLICE=always-malloc`][G_SLICE] * environment variable. * * Since: 2.10 @@ -908,11 +903,11 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * A convenience macro to duplicate a block of memory using * the slice allocator. * - * It calls g_slice_copy() with sizeof (@type) + * It calls g_slice_copy() with `sizeof (@type)` * and casts the returned pointer to a pointer of the given type, * avoiding a type cast in the source code. * Note that the underlying slice allocation mechanism can - * be changed with the G_SLICE=always-malloc + * be changed with the [`G_SLICE=always-malloc`][G_SLICE] * environment variable. * * Returns: a pointer to the allocated block, cast to a pointer to @type @@ -928,12 +923,11 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * A convenience macro to free a block of memory that has * been allocated from the slice allocator. * - * It calls g_slice_free1() using sizeof (type) + * It calls g_slice_free1() using `sizeof (type)` * as the block size. * Note that the exact release behaviour can be changed with the - * G_DEBUG=gc-friendly environment - * variable, also see G_SLICE for - * related debugging options. + * [`G_DEBUG=gc-friendly`][G_DEBUG] environment variable, also see + * [`G_SLICE`][G_SLICE] for related debugging options. * * Since: 2.10 */ @@ -950,9 +944,8 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * a @next pointer (similar to #GSList). The name of the * @next field in @type is passed as third argument. * Note that the exact release behaviour can be changed with the - * G_DEBUG=gc-friendly environment - * variable, also see G_SLICE for - * related debugging options. + * [`G_DEBUG=gc-friendly`][G_DEBUG] environment variable, also see + * [`G_SLICE`][G_SLICE] for related debugging options. * * Since: 2.10 */ @@ -963,12 +956,12 @@ thread_memory_magazine2_free (ThreadMemory *tmem, * * Allocates a block of memory from the slice allocator. * The block adress handed out can be expected to be aligned - * to at least 1 * sizeof (void*), + * to at least 1 * sizeof (void*), * though in general slices are 2 * sizeof (void*) bytes aligned, * if a malloc() fallback implementation is used instead, * the alignment may be reduced in a libc dependent fashion. * Note that the underlying slice allocation mechanism can - * be changed with the G_SLICE=always-malloc + * be changed with the [`G_SLICE=always-malloc`][G_SLICE] * environment variable. * * Returns: a pointer to the allocated memory block @@ -1026,8 +1019,7 @@ g_slice_alloc (gsize mem_size) * * Allocates a block of memory via g_slice_alloc() and initializes * the returned memory to 0. Note that the underlying slice allocation - * mechanism can be changed with the - * G_SLICE=always-malloc + * mechanism can be changed with the [`G_SLICE=always-malloc`][G_SLICE] * environment variable. * * Returns: a pointer to the allocated block @@ -1075,10 +1067,8 @@ g_slice_copy (gsize mem_size, * The memory must have been allocated via g_slice_alloc() or * g_slice_alloc0() and the @block_size has to match the size * specified upon allocation. Note that the exact release behaviour - * can be changed with the - * G_DEBUG=gc-friendly environment - * variable, also see G_SLICE for - * related debugging options. + * can be changed with the [`G_DEBUG=gc-friendly`][G_DEBUG] environment + * variable, also see [`G_SLICE`][G_SLICE] for related debugging options. * * Since: 2.10 */ @@ -1137,9 +1127,8 @@ g_slice_free1 (gsize mem_size, * @next pointer (similar to #GSList). The offset of the @next * field in each block is passed as third argument. * Note that the exact release behaviour can be changed with the - * G_DEBUG=gc-friendly environment - * variable, also see G_SLICE for - * related debugging options. + * [`G_DEBUG=gc-friendly`][G_DEBUG] environment variable, also see + * [`G_SLICE`][G_SLICE] for related debugging options. * * Since: 2.10 */