* 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 <http://www.gnu.org/licenses/>.
*/
/*
*
* These functions provide support for allocating and freeing memory.
*
- * <note>
* If any call to allocate memory fails, the application is terminated.
* This also means that there is no need to check if the call succeeded.
- * </note>
- *
- * <note>
- * It's important to match g_malloc() with g_free(), plain malloc() with free(),
- * and (if you're using C++) new with delete and new[] with delete[]. Otherwise
- * bad things can happen, since these allocators may use different memory
- * pools (and new/delete call constructors and destructors). See also
- * g_mem_set_vtable().
- * </note>
+ *
+ * It's important to match g_malloc() (and wrappers such as g_new()) with
+ * g_free(), g_slice_alloc() (and wrappers such as g_slice_new()) with
+ * g_slice_free(), plain malloc() with free(), and (if you're using C++)
+ * new with delete and new[] with delete[]. Otherwise bad things can happen,
+ * since these allocators may use different memory pools (and new/delete call
+ * constructors and destructors). See also g_mem_set_vtable().
*/
/* --- functions --- */
/**
* g_realloc:
- * @mem: the memory to reallocate
+ * @mem: (allow-none): the memory to reallocate
* @n_bytes: new size of the memory in bytes
*
* Reallocates the memory pointed to by @mem, so that it now has space for
/**
* g_free:
- * @mem: the memory to free
+ * @mem: (allow-none): the memory to free
*
* Frees the memory pointed to by @mem.
* If @mem is %NULL it simply returns.
* Otherwise, the variable is destroyed using @destroy and the
* pointer is set to %NULL.
*
- * This function is threadsafe and modifies the pointer atomically,
- * using memory barriers where needed.
- *
* A macro is also included that allows this function to be used without
* pointer casts.
*
{
gpointer _p;
- /* This is a little frustrating.
- * Would be nice to have an atomic exchange (with no compare).
- */
- do
- _p = g_atomic_pointer_get (pp);
- while G_UNLIKELY (!g_atomic_pointer_compare_and_exchange (pp, _p, NULL));
-
+ _p = *pp;
if (_p)
- destroy (_p);
+ {
+ *pp = NULL;
+ destroy (_p);
+ }
}
/**
/**
* g_realloc_n:
- * @mem: the memory to reallocate
+ * @mem: (allow-none): the memory to reallocate
* @n_blocks: the number of blocks to allocate
* @n_block_bytes: the size of each block in bytes
*
*
* A different allocator can be set using g_mem_set_vtable().
*
- * Return value: if %TRUE, malloc() and g_malloc() can be mixed.
+ * Returns: if %TRUE, malloc() and g_malloc() can be mixed.
**/
gboolean
g_mem_is_system_malloc (void)
* g_mem_set_vtable:
* @vtable: table of memory allocation routines.
*
- * Sets the #GMemVTable to use for memory allocation. You can use this to provide
- * custom memory allocation routines. <emphasis>This function must be called
- * before using any other GLib functions.</emphasis> The @vtable only needs to
- * provide malloc(), realloc(), and free() functions; GLib can provide default
- * implementations of the others. The malloc() and realloc() implementations
- * should return %NULL on failure, GLib will handle error-checking for you.
- * @vtable is copied, so need not persist after this function has been called.
+ * Sets the #GMemVTable to use for memory allocation. You can use this
+ * to provide custom memory allocation routines.
+ *
+ * The @vtable only needs to provide malloc(), realloc(), and free()
+ * functions; GLib can provide default implementations of the others.
+ * The malloc() and realloc() implementations should return %NULL on
+ * failure, GLib will handle error-checking for you. @vtable is copied,
+ * so need not persist after this function has been called.
+ *
+ * Note that this function must be called before using any other GLib
+ * functions.
*/
void
g_mem_set_vtable (GMemVTable *vtable)
static gsize profile_zinit = 0;
static gsize profile_frees = 0;
static GMutex gmem_profile_mutex;
-#ifdef G_ENABLE_DEBUG
-static volatile gsize g_trap_free_size = 0;
-static volatile gsize g_trap_realloc_size = 0;
-static volatile gsize g_trap_malloc_size = 0;
-#endif /* G_ENABLE_DEBUG */
#define PROFILE_TABLE(f1,f2,f3) ( ( ((f3) << 2) | ((f2) << 1) | (f1) ) * (MEM_PROFILE_TABLE_SIZE + 1))
{
gsize *p;
-#ifdef G_ENABLE_DEBUG
- if (g_trap_malloc_size == n_bytes)
- G_BREAKPOINT ();
-#endif /* G_ENABLE_DEBUG */
-
p = malloc (sizeof (gsize) * 2 + n_bytes);
if (p)
gsize l = n_blocks * n_block_bytes;
gsize *p;
-#ifdef G_ENABLE_DEBUG
- if (g_trap_malloc_size == l)
- G_BREAKPOINT ();
-#endif /* G_ENABLE_DEBUG */
-
p = calloc (1, sizeof (gsize) * 2 + l);
if (p)
}
else
{
-#ifdef G_ENABLE_DEBUG
- if (g_trap_free_size == p[1])
- G_BREAKPOINT ();
-#endif /* G_ENABLE_DEBUG */
-
profiler_log (PROFILER_FREE,
p[1], /* length */
TRUE);
gsize *p = mem;
p -= 2;
-
-#ifdef G_ENABLE_DEBUG
- if (g_trap_realloc_size == n_bytes)
- G_BREAKPOINT ();
-#endif /* G_ENABLE_DEBUG */
if (mem && p[0]) /* free count */
{
projects / platform / upstream / glib.git / blobdiff