D-Bus 1.15.12
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DBusMemPool object. More...
Functions | |
DBusMemPool * | _dbus_mem_pool_new (int element_size, dbus_bool_t zero_elements) |
Creates a new memory pool, or returns NULL on failure. | |
void | _dbus_mem_pool_free (DBusMemPool *pool) |
Frees a memory pool (and all elements allocated from it). | |
void * | _dbus_mem_pool_alloc (DBusMemPool *pool) |
Allocates an object from the memory pool. | |
dbus_bool_t | _dbus_mem_pool_dealloc (DBusMemPool *pool, void *element) |
Deallocates an object previously created with _dbus_mem_pool_alloc(). | |
DBusMemPool object.
Types and functions related to DBusMemPool. A memory pool is used to decrease memory fragmentation/overhead and increase speed for blocks of small uniformly-sized objects. The main point is to avoid the overhead of a malloc block for each small object, speed is secondary.
void * _dbus_mem_pool_alloc | ( | DBusMemPool * | pool | ) |
Allocates an object from the memory pool.
The object must be freed with _dbus_mem_pool_dealloc().
pool | the memory pool |
Definition at line 227 of file dbus-mempool.c.
References _dbus_assert, _DBUS_INT_MAX, allocated_elements, block_size, blocks, dbus_malloc(), dbus_malloc0(), element_size, DBusMemBlock::elements, free_elements, DBusFreedElement::next, DBusMemBlock::next, NULL, DBusMemBlock::used_so_far, and zero_elements.
dbus_bool_t _dbus_mem_pool_dealloc | ( | DBusMemPool * | pool, |
void * | element | ||
) |
Deallocates an object previously created with _dbus_mem_pool_alloc().
The previous object must have come from this same pool.
pool | the memory pool |
element | the element earlier allocated. |
Definition at line 366 of file dbus-mempool.c.
References _dbus_assert, _dbus_assert_not_reached, allocated_elements, blocks, dbus_free(), DBusMemBlock::elements, FALSE, free_elements, DBusFreedElement::next, DBusMemBlock::next, and NULL.
Referenced by _dbus_hash_table_free_preallocated_entry().
void _dbus_mem_pool_free | ( | DBusMemPool * | pool | ) |
Frees a memory pool (and all elements allocated from it).
pool | the memory pool. |
Definition at line 200 of file dbus-mempool.c.
References blocks, dbus_free(), DBusMemBlock::next, and NULL.
Referenced by _dbus_hash_table_unref().
DBusMemPool * _dbus_mem_pool_new | ( | int | element_size, |
dbus_bool_t | zero_elements | ||
) |
Creates a new memory pool, or returns NULL on failure.
Objects in the pool must be at least sizeof(void*) bytes each, due to the way memory pools work. To avoid creating 64 bit problems, this means at least 8 bytes on all platforms, unless you are 4 bytes on 32-bit and 8 bytes on 64-bit.
element_size | size of an element allocated from the pool. |
zero_elements | whether to zero-initialize elements |
Definition at line 148 of file dbus-mempool.c.
References _dbus_assert, allocated_elements, block_size, dbus_new0, element_size, FALSE, NULL, and zero_elements.
Referenced by _dbus_hash_table_new().