D-Bus  1.8.1
Macros | Typedefs | Functions

dbus_malloc(), dbus_free(), etc. More...

Macros

#define dbus_new(type, count)   ((type*)dbus_malloc (sizeof (type) * (count)))
 Safe macro for using dbus_malloc(). More...
 
#define dbus_new0(type, count)   ((type*)dbus_malloc0 (sizeof (type) * (count)))
 Safe macro for using dbus_malloc0(). More...
 

Typedefs

typedef void(* DBusFreeFunction )(void *memory)
 The type of a function which frees a block of memory. More...
 

Functions

void * dbus_malloc (size_t bytes)
 Allocates the given number of bytes, as with standard malloc(). More...
 
void * dbus_malloc0 (size_t bytes)
 Allocates the given number of bytes, as with standard malloc(), but all bytes are initialized to zero as with calloc(). More...
 
void * dbus_realloc (void *memory, size_t bytes)
 Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). More...
 
void dbus_free (void *memory)
 Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0(). More...
 
void dbus_free_string_array (char **str_array)
 Frees a NULL-terminated array of strings. More...
 
void dbus_shutdown (void)
 Frees all memory allocated internally by libdbus and reverses the effects of dbus_threads_init(). More...
 

Detailed Description

dbus_malloc(), dbus_free(), etc.

Functions and macros related to allocating and releasing blocks of memory.

Macro Definition Documentation

#define dbus_new (   type,
  count 
)    ((type*)dbus_malloc (sizeof (type) * (count)))

Safe macro for using dbus_malloc().

Accepts the type to allocate and the number of type instances to allocate as arguments, and returns a memory block cast to the desired type, instead of as a void*.

Parameters
typetype name to allocate
countnumber of instances in the allocated array
Returns
the new memory block or NULL on failure

Definition at line 58 of file dbus-memory.h.

Referenced by _dbus_credentials_new(), _dbus_groups_from_uid(), _dbus_listen_systemd_sockets(), _dbus_server_new_for_socket(), dbus_message_copy(), and dbus_parse_address().

#define dbus_new0 (   type,
  count 
)    ((type*)dbus_malloc0 (sizeof (type) * (count)))

Typedef Documentation

DBusFreeFunction

The type of a function which frees a block of memory.

Parameters
memorythe memory to free

Definition at line 64 of file dbus-memory.h.

Function Documentation

DBUS_EXPORT void dbus_free ( void *  memory)

Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().

If passed NULL, does nothing.

Parameters
memoryblock to be freed

Definition at line 701 of file dbus-memory.c.

References _dbus_assert, _dbus_atomic_dec(), and TRUE.

Referenced by _dbus_auth_unref(), _dbus_babysitter_unref(), _dbus_connection_new_for_transport(), _dbus_counter_unref(), _dbus_credentials_add_adt_audit_data(), _dbus_credentials_add_windows_sid(), _dbus_credentials_clear(), _dbus_credentials_unref(), _dbus_data_slot_allocator_free(), _dbus_data_slot_list_free(), _dbus_directory_close(), _dbus_group_info_free(), _dbus_group_info_free_allocated(), _dbus_hash_table_new(), _dbus_hash_table_unref(), _dbus_keyring_unref(), _dbus_listen_systemd_sockets(), _dbus_listen_tcp_socket(), _dbus_mem_pool_dealloc(), _dbus_mem_pool_free(), _dbus_message_loader_new(), _dbus_message_loader_unref(), _dbus_object_tree_new(), _dbus_object_tree_register(), _dbus_object_tree_unref(), _dbus_pending_call_new_unlocked(), _dbus_printf_string_upper_bound(), _dbus_server_finalize_base(), _dbus_server_init_base(), _dbus_server_listen_platform_specific(), _dbus_server_new_for_domain_socket(), _dbus_server_new_for_socket(), _dbus_server_new_for_tcp_socket(), _dbus_split_paths_and_append(), _dbus_string_free(), _dbus_timeout_list_free(), _dbus_timeout_unref(), _dbus_transport_finalize_base(), _dbus_transport_new_for_socket(), _dbus_transport_open(), _dbus_user_database_unref(), _dbus_user_info_free(), _dbus_user_info_free_allocated(), _dbus_watch_list_free(), _dbus_watch_unref(), dbus_address_entries_free(), dbus_connection_free_preallocated_send(), dbus_error_free(), dbus_free_string_array(), dbus_message_copy(), dbus_parse_address(), dbus_realloc(), dbus_set_error(), and dbus_shutdown().

DBUS_EXPORT void dbus_free_string_array ( char **  str_array)
DBUS_EXPORT DBUS_MALLOC void * dbus_malloc ( size_t  bytes)

Allocates the given number of bytes, as with standard malloc().

Guaranteed to return NULL if bytes is zero on all platforms. Returns NULL if the allocation fails. The memory must be released with dbus_free().

dbus_malloc() memory is NOT safe to free with regular free() from the C library. Free it with dbus_free() only.

Parameters
bytesnumber of bytes to allocate
Returns
allocated memory, or NULL if the allocation fails.

Definition at line 461 of file dbus-memory.c.

References _dbus_abort(), _dbus_atomic_inc(), _dbus_warn(), and NULL.

Referenced by _dbus_mem_pool_alloc(), _dbus_memdup(), _dbus_printf_string_upper_bound(), _dbus_strdup(), _dbus_string_copy_data(), and _dbus_string_init_preallocated().

DBUS_EXPORT DBUS_MALLOC void * dbus_malloc0 ( size_t  bytes)

Allocates the given number of bytes, as with standard malloc(), but all bytes are initialized to zero as with calloc().

Guaranteed to return NULL if bytes is zero on all platforms. Returns NULL if the allocation fails. The memory must be released with dbus_free().

dbus_malloc0() memory is NOT safe to free with regular free() from the C library. Free it with dbus_free() only.

Parameters
bytesnumber of bytes to allocate
Returns
allocated memory, or NULL if the allocation fails.

Definition at line 531 of file dbus-memory.c.

References _dbus_abort(), _dbus_atomic_inc(), _dbus_warn(), and NULL.

Referenced by _dbus_mem_pool_alloc().

DBUS_EXPORT DBUS_MALLOC void * dbus_realloc ( void *  memory,
size_t  bytes 
)

Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0().

Guaranteed to free the memory and return NULL if bytes is zero on all platforms. Returns NULL if the resize fails. If the resize fails, the memory is not freed.

Parameters
memoryblock to be resized
bytesnew size of the memory block
Returns
allocated memory, or NULL if the resize fails.

Definition at line 601 of file dbus-memory.c.

References _dbus_abort(), _dbus_atomic_inc(), _dbus_warn(), dbus_free(), FALSE, and NULL.

Referenced by _dbus_data_slot_allocator_alloc(), _dbus_data_slot_list_set(), _dbus_listen_tcp_socket(), and _dbus_message_loader_get_unix_fds().

DBUS_EXPORT void dbus_shutdown ( void  )

Frees all memory allocated internally by libdbus and reverses the effects of dbus_threads_init().

libdbus keeps internal global variables, for example caches and thread locks, and it can be useful to free these internal data structures.

dbus_shutdown() does NOT free memory that was returned to the application. It only frees libdbus-internal data structures.

You MUST free all memory and release all reference counts returned to you by libdbus prior to calling dbus_shutdown().

You can't continue to use any D-Bus objects, such as connections, that were allocated prior to dbus_shutdown(). You can, however, start over; call dbus_threads_init() again, create new connections, and so forth.

WARNING: dbus_shutdown() is NOT thread safe, it must be called while NO other threads are using D-Bus. (Remember, you have to free all D-Bus objects and memory before you call dbus_shutdown(), so no thread can be using libdbus.)

The purpose of dbus_shutdown() is to allow applications to get clean output from memory leak checkers. dbus_shutdown() may also be useful if you want to dlopen() libdbus instead of linking to it, and want to be able to unload the library again.

There is absolutely no requirement to call dbus_shutdown() - in fact, most applications won't bother and should not feel guilty.

You have to know that nobody is using libdbus in your application's process before you can call dbus_shutdown(). One implication of this is that calling dbus_shutdown() from a library is almost certainly wrong, since you don't know what the rest of the app is up to.

Definition at line 890 of file dbus-memory.c.

References _dbus_threads_lock_platform_specific(), _dbus_threads_unlock_platform_specific(), ShutdownClosure::data, dbus_free(), ShutdownClosure::func, ShutdownClosure::next, and NULL.