int supplicant_dbus_method_call(const char *path,
const char *interface, const char *method,
supplicant_dbus_setup_function setup,
supplicant_dbus_result_function function,
void *user_data)
{
struct method_call_data *data;
DBusMessage *message;
DBusMessageIter iter;
DBusPendingCall *call;
if (connection == NULL)
return -EINVAL;
if (path == NULL || interface == NULL || method == NULL)
return -EINVAL;
data = dbus_malloc0(sizeof(*data));
if (data == NULL)
return -ENOMEM;
message = dbus_message_new_method_call(SUPPLICANT_SERVICE, path,
interface, method);
if (message == NULL) {
dbus_free(data);
return -ENOMEM;
}
dbus_message_set_auto_start(message, FALSE);
dbus_message_iter_init_append(message, &iter);
if (setup != NULL)
setup(&iter, user_data);
if (dbus_connection_send_with_reply(connection, message,
&call, TIMEOUT) == FALSE) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
if (call == NULL) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
data->function = function;
data->user_data = user_data;
dbus_pending_call_set_notify(call, method_call_reply,
data, dbus_free);
dbus_message_unref(message);
return 0;
}
int supplicant_dbus_property_get(const char *path, const char *interface,
const char *method,
supplicant_dbus_property_function function,
void *user_data)
{
struct property_get_data *data;
DBusMessage *message;
DBusPendingCall *call;
if (connection == NULL)
return -EINVAL;
if (path == NULL || interface == NULL || method == NULL)
return -EINVAL;
data = dbus_malloc0(sizeof(*data));
if (data == NULL)
return -ENOMEM;
message = dbus_message_new_method_call(SUPPLICANT_SERVICE, path,
DBUS_INTERFACE_PROPERTIES, "Get");
if (message == NULL) {
dbus_free(data);
return -ENOMEM;
}
dbus_message_set_auto_start(message, FALSE);
dbus_message_append_args(message, DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &method, NULL);
if (dbus_connection_send_with_reply(connection, message,
&call, TIMEOUT) == FALSE) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
if (call == NULL) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
data->function = function;
data->user_data = user_data;
dbus_pending_call_set_notify(call, property_get_reply,
data, dbus_free);
dbus_message_unref(message);
return 0;
}
int supplicant_dbus_property_set(const char *path, const char *interface,
const char *key, const char *signature,
supplicant_dbus_setup_function setup,
supplicant_dbus_result_function function,
void *user_data)
{
struct property_set_data *data;
DBusMessage *message;
DBusMessageIter iter, value;
DBusPendingCall *call;
if (connection == NULL)
return -EINVAL;
if (path == NULL || interface == NULL)
return -EINVAL;
if (key == NULL || signature == NULL || setup == NULL)
return -EINVAL;
data = dbus_malloc0(sizeof(*data));
if (data == NULL)
return -ENOMEM;
message = dbus_message_new_method_call(SUPPLICANT_SERVICE, path,
DBUS_INTERFACE_PROPERTIES, "Set");
if (message == NULL) {
dbus_free(data);
return -ENOMEM;
}
dbus_message_set_auto_start(message, FALSE);
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &key);
dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT,
signature, &value);
setup(&value, user_data);
dbus_message_iter_close_container(&iter, &value);
if (dbus_connection_send_with_reply(connection, message,
&call, TIMEOUT) == FALSE) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
if (call == NULL) {
dbus_message_unref(message);
dbus_free(data);
return -EIO;
}
data->function = function;
data->user_data = user_data;
dbus_pending_call_set_notify(call, property_set_reply,
data, dbus_free);
dbus_message_unref(message);
return 0;
}
static void
time_for_size (int size)
{
int i;
int j;
clock_t start;
clock_t end;
#define FREE_ARRAY_SIZE 512
#define N_ITERATIONS FREE_ARRAY_SIZE * 512
void *to_free[FREE_ARRAY_SIZE];
DBusMemPool *pool;
_dbus_verbose ("Timings for size %d\n", size);
_dbus_verbose (" malloc\n");
start = clock ();
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = dbus_malloc (size);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
dbus_free (to_free[j]);
++j;
}
j = 0;
}
++i;
}
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" mempools\n");
start = clock ();
pool = _dbus_mem_pool_new (size, FALSE);
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = _dbus_mem_pool_alloc (pool);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
_dbus_mem_pool_dealloc (pool, to_free[j]);
++j;
}
j = 0;
}
++i;
}
_dbus_mem_pool_free (pool);
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" zeroed malloc\n");
start = clock ();
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = dbus_malloc0 (size);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
dbus_free (to_free[j]);
++j;
}
j = 0;
}
++i;
}
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
_dbus_verbose (" zeroed mempools\n");
start = clock ();
pool = _dbus_mem_pool_new (size, TRUE);
i = 0;
j = 0;
while (i < N_ITERATIONS)
{
to_free[j] = _dbus_mem_pool_alloc (pool);
_dbus_assert (to_free[j] != NULL); /* in a real app of course this is wrong */
++j;
if (j == FREE_ARRAY_SIZE)
{
j = 0;
while (j < FREE_ARRAY_SIZE)
{
_dbus_mem_pool_dealloc (pool, to_free[j]);
++j;
}
j = 0;
}
++i;
}
_dbus_mem_pool_free (pool);
end = clock ();
_dbus_verbose (" created/destroyed %d elements in %g seconds\n",
N_ITERATIONS, (end - start) / (double) CLOCKS_PER_SEC);
}
/**
* Allocates an object from the memory pool.
* The object must be freed with _dbus_mem_pool_dealloc().
*
* @param pool the memory pool
* @returns the allocated object or #NULL if no memory.
*/
void*
_dbus_mem_pool_alloc (DBusMemPool *pool)
{
#ifdef DBUS_BUILD_TESTS
if (_dbus_disable_mem_pools ())
{
DBusMemBlock *block;
int alloc_size;
/* This is obviously really silly, but it's
* debug-mode-only code that is compiled out
* when tests are disabled (_dbus_disable_mem_pools()
* is a constant expression FALSE so this block
* should vanish)
*/
alloc_size = sizeof (DBusMemBlock) - ELEMENT_PADDING +
pool->element_size;
if (pool->zero_elements)
block = dbus_malloc0 (alloc_size);
else
block = dbus_malloc (alloc_size);
if (block != NULL)
{
block->next = pool->blocks;
pool->blocks = block;
pool->allocated_elements += 1;
return (void*) &block->elements[0];
}
else
return NULL;
}
else
#endif
{
if (_dbus_decrement_fail_alloc_counter ())
{
_dbus_verbose (" FAILING mempool alloc\n");
return NULL;
}
else if (pool->free_elements)
{
DBusFreedElement *element = pool->free_elements;
pool->free_elements = pool->free_elements->next;
if (pool->zero_elements)
memset (element, '\0', pool->element_size);
pool->allocated_elements += 1;
return element;
}
else
{
void *element;
if (pool->blocks == NULL ||
pool->blocks->used_so_far == pool->block_size)
{
/* Need a new block */
DBusMemBlock *block;
int alloc_size;
#ifdef DBUS_BUILD_TESTS
int saved_counter;
#endif
if (pool->block_size <= _DBUS_INT_MAX / 4) /* avoid overflow */
{
/* use a larger block size for our next block */
pool->block_size *= 2;
_dbus_assert ((pool->block_size %
pool->element_size) == 0);
}
alloc_size = sizeof (DBusMemBlock) - ELEMENT_PADDING + pool->block_size;
#ifdef DBUS_BUILD_TESTS
/* We save/restore the counter, so that memory pools won't
* cause a given function to have different number of
* allocations on different invocations. i.e. when testing
* we want consistent alloc patterns. So we skip our
* malloc here for purposes of failed alloc simulation.
*/
saved_counter = _dbus_get_fail_alloc_counter ();
_dbus_set_fail_alloc_counter (_DBUS_INT_MAX);
#endif
if (pool->zero_elements)
block = dbus_malloc0 (alloc_size);
else
block = dbus_malloc (alloc_size);
#ifdef DBUS_BUILD_TESTS
_dbus_set_fail_alloc_counter (saved_counter);
_dbus_assert (saved_counter == _dbus_get_fail_alloc_counter ());
#endif
if (block == NULL)
return NULL;
block->used_so_far = 0;
block->next = pool->blocks;
pool->blocks = block;
}
element = &pool->blocks->elements[pool->blocks->used_so_far];
pool->blocks->used_so_far += pool->element_size;
pool->allocated_elements += 1;
return element;
}
}
}