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improve the "simple" callback mechanism, so more than one listener is possible 

svn path=/trunk/; revision=24936
This commit is contained in:
Ulf Lamping 2008-04-12 15:16:52 +00:00
parent 3098afe6ad
commit 875e4ed653
1 changed files with 40 additions and 14 deletions
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54
file.c
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@ -131,34 +131,60 @@ static gboolean copy_binary_file(const char *from_filename, const char *to_fil
#define FRAME_DATA_CHUNK_SIZE 1024
/* one callback for now, we could have a list later */
static cf_callback_t cf_cb = NULL;
static gpointer cf_cb_user_data = NULL;
/* this callback mechanism should possibly be replaced by the g_signal_...() stuff (if I only would know how :-) */
typedef struct {
cf_callback_t cb_fct;
gpointer user_data;
} cf_callback_data_t;
GList *cf_callbacks = NULL;
void
cf_callback_invoke(int event, gpointer data)
{
g_assert(cf_cb != NULL);
cf_cb(event, data, cf_cb_user_data);
cf_callback_data_t *cb;
GList *cb_item = cf_callbacks;
/* there should be at least one interested */
g_assert(cb_item != NULL);
while(cb_item != NULL) {
cb = cb_item->data;
cb->cb_fct(event, data, cb->user_data);
cb_item = g_list_next(cb_item);
}
}
void
cf_callback_add(cf_callback_t func, gpointer user_data)
{
/* More than one callback listener is currently not implemented,
but should be easy to do. */
g_assert(cf_cb == NULL);
cf_cb = func;
cf_cb_user_data = user_data;
cf_callback_data_t *cb;
cb = g_malloc(sizeof(cf_callback_data_t));
cb->cb_fct = func;
cb->user_data = user_data;
cf_callbacks = g_list_append(cf_callbacks, cb);
}
void
cf_callback_remove(cf_callback_t func _U_)
cf_callback_remove(cf_callback_t func)
{
g_assert(cf_cb != NULL);
cf_cb = NULL;
cf_cb_user_data = NULL;
cf_callback_data_t *cb;
GList *cb_item = cf_callbacks;
while(cb_item != NULL) {
cb = cb_item->data;
if(cb->cb_fct == func) {
g_list_remove(cf_callbacks, cb);
g_free(cb);
return;
}
cb_item = g_list_next(cb_item);
}
g_assert_not_reached();
}
void