#include <stdlib.h>

#include <assert.h>

#include "signal.h"

Signal *

signal_new() {

Signal *sig = (Signal *) malloc(sizeof(Signal));

assert(sig);

sig->callbacks = NULL;

return sig;

}

void

signal_on(Signal *sig, Callback cb, void *user_arg) {

CallbackList *l = (CallbackList *) malloc(sizeof(CallbackList));

l->data = cb;

l->user_arg = user_arg;

l->next = sig->callbacks;

sig->callbacks = l;

}

void

signal_emit(Signal *sig, ...) {

va_list args;

va_start(args, sig);

int res;

CallbackList *iter = sig->callbacks;

while(iter != NULL) {

res = iter->data(iter->user_arg, args);

iter = iter->next;

}

va_end(args);

sig->emit_counter++;

}

void

signal_free(Signal *sig) {

CallbackList *iter = sig->callbacks;

CallbackList *prev;

while(iter != NULL) {

prev = iter;

iter = iter->next;

free(prev);

}

free(sig);

}