void midi_engine_stop(void)
{
struct midi_provider *n, *p;
struct midi_port *q;
if (!_connected) return;
if (!midi_mutex) return;
SDL_mutexP(midi_mutex);
for (n = port_providers; n;) {
p = n->next;
q = NULL;
while (midi_port_foreach(p, &q)) {
midi_port_unregister(q->num);
}
if (n->thread) {
SDL_KillThread(n->thread);
}
free(n->name);
free(n);
n = p;
}
_connected = 0;
SDL_mutexV(midi_mutex);
}
static void _ip_poll(struct midi_provider *p)
{
static int last_buildout = 0;
struct midi_port *ptr;
char *buffer;
long i = 0;
long m;
SDL_mutexP(blocker);
m = (volatile int)real_num_ports;
if (m < last_buildout) {
ptr = NULL;
while (midi_port_foreach(p, &ptr)) {
i = INT_SHAPED_PTR(ptr->userdata);
if (i >= m) {
midi_port_unregister(ptr->num);
//port_top[i] (the address where ptr points to) is freed in midi_port_unregister.
//So clear it to avoid midi_port_foreach crashing on next round
ptr = NULL;
}
}
last_buildout = m;
} else if (m > last_buildout) {
for (i = last_buildout; i < m; i++) {
buffer = NULL;
if (asprintf(&buffer, " Multicast/IP MIDI %lu", i+1) == -1) {
perror("asprintf");
exit(255);
}
if (!buffer) {
perror("asprintf");
exit(255);
}
midi_port_register(p, MIDI_INPUT | MIDI_OUTPUT, buffer,
PTR_SHAPED_INT((intptr_t)i), 0);
}
last_buildout = m;
}
SDL_mutexV(blocker);
}
