core-lightning/lightningd/msg_queue.c
Rusty Russell cd62b74b1c lightningd/msg_queue: helper for queues of messages/
Since they're short, we use a simple array.  This can be replaced later.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2017-03-10 21:45:55 +10:30

31 lines
533 B
C

#include <lightningd/msg_queue.h>
void msg_queue_init(struct msg_queue *q, const tal_t *ctx)
{
q->q = tal_arr(ctx, const u8 *, 0);
}
void msg_enqueue(struct msg_queue *q, const u8 *add)
{
size_t n = tal_count(q->q);
tal_resize(&q->q, n+1);
q->q[n] = add;
/* In case someone is waiting */
io_wake(q);
}
const u8 *msg_dequeue(struct msg_queue *q)
{
size_t n = tal_count(q->q);
const u8 *msg;
if (!n)
return NULL;
msg = q->q[0];
memmove(q->q, q->q + 1, sizeof(*q->q) * (n-1));
tal_resize(&q->q, n-1);
return msg;
}