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59 lines
1.2 KiB
59 lines
1.2 KiB
#include <assert.h>
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#include <ccan/take/take.h>
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#include <lightningd/msg_queue.h>
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#include <wire/wire.h>
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void msg_queue_init(struct msg_queue *q, const tal_t *ctx)
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{
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q->q = tal_arr(ctx, const u8 *, 0);
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q->ctx = ctx;
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}
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static void do_enqueue(struct msg_queue *q, const u8 *add)
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{
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size_t n = tal_count(q->q);
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tal_resize(&q->q, n+1);
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q->q[n] = tal_dup_arr(q->ctx, u8, add, tal_len(add), 0);
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/* In case someone is waiting */
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io_wake(q);
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}
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void msg_enqueue(struct msg_queue *q, const u8 *add)
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{
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assert(fromwire_peektype(add) != MSG_PASS_FD);
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do_enqueue(q, add);
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}
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void msg_enqueue_fd(struct msg_queue *q, int fd)
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{
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u8 *fdmsg = tal_arr(q->ctx, u8, 0);
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towire_u16(&fdmsg, MSG_PASS_FD);
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towire_u32(&fdmsg, fd);
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do_enqueue(q, take(fdmsg));
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}
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const u8 *msg_dequeue(struct msg_queue *q)
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{
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size_t n = tal_count(q->q);
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const u8 *msg;
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if (!n)
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return NULL;
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msg = q->q[0];
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memmove(q->q, q->q + 1, sizeof(*q->q) * (n-1));
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tal_resize(&q->q, n-1);
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return msg;
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}
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int msg_extract_fd(const u8 *msg)
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{
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const u8 *p = msg + sizeof(u16);
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size_t len = tal_count(msg) - sizeof(u16);
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if (fromwire_peektype(msg) != MSG_PASS_FD)
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return -1;
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return fromwire_u32(&p, &len);
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}
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