79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
#include "config.h"
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#include <assert.h>
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#include <common/msg_queue.h>
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#include <common/utils.h>
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#include <wire/wire.h>
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struct msg_queue {
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bool fd_passing;
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const u8 **q;
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};
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struct msg_queue *msg_queue_new(const tal_t *ctx, bool fd_passing)
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{
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struct msg_queue *q = tal(ctx, struct msg_queue);
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q->fd_passing = fd_passing;
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q->q = tal_arr(q, const u8 *, 0);
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return q;
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}
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static void do_enqueue(struct msg_queue *q, const u8 *add TAKES)
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{
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tal_arr_expand(&q->q, tal_dup_talarr(q, u8, add));
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/* In case someone is waiting */
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io_wake(q);
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}
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size_t msg_queue_length(const struct msg_queue *q)
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{
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return tal_count(q->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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if (q->fd_passing)
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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, u8, 0);
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assert(q->fd_passing);
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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 struct msg_queue *q, 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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assert(q->fd_passing);
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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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void msg_wake(const struct msg_queue *q)
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{
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io_wake(q);
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}
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