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optimize ikcp_send for stream mode

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skywind3000 2016-07-26 11:27:13 +08:00
parent f14622a495
commit 0cdfb61941
1 changed files with 30 additions and 0 deletions
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30
ikcp.c
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@ -463,6 +463,36 @@ int ikcp_send(ikcpcb *kcp, const char *buffer, int len)
assert(kcp->mss > 0);
if (len < 0) return -1;
// append to previous segment in streaming mode (if possible)
if (kcp->stream != 0) {
if (!iqueue_is_empty(&kcp->snd_queue)) {
IKCPSEG *old = iqueue_entry(kcp->snd_queue.prev, IKCPSEG, node);
if (old->len < kcp->mss) {
int capacity = kcp->mss - old->len;
int extend = (len < capacity)? len : capacity;
seg = ikcp_segment_new(kcp, old->len + extend);
assert(seg);
if (seg == NULL) {
return -2;
}
iqueue_add_tail(&seg->node, &kcp->snd_queue);
memcpy(seg->data, old->data, old->len);
if (buffer) {
memcpy(seg->data + old->len, buffer, extend);
buffer += extend;
}
seg->len = old->len + extend;
seg->frg = 0;
len -= extend;
iqueue_del_init(&old->node);
ikcp_segment_delete(kcp, old);
}
}
if (len <= 0) {
return 0;
}
}
if (len <= (int)kcp->mss) count = 1;
else count = (len + kcp->mss - 1) / kcp->mss;