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Use freeze operations to prevent shenanegans on bufferevent pair evbuffers.

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svn:r1167
This commit is contained in:
Nick Mathewson 2009-04-13 03:07:17 +00:00
parent 0e32ba54dc
commit 8dec59bb35
1 changed files with 12 additions and 1 deletions
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13
bufferevent_pair.c
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@ -128,6 +128,11 @@ bufferevent_pair_new(struct event_base *base, enum bufferevent_options options,
bufev1->partner = bufev2;
bufev2->partner = bufev1;
evbuffer_freeze(bufev1->bev.input, 0);
evbuffer_freeze(bufev1->bev.output, 1);
evbuffer_freeze(bufev2->bev.input, 0);
evbuffer_freeze(bufev2->bev.output, 1);
pair[0] = downcast(bufev1);
pair[1] = downcast(bufev2);
@ -141,6 +146,9 @@ be_pair_transfer(struct bufferevent *src, struct bufferevent *dst,
size_t src_size, dst_size;
size_t n;
evbuffer_unfreeze(src->output, 1);
evbuffer_unfreeze(dst->input, 0);
if (dst->wm_read.high) {
size_t dst_size = evbuffer_get_length(dst->input);
if (dst_size < dst->wm_read.high) {
@ -148,7 +156,7 @@ be_pair_transfer(struct bufferevent *src, struct bufferevent *dst,
evbuffer_remove_buffer(src->output, dst->input, n);
} else {
if (!ignore_wm)
return;
goto done;
evbuffer_add_buffer(dst->input, src->output);
}
} else {
@ -166,6 +174,9 @@ be_pair_transfer(struct bufferevent *src, struct bufferevent *dst,
event_deferred_cb_schedule(src->ev_base,
&(upcast(src)->deferred_write_cb));
}
done:
evbuffer_freeze(src->output, 1);
evbuffer_freeze(dst->input, 0);
}
static inline int