summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/encoder.hpp14
1 files changed, 10 insertions, 4 deletions
diff --git a/src/encoder.hpp b/src/encoder.hpp
index 6387c4e..c41180f 100644
--- a/src/encoder.hpp
+++ b/src/encoder.hpp
@@ -56,12 +56,18 @@ namespace zmq
// If we are able to fill whole buffer in a single go, let's
// use zero-copy. There's no disadvantage to it as we cannot
- // stuck multiple messages into the buffer anyway.
+ // stuck multiple messages into the buffer anyway. Note that
+ // subsequent write(s) are non-blocking, thus each single
+ // write writes at most SO_SNDBUF bytes at once not depending
+ // on how large is the chunk returned from here.
+ // As a consequence, large messages being sent won't block
+ // other engines running in the same I/O thread for excessive
+ // amounts of time.
if (pos == 0 && to_write >= *size_) {
*data_ = write_pos;
- write_pos += *size_;
- to_write -= *size_;
- pos = *size_;
+ write_pos += to_write;
+ pos = to_write;
+ to_write = 0;
break;
}