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Problem: loop sending signaler event is obscure

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Solution: add comments and remove continue/break
This commit is contained in:
Simon Giesecke 2019-12-10 16:19:25 +01:00
parent 3ace237988
commit 9f16513ebe
1 changed files with 8 additions and 9 deletions
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15
src/signaler.cpp
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@ -183,16 +183,15 @@ void zmq::signaler_t::send ()
ssize_t sz = write (_w, &inc, sizeof (inc)); ssize_t sz = write (_w, &inc, sizeof (inc));
errno_assert (sz == sizeof (inc)); errno_assert (sz == sizeof (inc));
#elif defined ZMQ_HAVE_WINDOWS #elif defined ZMQ_HAVE_WINDOWS
unsigned char dummy = 0; const char dummy = 0;
while (true) { int nbytes;
int nbytes = do {
::send (_w, reinterpret_cast<char *> (&dummy), sizeof (dummy), 0); nbytes = ::send (_w, &dummy, sizeof (dummy), 0);
wsa_assert (nbytes != SOCKET_ERROR); wsa_assert (nbytes != SOCKET_ERROR);
if (unlikely (nbytes == SOCKET_ERROR)) // wsa_assert does not abort on WSAEWOULDBLOCK. If we get this, we retry.
continue; } while (nbytes == SOCKET_ERROR);
// Given the small size of dummy (should be 1) expect that send was able to send everything.
zmq_assert (nbytes == sizeof (dummy)); zmq_assert (nbytes == sizeof (dummy));
break;
}
#elif defined ZMQ_HAVE_VXWORKS #elif defined ZMQ_HAVE_VXWORKS
unsigned char dummy = 0; unsigned char dummy = 0;
while (true) { while (true) {