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Merge pull request #514 from pijyoi/fixcs

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release critical section on failure to create signaler fdpair
This commit is contained in:
Pieter Hintjens 2013-02-15 08:44:30 -08:00
commit 08be168dd0
1 changed files with 36 additions and 10 deletions
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46
src/signaler.cpp
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@ -286,7 +286,7 @@ int zmq::signaler_t::make_fdpair (fd_t *r_, fd_t *w_)
(char *)&tcp_nodelay, sizeof (tcp_nodelay));
wsa_assert (rc != SOCKET_ERROR);
// Bind listening socket to any free local port.
// Bind listening socket to signaler port.
struct sockaddr_in addr;
memset (&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
@ -314,15 +314,19 @@ int zmq::signaler_t::make_fdpair (fd_t *r_, fd_t *w_)
// Connect writer to the listener.
rc = connect (*w_, (struct sockaddr*) &addr, sizeof (addr));
wsa_assert (rc != SOCKET_ERROR);
// Accept connection from writer.
*r_ = accept (listener, NULL, NULL);
wsa_assert (*r_ != INVALID_SOCKET);
// Save errno if connection fails
int conn_errno = 0;
if (rc == SOCKET_ERROR) {
conn_errno = WSAGetLastError ();
} else {
// Accept connection from writer.
*r_ = accept (listener, NULL, NULL);
// On Windows, preventing sockets to be inherited by child processes.
brc = SetHandleInformation ((HANDLE) *r_, HANDLE_FLAG_INHERIT, 0);
win_assert (brc);
if (*r_ == INVALID_SOCKET) {
conn_errno = WSAGetLastError ();
}
}
// We don't need the listening socket anymore. Close it.
rc = closesocket (listener);
@ -332,11 +336,33 @@ int zmq::signaler_t::make_fdpair (fd_t *r_, fd_t *w_)
brc = SetEvent (sync);
win_assert (brc != 0);
// Release the kernel object
// Release the kernel object
brc = CloseHandle (sync);
win_assert (brc != 0);
return 0;
if (*r_ != INVALID_SOCKET) {
// On Windows, preventing sockets to be inherited by child processes.
brc = SetHandleInformation ((HANDLE) *r_, HANDLE_FLAG_INHERIT, 0);
win_assert (brc);
return 0;
} else {
// Cleanup writer if connection failed
rc = closesocket (*w_);
wsa_assert (rc != SOCKET_ERROR);
*w_ = INVALID_SOCKET;
// Set errno from saved value
errno = wsa_error_to_errno (conn_errno);
// Ideally, we would return errno to the caller signaler_t()
// Unfortunately, it uses errno_assert() which gives "Unknown error"
// We might as well assert here and print the actual error message
wsa_assert_no (conn_errno);
return -1;
}
#elif defined ZMQ_HAVE_OPENVMS