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Problem: zmq_fdpair function is very long

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Solution: Extract TCP/IP loopback variant into zmq_fdpair_tcpip
This commit is contained in:
Simon Giesecke 2019-12-06 17:50:30 +01:00
parent 51bf2aff35
commit 3bcaea535c
1 changed files with 34 additions and 31 deletions
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65
src/ip.cpp
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@ -316,29 +316,9 @@ static void tune_socket (const SOCKET socket_)
zmq::tcp_tune_loopback_fast_path (socket_);
}
#endif
int zmq::make_fdpair (fd_t *r_, fd_t *w_)
static int make_fdpair_tcpip (zmq::fd_t *r_, zmq::fd_t *w_)
{
#if defined ZMQ_HAVE_EVENTFD
int flags = 0;
#if defined ZMQ_HAVE_EVENTFD_CLOEXEC
// Setting this option result in sane behaviour when exec() functions
// are used. Old sockets are closed and don't block TCP ports, avoid
// leaks, etc.
flags |= EFD_CLOEXEC;
#endif
fd_t fd = eventfd (0, flags);
if (fd == -1) {
errno_assert (errno == ENFILE || errno == EMFILE);
*w_ = *r_ = -1;
return -1;
} else {
*w_ = *r_ = fd;
return 0;
}
#elif defined ZMQ_HAVE_WINDOWS
#if !defined _WIN32_WCE && !defined ZMQ_HAVE_WINDOWS_UWP
// Windows CE does not manage security attributes
SECURITY_DESCRIPTOR sd;
@ -367,7 +347,7 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
// Otherwise use Mutex implementation.
int event_signaler_port = 5905;
if (signaler_port == event_signaler_port) {
if (zmq::signaler_port == event_signaler_port) {
#if !defined _WIN32_WCE && !defined ZMQ_HAVE_WINDOWS_UWP
sync =
CreateEventW (&sa, FALSE, TRUE, L"Global\\zmq-signaler-port-sync");
@ -380,14 +360,14 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
L"Global\\zmq-signaler-port-sync");
win_assert (sync != NULL);
} else if (signaler_port != 0) {
} else if (zmq::signaler_port != 0) {
wchar_t mutex_name[MAX_PATH];
#ifdef __MINGW32__
_snwprintf (mutex_name, MAX_PATH, L"Global\\zmq-signaler-port-%d",
signaler_port);
#else
swprintf (mutex_name, MAX_PATH, L"Global\\zmq-signaler-port-%d",
signaler_port);
zmq::signaler_port);
#endif
#if !defined _WIN32_WCE && !defined ZMQ_HAVE_WINDOWS_UWP
@ -408,7 +388,7 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
// Create listening socket.
SOCKET listener;
listener = open_socket (AF_INET, SOCK_STREAM, 0);
listener = zmq::open_socket (AF_INET, SOCK_STREAM, 0);
wsa_assert (listener != INVALID_SOCKET);
// Set SO_REUSEADDR and TCP_NODELAY on listening socket.
@ -425,10 +405,10 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
memset (&addr, 0, sizeof addr);
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
addr.sin_port = htons (signaler_port);
addr.sin_port = htons (zmq::signaler_port);
// Create the writer socket.
*w_ = open_socket (AF_INET, SOCK_STREAM, 0);
*w_ = zmq::open_socket (AF_INET, SOCK_STREAM, 0);
wsa_assert (*w_ != INVALID_SOCKET);
if (sync != NULL) {
@ -441,7 +421,7 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
rc = bind (listener, reinterpret_cast<const struct sockaddr *> (&addr),
sizeof addr);
if (rc != SOCKET_ERROR && signaler_port == 0) {
if (rc != SOCKET_ERROR && zmq::signaler_port == 0) {
// Retrieve ephemeral port number
int addrlen = sizeof addr;
rc = getsockname (listener, reinterpret_cast<struct sockaddr *> (&addr),
@ -510,7 +490,7 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
if (sync != NULL) {
// Exit the critical section.
BOOL brc;
if (signaler_port == event_signaler_port)
if (zmq::signaler_port == event_signaler_port)
brc = SetEvent (sync);
else
brc = ReleaseMutex (sync);
@ -522,7 +502,7 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
}
if (*r_ != INVALID_SOCKET) {
make_socket_noninheritable (*r_);
zmq::make_socket_noninheritable (*r_);
return 0;
}
// Cleanup writer if connection failed
@ -532,10 +512,33 @@ int zmq::make_fdpair (fd_t *r_, fd_t *w_)
*w_ = INVALID_SOCKET;
}
// Set errno from saved value
errno = wsa_error_to_errno (saved_errno);
errno = zmq::wsa_error_to_errno (saved_errno);
return -1;
}
#endif
int zmq::make_fdpair (fd_t *r_, fd_t *w_)
{
#if defined ZMQ_HAVE_EVENTFD
int flags = 0;
#if defined ZMQ_HAVE_EVENTFD_CLOEXEC
// Setting this option result in sane behaviour when exec() functions
// are used. Old sockets are closed and don't block TCP ports, avoid
// leaks, etc.
flags |= EFD_CLOEXEC;
#endif
fd_t fd = eventfd (0, flags);
if (fd == -1) {
errno_assert (errno == ENFILE || errno == EMFILE);
*w_ = *r_ = -1;
return -1;
} else {
*w_ = *r_ = fd;
return 0;
}
#elif defined ZMQ_HAVE_WINDOWS
return make_fdpair_tcpip (r_, w_);
#elif defined ZMQ_HAVE_OPENVMS
// Whilst OpenVMS supports socketpair - it maps to AF_INET only. Further,