generic-library/libzmq
1
0
Fork 0
mirror of https://github.com/zeromq/libzmq.git synced 2024-12-13 18:55:10 +01:00
Code Issues Projects Releases Wiki Activity

remove all asserts during critical section

Browse Source 
the size of the critical section is reduced by only entering the critical
section right before the bind().
This commit is contained in:
KIU Shueng Chuan 2013-11-12 01:12:24 +08:00
parent cf8ba925b4
commit 7bd0b6ada1
1 changed files with 32 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
src/signaler.cpp
View File

@ -317,10 +317,6 @@ int zmq::signaler_t::make_fdpair (fd_t *r_, fd_t *w_)
win_assert (sync != NULL);
// Enter the critical section.
DWORD dwrc = WaitForSingleObject (sync, INFINITE);
zmq_assert (dwrc == WAIT_OBJECT_0);
// Windows has no 'socketpair' function. CreatePipe is no good as pipe
// handles cannot be polled on. Here we create the socketpair by hand.
*w_ = INVALID_SOCKET;
@ -341,63 +337,51 @@ 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 signaler port.
// Init sockaddr to signaler port.
struct sockaddr_in addr;
memset (&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
addr.sin_port = htons (signaler_port);
rc = bind (listener, (const struct sockaddr*) &addr, sizeof (addr));
if (rc == SOCKET_ERROR) {
int saved_errno = WSAGetLastError ();
closesocket (listener);
SetEvent (sync);
CloseHandle (sync);
// Set errno from saved value
errno = wsa_error_to_errno (saved_errno);
return -1;
}
// Listen for incomming connections.
rc = listen (listener, 1);
wsa_assert (rc != SOCKET_ERROR);
// Create the writer socket.
*w_ = WSASocket (AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
*w_ = open_socket (AF_INET, SOCK_STREAM, 0);
wsa_assert (*w_ != INVALID_SOCKET);
# if !defined _WIN32_WCE
// On Windows, preventing sockets to be inherited by child processes.
BOOL brc = SetHandleInformation ((HANDLE) *w_, HANDLE_FLAG_INHERIT, 0);
win_assert (brc);
# else
BOOL brc;
# endif
// Set TCP_NODELAY on writer socket.
rc = setsockopt (*w_, IPPROTO_TCP, TCP_NODELAY,
(char *)&tcp_nodelay, sizeof (tcp_nodelay));
wsa_assert (rc != SOCKET_ERROR);
// Enter the critical section.
DWORD dwrc = WaitForSingleObject (sync, INFINITE);
zmq_assert (dwrc == WAIT_OBJECT_0);
// Bind listening socket to signaler port.
rc = bind (listener, (const struct sockaddr*) &addr, sizeof (addr));
// Listen for incoming connections.
if (rc != SOCKET_ERROR)
rc = listen (listener, 1);
// Connect writer to the listener.
if (rc != SOCKET_ERROR)
rc = connect (*w_, (struct sockaddr*) &addr, sizeof (addr));
// Save errno if connection fails
int conn_errno = 0;
if (rc == SOCKET_ERROR)
conn_errno = WSAGetLastError ();
else {
// Accept connection from writer.
if (rc != SOCKET_ERROR)
*r_ = accept (listener, NULL, NULL);
// Save errno if error occurred in bind/listen/connect/accept.
int saved_errno = 0;
if (*r_ == INVALID_SOCKET)
conn_errno = WSAGetLastError ();
}
saved_errno = WSAGetLastError ();
// We don't need the listening socket anymore. Close it.
rc = closesocket (listener);
wsa_assert (rc != SOCKET_ERROR);
closesocket (listener);
// Exit the critical section.
brc = SetEvent (sync);
BOOL brc = SetEvent (sync);
win_assert (brc != 0);
// Release the kernel object
@ -414,11 +398,13 @@ int zmq::signaler_t::make_fdpair (fd_t *r_, fd_t *w_)
}
else {
// Cleanup writer if connection failed
if (*w_ != INVALID_SOCKET) {
rc = closesocket (*w_);
wsa_assert (rc != SOCKET_ERROR);
*w_ = INVALID_SOCKET;
}
// Set errno from saved value
errno = wsa_error_to_errno (conn_errno);
errno = wsa_error_to_errno (saved_errno);
return -1;
}