diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mailbox.cpp | 71 | ||||
| -rw-r--r-- | src/mailbox.hpp | 12 |
2 files changed, 23 insertions, 60 deletions
diff --git a/src/mailbox.cpp b/src/mailbox.cpp index 78455a4..33bc20c 100644 --- a/src/mailbox.cpp +++ b/src/mailbox.cpp @@ -79,7 +79,8 @@ zmq::fd_t zmq::mailbox_t::get_fd () #if defined ZMQ_HAVE_WINDOWS -zmq::mailbox_t::mailbox_t () +zmq::mailbox_t::mailbox_t () : + blocking (true) { // Create the socketpair for signalling. int rc = make_socketpair (&r, &w); @@ -89,11 +90,6 @@ zmq::mailbox_t::mailbox_t () unsigned long argp = 1; rc = ioctlsocket (w, FIONBIO, &argp); wsa_assert (rc != SOCKET_ERROR); - - // Set the reader to non-blocking mode. - argp = 1; - rc = ioctlsocket (r, FIONBIO, &argp); - wsa_assert (rc != SOCKET_ERROR); } zmq::mailbox_t::~mailbox_t () @@ -121,33 +117,18 @@ int zmq::mailbox_t::recv (command_t *cmd_, int timeout_) if (timeout_ > 0) return recv_timeout (cmd_, timeout_); - // If required, set the reader to blocking mode. - if (timeout_ < 0) { - unsigned long argp = 0; + // If required, switch the reader to blocking or non-blocking mode. + if ((timeout_ < 0 && !blocking) || (timeout_ == 0 && blocking)) { + blocking = (timeout_ < 0); + unsigned long argp = blocking ? 0 : 1; int rc = ioctlsocket (r, FIONBIO, &argp); wsa_assert (rc != SOCKET_ERROR); } - // Attempt to read an entire command. Returns EAGAIN if non-blocking - // and a command is not available. Save value of errno if we wish to pass - // it to caller. - int err = 0; + // Attempt to read an entire command. int nbytes = ::recv (r, (char*) cmd_, sizeof (command_t), 0); if (nbytes == -1 && WSAGetLastError () == WSAEWOULDBLOCK) - err = EAGAIN; - - // Re-set the reader to non-blocking mode. - if (timeout_ < 0) { - unsigned long argp = 1; - int rc = ioctlsocket (r, FIONBIO, &argp); - wsa_assert (rc != SOCKET_ERROR); - } - - // If the recv failed, return with the saved errno. - if (err != 0) { - errno = err; return -1; - } // Sanity check for success. wsa_assert (nbytes != SOCKET_ERROR); @@ -160,7 +141,8 @@ int zmq::mailbox_t::recv (command_t *cmd_, int timeout_) #else -zmq::mailbox_t::mailbox_t () +zmq::mailbox_t::mailbox_t () : + blocking (true) { #ifdef PIPE_BUF // Make sure that command can be written to the socket in atomic fashion. @@ -178,14 +160,6 @@ zmq::mailbox_t::mailbox_t () errno_assert (flags >= 0); rc = fcntl (w, F_SETFL, flags | O_NONBLOCK); errno_assert (rc == 0); - -#ifndef MSG_DONTWAIT - // Set the reader to non-blocking mode. - flags = fcntl (r, F_GETFL, 0); - errno_assert (flags >= 0); - rc = fcntl (r, F_SETFL, flags | O_NONBLOCK); - errno_assert (rc == 0); -#endif } zmq::mailbox_t::~mailbox_t () @@ -250,35 +224,20 @@ int zmq::mailbox_t::recv (command_t *cmd_, int timeout_) return -1; #else - // If required, set the reader to blocking mode. - if (timeout_ < 0) { + // If required, switch the reader to blocking or non-blocking mode. + if ((timeout_ < 0 && !blocking) || (timeout_ == 0 && blocking)) { + blocking = (timeout_ < 0); int flags = fcntl (r, F_GETFL, 0); errno_assert (flags >= 0); - int rc = fcntl (r, F_SETFL, flags & ~O_NONBLOCK); + int rc = fcntl (r, F_SETFL, + blocking ? flags | O_NONBLOCK : flags & ~O_NONBLOCK); errno_assert (rc == 0); } - // Attempt to read an entire command. Returns EAGAIN if non-blocking - // and a command is not available. Save value of errno if we wish to pass - // it to caller. - int err = 0; + // Attempt to read an entire command. ssize_t nbytes = ::recv (r, cmd_, sizeof (command_t), 0); if (nbytes == -1 && (errno == EAGAIN || errno == EINTR)) - err = errno; - - // Re-set the reader to non-blocking mode. - if (timeout_ < 0) { - int flags = fcntl (r, F_GETFL, 0); - errno_assert (flags >= 0); - int rc = fcntl (r, F_SETFL, flags | O_NONBLOCK); - errno_assert (rc == 0); - } - - // If the recv failed, return with the saved errno if set. - if (err != 0) { - errno = err; return -1; - } #endif diff --git a/src/mailbox.hpp b/src/mailbox.hpp index 1b54aac..eb02e39 100644 --- a/src/mailbox.hpp +++ b/src/mailbox.hpp @@ -45,10 +45,6 @@ namespace zmq private: - // Write & read end of the socketpair. - fd_t w; - fd_t r; - // Platform-dependent function to create a socketpair. static int make_socketpair (fd_t *r_, fd_t *w_); @@ -57,6 +53,14 @@ namespace zmq // blocking recvs. int recv_timeout (command_t *cmd_, int timeout_); + // Write & read end of the socketpair. + fd_t w; + fd_t r; + + // Used on platforms where there's no MSG_DONTWAIT functionality. + // True if the read socket is set to the blocking state. + bool blocking; + // Disable copying of mailbox_t object. mailbox_t (const mailbox_t&); const mailbox_t &operator = (const mailbox_t&); |