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authorMartin Sustrik <sustrik@250bpm.com>2010-04-29 17:31:57 +0200
committerMartin Sustrik <sustrik@250bpm.com>2010-04-29 17:31:57 +0200
commit37128b7b1aeed9ad2bf6816560b85b5f94dd5bec (patch)
tree41c1147b83feccf5f495f004e3b48952b8756271 /src/signaler.hpp
parentc193fd146661b39027c5e3fa0776dcdf8c6af5e2 (diff)
fd_signaler_t renamed to signaler_t
Diffstat (limited to 'src/signaler.hpp')
-rw-r--r--src/signaler.hpp80
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+/*
+ Copyright (c) 2007-2010 iMatix Corporation
+
+ This file is part of 0MQ.
+
+ 0MQ is free software; you can redistribute it and/or modify it under
+ the terms of the Lesser GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ 0MQ is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ Lesser GNU General Public License for more details.
+
+ You should have received a copy of the Lesser GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_SIGNALER_HPP_INCLUDED__
+#define __ZMQ_SIGNALER_HPP_INCLUDED__
+
+#include "platform.hpp"
+#include "fd.hpp"
+#include "stdint.hpp"
+
+namespace zmq
+{
+
+ // This object can be used to send individual signals from one thread to
+ // another. The specific of this pipe is that it has associated file
+ // descriptor and so it can be polled on. Same signal cannot be sent twice
+ // unless signals are retrieved by the reader side in the meantime.
+
+ class signaler_t
+ {
+ public:
+
+ signaler_t ();
+ ~signaler_t ();
+
+ // i_signaler interface implementation.
+ void signal (int signal_);
+ uint64_t poll ();
+ uint64_t check ();
+ fd_t get_fd ();
+
+ private:
+
+#if defined ZMQ_HAVE_OPENVMS
+
+ // Whilst OpenVMS supports socketpair - it maps to AF_INET only.
+ // Further, it does not set the socket options TCP_NODELAY and
+ // TCP_NODELACK which can lead to performance problems. We'll
+ // overload the socketpair function for this class.
+ //
+ // The bug will be fixed in V5.6 ECO4 and beyond. In the
+ // meantime, we'll create the socket pair manually.
+ static int socketpair (int domain_, int type_, int protocol_,
+ int sv_ [2]);
+
+#endif
+
+#if defined ZMQ_HAVE_EVENTFD
+ // Eventfd descriptor.
+ fd_t fd;
+#else
+ // Write & read end of the socketpair.
+ fd_t w;
+ fd_t r;
+#endif
+
+ // Disable copying of fd_signeler object.
+ signaler_t (const signaler_t&);
+ void operator = (const signaler_t&);
+ };
+
+}
+
+#endif