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58 lines
2.3 KiB
58 lines
2.3 KiB
/*
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Copyright (c) 2012-2013 Martin Sustrik All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#ifndef NN_EXCL_INCLUDED
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#define NN_EXCL_INCLUDED
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#include "../../protocol.h"
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#include <stddef.h>
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/* This is an object to handle a single pipe. To be used by socket types that
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can work with precisely one connection, e.g. PAIR. */
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struct nn_excl {
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/* The pipe being used at the moment. All other pipes will be rejected
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until this one terminates. NULL if there is no connected pipe. */
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struct nn_pipe *pipe;
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/* Pipe ready for receiving. It's either equal to 'pipe' or NULL. */
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struct nn_pipe *inpipe;
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/* Pipe ready for sending. It's either equal to 'pipe' or NULL. */
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struct nn_pipe *outpipe;
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};
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void nn_excl_init (struct nn_excl *self);
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void nn_excl_term (struct nn_excl *self);
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int nn_excl_add (struct nn_excl *self, struct nn_pipe *pipe);
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void nn_excl_rm (struct nn_excl *self, struct nn_pipe *pipe);
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void nn_excl_in (struct nn_excl *self, struct nn_pipe *pipe);
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void nn_excl_out (struct nn_excl *self, struct nn_pipe *pipe);
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int nn_excl_send (struct nn_excl *self, struct nn_msg *msg);
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int nn_excl_recv (struct nn_excl *self, struct nn_msg *msg);
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int nn_excl_can_send (struct nn_excl *self);
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int nn_excl_can_recv (struct nn_excl *self);
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#endif
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