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