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68 lines
2.3 KiB
68 lines
2.3 KiB
9 years ago
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/*
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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_EFD_INCLUDED
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#define NN_EFD_INCLUDED
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/* Provides a way to send signals via file descriptors. The important part
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is that nn_efd_getfd() returns an actual OS-level file descriptor that
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you can poll on to wait for the event. */
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#include "../nn_config.h"
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#include "fd.h"
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#if defined NN_HAVE_WINDOWS
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#include "efd_win.h"
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#elif defined NN_HAVE_EVENTFD
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#include "efd_eventfd.h"
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#elif defined NN_HAVE_PIPE
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#include "efd_pipe.h"
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#elif defined NN_HAVE_SOCKETPAIR
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#include "efd_socketpair.h"
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#else
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#error
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#endif
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/* Initialise the efd object. */
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int nn_efd_init (struct nn_efd *self);
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/* Uninitialise the efd object. */
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void nn_efd_term (struct nn_efd *self);
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/* Get the OS file descriptor that is readable when the efd object
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is signaled. */
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nn_fd nn_efd_getfd (struct nn_efd *self);
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/* Switch the object into signaled state. */
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void nn_efd_signal (struct nn_efd *self);
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/* Switch the object into unsignaled state. */
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void nn_efd_unsignal (struct nn_efd *self);
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/* Wait till efd object becomes signaled or when timeout (in milliseconds,
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nagative value meaning 'infinite') expires. In the former case 0 is
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returened. In the latter, -ETIMEDOUT. */
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int nn_efd_wait (struct nn_efd *self, int timeout);
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#endif
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