//
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// Copyright 2019 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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//
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// This software is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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#ifndef PLATFORM_POSIX_POLLQ_H
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#define PLATFORM_POSIX_POLLQ_H
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#ifdef NNG_PLATFORM_POSIX
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// This file defines structures we will use for emulating asynchronous I/O
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// on POSIX. POSIX lacks the support for callback based asynchronous I/O
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// that we have on Windows, although it has a non-widely support aio layer
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// that is not very performant on many systems. So we emulate this using
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// one of several possible different backends.
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#include "core/nng_impl.h"
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#include <poll.h>
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typedef struct nni_posix_pfd nni_posix_pfd;
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typedef void (*nni_posix_pfd_cb)(nni_posix_pfd *, unsigned, void *);
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extern int nni_posix_pfd_init(nni_posix_pfd **, int);
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extern void nni_posix_pfd_fini(nni_posix_pfd *);
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extern int nni_posix_pfd_arm(nni_posix_pfd *, unsigned);
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extern int nni_posix_pfd_fd(nni_posix_pfd *);
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extern void nni_posix_pfd_close(nni_posix_pfd *);
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extern void nni_posix_pfd_set_cb(nni_posix_pfd *, nni_posix_pfd_cb, void *);
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#define NNI_POLL_IN ((unsigned) POLLIN)
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#define NNI_POLL_OUT ((unsigned) POLLOUT)
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#define NNI_POLL_HUP ((unsigned) POLLHUP)
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#define NNI_POLL_ERR ((unsigned) POLLERR)
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#define NNI_POLL_INVAL ((unsigned) POLLNVAL)
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#endif // NNG_PLATFORM_POSIX
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#endif // PLATFORM_POSIX_POLLQ_H
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