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97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
/* libuEv - Micro event loop library
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*
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* Copyright (c) 2012 Flemming Madsen <flemming!madsen()madsensoft!dk>
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* Copyright (c) 2013-2016 Joachim Nilsson <troglobit()gmail!com>
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*
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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"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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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 THE
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* 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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <errno.h>
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#include "uev.h"
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/**
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* Create an I/O watcher
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* @param ctx A valid libuEv context
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* @param w Pointer to an uev_t watcher
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* @param cb I/O callback
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* @param arg Optional callback argument
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* @param fd File descriptor to watch, or -1 to register an empty watcher
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* @param events Requested events to watch for, a mask of %UEV_READ, %UEV_WRITE and %UEV_PRI
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*
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* @return POSIX OK(0) or non-zero with @param errno set on error.
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*/
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int uev_io_init(uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, int fd, int events)
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{
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if (fd < 0) {
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errno = EINVAL;
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return -1;
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}
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if (uev_watcher_init(ctx, w, UEV_IO_TYPE, cb, arg, fd, events))
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return -1;
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return uev_watcher_start(w);
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}
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/**
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* Reset an I/O watcher
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* @param w Pointer to an uev_t watcher
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* @param fd New file descriptor to monitor
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* @param events Requested events to watch for, a mask of %UEV_READ and %UEV_WRITE
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*
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* @return POSIX OK(0) or non-zero with @param errno set on error.
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*/
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int uev_io_set(uev_t *w, int fd, int events)
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{
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/* Ignore any errors, only to clean up anything lingering ... */
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uev_io_stop(w);
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return uev_io_init(w->ctx, w, (uev_cb_t *)w->cb, w->arg, fd, events);
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}
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/**
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* Start an I/O watcher
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* @param w Watcher to start (again)
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*
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* @return POSIX OK(0) or non-zero with @param errno set on error.
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*/
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int uev_io_start(uev_t *w)
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{
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return uev_io_set(w, w->fd, w->events);
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}
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/**
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* Stop an I/O watcher
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* @param w Watcher to stop
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*
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* @return POSIX OK(0) or non-zero with @param errno set on error.
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*/
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int uev_io_stop(uev_t *w)
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{
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return uev_watcher_stop(w);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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