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76 lines
2.3 KiB
76 lines
2.3 KiB
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.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
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell 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
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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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#if !defined(_GNU_SOURCE)
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#define _GNU_SOURCE
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#endif
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#include "private-lib-core.h"
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int
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lws_plat_pipe_create(struct lws *wsi)
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{
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struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
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#if defined(LWS_HAVE_EVENTFD)
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pt->dummy_pipe_fds[0] = eventfd(0, EFD_CLOEXEC|EFD_NONBLOCK);
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pt->dummy_pipe_fds[1] = -1;
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return pt->dummy_pipe_fds[0]<0?-1:0;
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#elif defined(LWS_HAVE_PIPE2)
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return pipe2(pt->dummy_pipe_fds, O_NONBLOCK);
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#else
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return pipe(pt->dummy_pipe_fds);
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#endif
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}
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int
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lws_plat_pipe_signal(struct lws *wsi)
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{
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struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
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#if defined(LWS_HAVE_EVENTFD)
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eventfd_t value = 1;
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return eventfd_write(pt->dummy_pipe_fds[0], value);
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#else
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char buf = 0;
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int n;
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n = write(pt->dummy_pipe_fds[1], &buf, 1);
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return n != 1;
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#endif
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}
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void
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lws_plat_pipe_close(struct lws *wsi)
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{
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struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
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if (pt->dummy_pipe_fds[0] && pt->dummy_pipe_fds[0] != -1)
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close(pt->dummy_pipe_fds[0]);
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if (pt->dummy_pipe_fds[1] && pt->dummy_pipe_fds[1] != -1)
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close(pt->dummy_pipe_fds[1]);
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pt->dummy_pipe_fds[0] = pt->dummy_pipe_fds[1] = -1;
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}
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