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Onek8
2025-01-22 17:22:38 +01:00
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103
Kinc/Sources/kinc/libs/plat/unix/unix-pipe.c Normal file
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/*
* libwebsockets - small server side websockets and web server implementation
*
* Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
*
* 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.
*/
#if !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#include "private-lib-core.h"
int
lws_plat_pipe_create(struct lws *wsi)
{
struct lws_context_per_thread *pt = &wsi->a.context->pt[(int)wsi->tsi];
int n;
#if defined(LWS_HAVE_EVENTFD)
pt->dummy_pipe_fds[0] = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
pt->dummy_pipe_fds[1] = -1;
n = pt->dummy_pipe_fds[0] < 0 ? -1 : 0;
goto set;
#elif defined(LWS_HAVE_PIPE2)
n = pipe2(pt->dummy_pipe_fds, O_NONBLOCK);
#else
n = pipe(pt->dummy_pipe_fds);
#endif
#if defined(LWS_HAVE_EVENTFD)
set:
#endif
if (n >= 0) {
if (fcntl(pt->dummy_pipe_fds[0], F_SETFL, O_NONBLOCK) < 0)
n = -1;
else if (pt->dummy_pipe_fds[1] >= 0) {
if (fcntl(pt->dummy_pipe_fds[1], F_SETFL, O_NONBLOCK) < 0)
n = -1;
}
}
return n;
}
int
lws_plat_pipe_signal(struct lws_context *ctx, int tsi)
{
struct lws_context_per_thread *pt = &ctx->pt[tsi];
#if defined(LWS_HAVE_EVENTFD)
eventfd_t value = 1;
return eventfd_write(pt->dummy_pipe_fds[0], value);
#else
char buf = 0;
int n;
n = (int)write(pt->dummy_pipe_fds[1], &buf, 1);
return n != 1;
#endif
}
void
lws_plat_pipe_close(struct lws *wsi)
{
struct lws_context_per_thread *pt = &wsi->a.context->pt[(int)wsi->tsi];
if (pt->dummy_pipe_fds[0] && pt->dummy_pipe_fds[0] != -1) {
close(pt->dummy_pipe_fds[0]);
pt->dummy_pipe_fds[0] = -1;
}
if (pt->dummy_pipe_fds[1] && pt->dummy_pipe_fds[1] != -1) {
close(pt->dummy_pipe_fds[1]);
pt->dummy_pipe_fds[1] = -1;
}
}
int
lws_plat_pipe_is_fd_assocated(struct lws_context *cx, int tsi, lws_sockfd_type fd)
{
struct lws_context_per_thread *pt = &cx->pt[tsi];
return fd == pt->dummy_pipe_fds[0] || fd == pt->dummy_pipe_fds[1];
}