godot/thirdparty/libwebsockets/lib/plat/unix/unix-pipe.c

/*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010-2018 Andy Green <[email protected]>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation:
 *  version 2.1 of the License.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 *  MA  02110-1301  USA
 */

#define _GNU_SOURCE
#include "core/private.h"


int
lws_plat_pipe_create(struct lws *wsi)
{
	struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];

#if defined(LWS_HAVE_PIPE2)
	return pipe2(pt->dummy_pipe_fds, O_NONBLOCK);
#else
	return pipe(pt->dummy_pipe_fds);
#endif
}

int
lws_plat_pipe_signal(struct lws *wsi)
{
	struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
	char buf = 0;
	int n;

	n = write(pt->dummy_pipe_fds[1], &buf, 1);

	return n != 1;
}

void
lws_plat_pipe_close(struct lws *wsi)
{
	struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];

	if (pt->dummy_pipe_fds[0] && pt->dummy_pipe_fds[0] != -1)
		close(pt->dummy_pipe_fds[0]);
	if (pt->dummy_pipe_fds[1] && pt->dummy_pipe_fds[1] != -1)
		close(pt->dummy_pipe_fds[1]);

	pt->dummy_pipe_fds[0] = pt->dummy_pipe_fds[1] = -1;
}