mirror of https://code.videolan.org/videolan/vlc
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*****************************************************************************
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* vlc_poll.h : poll implementation for the VideoLAN client
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*****************************************************************************
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* Copyright (C) 1999, 2002 VLC authors and VideoLAN
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* Copyright © 2007-2016 Rémi Denis-Courmont
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*
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* Authors: Jean-Marc Dressler <polux@via.ecp.fr>
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* Samuel Hocevar <sam@via.ecp.fr>
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* Gildas Bazin <gbazin@netcourrier.com>
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* Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_POLL_H_
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#define VLC_POLL_H_
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#include <vlc_threads.h>
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/**
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* \ingroup os
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* \defgroup thread_poll Poll implementations
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* @{
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* \file
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* Poll implementations
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*/
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#if defined (_WIN32)
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static inline int vlc_poll(struct pollfd *fds, unsigned nfds, int timeout)
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{
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int val;
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vlc_testcancel();
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val = poll(fds, nfds, timeout);
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if (val < 0)
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vlc_testcancel();
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return val;
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}
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# define poll(u,n,t) vlc_poll(u, n, t)
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#elif defined (__OS2__)
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static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
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{
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static int (*vlc_poll_os2)(struct pollfd *, unsigned, int) = NULL;
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if (!vlc_poll_os2)
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{
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HMODULE hmod;
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CHAR szFailed[CCHMAXPATH];
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if (DosLoadModule(szFailed, sizeof(szFailed), "vlccore", &hmod))
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return -1;
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if (DosQueryProcAddr(hmod, 0, "_vlc_poll_os2", (PFN *)&vlc_poll_os2))
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return -1;
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}
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return (*vlc_poll_os2)(fds, nfds, timeout);
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}
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# define poll(u,n,t) vlc_poll(u, n, t)
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#elif defined (__ANDROID__) /* pthreads subset without pthread_cancel() */
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static inline int vlc_poll (struct pollfd *fds, unsigned nfds, int timeout)
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{
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int val;
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do
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{
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int ugly_timeout = ((unsigned)timeout >= 50) ? 50 : timeout;
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if (timeout >= 0)
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timeout -= ugly_timeout;
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vlc_testcancel ();
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val = poll (fds, nfds, ugly_timeout);
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}
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while (val == 0 && timeout != 0);
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return val;
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}
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# define poll(u,n,t) vlc_poll(u, n, t)
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#else /* POSIX threads */
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#endif
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/** @} */
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#endif /* !VLC_POLL_H_ */
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