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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1703 fefdeb5f-60dc-0310-8127-8f9354f1896f
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
#ifndef foopulsertpollhfoo
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#define foopulsertpollhfoo
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/* $Id$ */
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <poll.h>
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#include <sys/types.h>
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#include <pulse/sample.h>
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#include <pulsecore/asyncmsgq.h>
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#include <pulsecore/fdsem.h>
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/* An implementation of a "real-time" poll loop. Basically, this is
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* yet another wrapper around poll(). However it has certain
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* advantages over pa_mainloop and suchlike:
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*
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* 1) It uses timer_create() and POSIX real time signals to guarantee
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* optimal high-resolution timing. Starting with Linux 2.6.21 hrtimers
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* are available, and since right now only nanosleep() and the POSIX
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* clock and timer interfaces have been ported to hrtimers (and not
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* ppoll/pselect!) we have to combine ppoll() with timer_create(). The
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* fact that POSIX timers and POSIX rt signals are used internally is
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* completely hidden.
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*
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* 2) It allows raw access to the pollfd data to users
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*
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* 3) It allows arbitrary functions to be run before entering the
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* actual poll() and after it.
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*
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* Only a single interval timer is supported..*/
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typedef struct pa_rtpoll pa_rtpoll;
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typedef struct pa_rtpoll_item pa_rtpoll_item;
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pa_rtpoll *pa_rtpoll_new(void);
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void pa_rtpoll_free(pa_rtpoll *p);
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void pa_rtpoll_install(pa_rtpoll *p);
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int pa_rtpoll_run(pa_rtpoll *f);
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void pa_rtpoll_set_timer_absolute(pa_rtpoll *p, const struct timespec *ts);
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void pa_rtpoll_set_timer_periodic(pa_rtpoll *p, pa_usec_t usec);
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void pa_rtpoll_set_timer_relative(pa_rtpoll *p, pa_usec_t usec);
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void pa_rtpoll_set_timer_disabled(pa_rtpoll *p);
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pa_rtpoll_item *pa_rtpoll_item_new(pa_rtpoll *p, unsigned n_fds);
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void pa_rtpoll_item_free(pa_rtpoll_item *i);
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/* Please note that this pointer might change on every call and when
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* pa_rtpoll_run() is called. Hence: call this immediately before
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* using the pointer and don't save the result anywhere */
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struct pollfd *pa_rtpoll_item_get_pollfd(pa_rtpoll_item *i, unsigned *n_fds);
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void pa_rtpoll_item_set_before_callback(pa_rtpoll_item *i, int (*before_cb)(pa_rtpoll_item *i));
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void pa_rtpoll_item_set_after_callback(pa_rtpoll_item *i, void (*after_cb)(pa_rtpoll_item *i));
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void pa_rtpoll_item_set_userdata(pa_rtpoll_item *i, void *userdata);
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void* pa_rtpoll_item_get_userdata(pa_rtpoll_item *i);
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pa_rtpoll_item *pa_rtpoll_item_new_fdsem(pa_rtpoll *p, pa_fdsem *s);
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pa_rtpoll_item *pa_rtpoll_item_new_asyncmsgq(pa_rtpoll *p, pa_asyncmsgq *q);
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#endif
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