55e0969cef
midi specific: - add reference counting for midi operations, and ensure that detach waits for other threads to complete before tearing down the device completely. - in detach, halt midi callouts before destroying them - re-check sc->dying after sleeping in midiread() - in real_writebytes(), make sure we're open and not dying - make sure we drop the interrupt lock before calling any code that may want to check thread locks. this is now safe due to the above changes. sequencer specific: - avoid caching the midi softc in the sequencer softc. instead, every time we want to use it, look it up again and make sure it still exists. this fixes various crashes i've seen in the usb midi code when detaching the umidi while it is active.
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/* $NetBSD: sequencervar.h,v 1.17 2014/12/22 07:02:22 mrg Exp $ */
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/*
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* Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Lennart Augustsson (augustss@NetBSD.org).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/callout.h>
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#include <sys/vnode.h>
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struct midi_softc;
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struct syn_timer {
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struct timeval reftime, stoptime;
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uint16_t tempo_beatpermin, timebase_divperbeat;
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uint32_t usperdiv;
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uint32_t divs_lastevent;
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uint32_t divs_lastchange;
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int running;
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};
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#define SEQ_MAXQ 256
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struct sequencer_queue {
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seq_event_t buf[SEQ_MAXQ];
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u_int in; /* input index in buf */
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u_int out; /* output index in buf */
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u_int count; /* filled slots in buf */
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};
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#define SEQ_QINIT(q) ((q)->in = (q)->out = (q)->count = 0)
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#define SEQ_QEMPTY(q) ((q)->count == 0)
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#define SEQ_QFULL(q) ((q)->count >= SEQ_MAXQ)
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#define SEQ_QPUT(q, e) ((q)->buf[(q)->in++] = (e), (q)->in %= SEQ_MAXQ, (q)->count++)
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#define SEQ_QGET(q, e) ((e) = (q)->buf[(q)->out++], (q)->out %= SEQ_MAXQ, (q)->count--)
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#define SEQ_QLEN(q) ((q)->count)
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struct sequencer_softc;
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#define MAXCHAN 16
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struct midi_dev {
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const char *name;
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int subtype;
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int capabilities;
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int nr_voices;
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int instr_bank_size;
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int unit;
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struct sequencer_softc *seq;
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char doingsysex; /* doing a SEQ_SYSEX */
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vnode_t *vp;
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};
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struct sequencer_softc {
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callout_t sc_callout;
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kmutex_t lock;
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kcondvar_t wchan;
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kcondvar_t rchan;
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kcondvar_t lchan;
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int dvlock;
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int dying;
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u_int isopen; /* Open indicator */
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int flags; /* Open flags */
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int mode;
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#define SEQ_OLD 0
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#define SEQ_NEW 1
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int pbus;
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struct selinfo wsel; /* write selector */
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struct selinfo rsel; /* read selector */
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pid_t async; /* process who wants audio SIGIO */
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void *sih;
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pcq_t *pcq;
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int nmidi; /* number of MIDI devices */
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int ndevs;
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struct midi_dev **devs;
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struct syn_timer timer;
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struct sequencer_queue outq; /* output event queue */
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u_int lowat; /* output queue low water mark */
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char timeout; /* timeout has been set */
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struct sequencer_queue inq; /* input event queue */
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u_long input_stamp;
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int sc_unit;
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LIST_ENTRY(sequencer_softc) sc_link;
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};
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void seq_event_intr(void *, seq_event_t *);
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#define SEQUENCERUNIT(d) ((d) & 0x7f)
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#define SEQ_IS_OLD(d) ((d) & 0x80)
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