495694da29
When the tempo is changed, the times on all active timers must be adjusted to match the new timing values. Add an API to do this and invoke it when a tempo change meta event is read.
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
//
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// Copyright(C) 2005-2014 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (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 General Public License for more details.
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//
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// DESCRIPTION:
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// OPL OpenBSD interface (also NetBSD)
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//
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#include "config.h"
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// OpenBSD has a i386_iopl on i386 and amd64_iopl on x86_64,
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// even though they do the same thing. Take care of this
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// here, and map set_iopl to point to the appropriate name.
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#if defined(HAVE_LIBI386)
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#include <sys/types.h>
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#include <machine/sysarch.h>
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#include <i386/pio.h>
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#define set_iopl i386_iopl
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#elif defined(HAVE_LIBAMD64)
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#include <sys/types.h>
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#include <machine/sysarch.h>
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#include <amd64/pio.h>
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#define set_iopl amd64_iopl
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#else
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#define NO_OBSD_DRIVER
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#endif
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// If the above succeeded, proceed with the rest.
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#ifndef NO_OBSD_DRIVER
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include "opl.h"
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#include "opl_internal.h"
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#include "opl_timer.h"
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static unsigned int opl_port_base;
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static int OPL_OpenBSD_Init(unsigned int port_base)
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{
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// Try to get permissions:
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if (set_iopl(3) < 0)
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{
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fprintf(stderr, "Failed to get raise I/O privilege level: "
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"check that you are running as root.\n");
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return 0;
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}
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opl_port_base = port_base;
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// Start callback thread
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if (!OPL_Timer_StartThread())
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{
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set_iopl(0);
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return 0;
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}
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return 1;
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}
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static void OPL_OpenBSD_Shutdown(void)
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{
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// Stop callback thread
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OPL_Timer_StopThread();
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// Release I/O port permissions:
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set_iopl(0);
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}
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static unsigned int OPL_OpenBSD_PortRead(opl_port_t port)
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{
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return inb(opl_port_base + port);
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}
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static void OPL_OpenBSD_PortWrite(opl_port_t port, unsigned int value)
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{
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outb(opl_port_base + port, value);
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}
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opl_driver_t opl_openbsd_driver =
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{
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"OpenBSD",
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OPL_OpenBSD_Init,
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OPL_OpenBSD_Shutdown,
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OPL_OpenBSD_PortRead,
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OPL_OpenBSD_PortWrite,
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OPL_Timer_SetCallback,
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OPL_Timer_ClearCallbacks,
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OPL_Timer_Lock,
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OPL_Timer_Unlock,
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OPL_Timer_SetPaused,
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OPL_Timer_AdjustCallbacks,
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};
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#endif /* #ifndef NO_OBSD_DRIVER */
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