dmxsigio.c File Reference

#include "inputstr.h"
#include "dmxinputinit.h"
#include "dmxsigio.h"
#include "dmxevents.h"
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>

Defines
#define	O_ASYNC 0
#define	O_NONBLOCK FNONBLK
Functions
static void	dmxSigioHandler (int sig)
void	dmxSigioBlock (void)
void	dmxSigioUnblock (void)
static void	dmxSigioHook (void)
static void	dmxSigioUnhook (void)
static void	dmxSigioAdd (DMXInputInfo *dmxInput)
static void	dmxSigioRemove (DMXInputInfo *dmxInput)
void	dmxSigioEnableInput (void)
void	dmxSigioDisableInput (void)
void	dmxSigioRegister (DMXInputInfo *dmxInput, int fd)
void	dmxSigioUnregister (DMXInputInfo *dmxInput)
Variables
static int	dmxFdCount = 0
static Bool	dmxInputEnabled = TRUE

Detailed Description

Provides an interface for handling SIGIO signals for input devices.

Define Documentation

#define O_ASYNC 0

Referenced by dmxSigioAdd(), and dmxSigioRemove().

#define O_NONBLOCK FNONBLK

Referenced by dmxSigioAdd(), dmxSigioRemove(), kbdLinuxOpenVT(), msLinuxInit(), ps2LinuxInit(), and usbInit().

Function Documentation

static void dmxSigioAdd ( DMXInputInfo * dmxInput ) [static]

References DMX_ACTIVESIGIO, DMX_NOSIGIO, DMX_USESIGIO, dmxFdCount, dmxSigioHook(), O_ASYNC, O_NONBLOCK, _DMXInputInfo::sigioAdded, _DMXInputInfo::sigioFd, _DMXInputInfo::sigioFdCount, and _DMXInputInfo::sigioState.

Referenced by dmxSigioEnableInput(), and dmxSigioRegister().

void dmxSigioBlock ( void )

Block SIGIO handling.

Referenced by dmxCoreMotion(), dmxExtMotion(), and dmxTranslateAndEnqueueExtEvent().

void dmxSigioDisableInput ( void )

Disable SIGIO handling. This removes the hanlder from the OS.

References dmxInputEnabled, dmxInputs, dmxNumInputs, and dmxSigioRemove().

Referenced by dmxWakeupHandler().

void dmxSigioEnableInput ( void )

Enable SIGIO handling. This instantiates the handler with the OS.

References dmxInputEnabled, dmxInputs, dmxNumInputs, and dmxSigioAdd().

Referenced by dmxSwitchReturn().

static void dmxSigioHandler ( int sig ) [static]

References _DMXLocalInputInfo::collect_events, _DMXInputInfo::devs, DMX_ACTIVESIGIO, DMX_NO_BLOCK, dmxCheckSpecialKeys(), dmxEnqueue(), dmxInputs, dmxMotion(), dmxNumInputs, _DMXInputInfo::numDevs, _DMXLocalInputInfo::pDevice, and _DMXInputInfo::sigioState.

Referenced by dmxSigioHook().

static void dmxSigioHook ( void ) [static]

References dmxSigioHandler().

Referenced by dmxSigioAdd().

void dmxSigioRegister	(	DMXInputInfo *	dmxInput,
		int	fd
	)

Make a note that the input device described in dmxInput will be using the file descriptor fd for SIGIO signals. Calls AddEnabledDevice ifi SIGIO handling has been enabled with dmxSigioEnableInput().

References DMX_MAX_SIGIO_FDS, DMX_USESIGIO, dmxFatal, dmxInputEnabled, dmxLog(), dmxSigioAdd(), _DMXInputInfo::sigioFd, _DMXInputInfo::sigioFdCount, and _DMXInputInfo::sigioState.

Referenced by dmxDeviceOnOff().

static void dmxSigioRemove ( DMXInputInfo * dmxInput ) [static]

References DMX_ACTIVESIGIO, DMX_NOSIGIO, DMX_USESIGIO, dmxFdCount, dmxSigioUnhook(), O_ASYNC, O_NONBLOCK, _DMXInputInfo::sigioAdded, _DMXInputInfo::sigioFd, _DMXInputInfo::sigioFdCount, and _DMXInputInfo::sigioState.