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/*****************************************************************************
*
* NCSA DTM version 2.3
* May 1, 1992
*
* NCSA DTM Version 2.3 source code and documentation are in the public
* domain. Specifically, we give to the public domain all rights for future
* licensing of the source code, all resale rights, and all publishing rights.
*
* We ask, but do not require, that the following message be included in all
* derived works:
*
* Portions developed at the National Center for Supercomputing Applications at
* the University of Illinois at Urbana-Champaign.
*
* THE UNIVERSITY OF ILLINOIS GIVES NO WARRANTY, EXPRESSED OR IMPLIED, FOR THE
* SOFTWARE AND/OR DOCUMENTATION PROVIDED, INCLUDING, WITHOUT LIMITATION,
* WARRANTY OF MERCHANTABILITY AND WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE
*
*****************************************************************************/
#include <sys/types.h>
#if !defined(NEXT) && !defined(_ARCH_MSDOS)
#include <unistd.h>
#endif
#ifdef __hpux
#include <termio.h>
#endif
#include <fcntl.h>
#ifdef _ARCH_BSD
#include <sys/filio.h>
#endif
#ifdef _ARCH_MSDOS
# include <signal.h>
#else
# include <sys/signal.h>
#endif
#include <sys/file.h>
#include <stdio.h>
#include "dtmint.h"
#include "debug.h"
#ifdef DTM_PROTOTYPES
static void DTMsigioHandler(int sig,int code,struct sigcontext *scp,char *addr )
#else
static void DTMsigioHandler( sig, code, scp, addr )
int sig;
int code;
struct sigcontext *scp;
char *addr;
#endif
{
/*
Unfortunately, not one of the parameters listed above
provides even the slightest help in determinine WHICH
port is now ready for input, and any system calls
screw up any other system calls in progress.
*/
reg int i;
/* DBGMSG2( "DTMsigioHandler enter %X %X\n", code, addr); */
for ( i = 0 ; i < DTMptCount ; i++ ) {
int port;
int ready;
if ( !DTMpt[i] ) continue;
if ( !DTMpt[i]->callback ) continue;
port = i;
dtm_map_port_external(&port);
#if 0
if ((ready = DTMavailRead( port ))== DTMERROR) continue;
if ( ready == DTM_PORT_READY ) {
DBGMSG( "DTMsigioHandler calling user routine\n" );
#endif
(*DTMpt[i]->callback)();
#if 0
}
#endif
}
/* DBGMSG( "DTMsigioHandler exit\n" ); */
}
#ifdef DTM_PROTOTYPES
int dtm_sigio( int fd )
#else
int dtm_sigio( fd )
int fd;
#endif
{
int flags;
int pid=getpid();
int sigio_on=1;
DBGMSG1( "dtm_sigio on fd %d\n", fd );
#ifdef __hpux
if (flags = ioctl( fd, FIOSSAIOOWN, &pid) == -1 ) {
#else
if (flags = fcntl( fd, F_SETOWN, getpid()) == -1 ) {
#endif
DTMerrno = DTMSOCK;
return DTMERROR;
}
#ifdef __hpux
if (flags = ioctl( fd, FIOSSAIOSTAT, &sigio_on ) == -1 ) {
#else
if (flags = fcntl( fd, F_SETFL, FASYNC ) == -1 ) {
#endif
DTMerrno = DTMSOCK;
return DTMERROR;
}
return DTM_OK;
}
#ifdef DTM_PROTOTYPES
int DTMreadReady( int port, void (*pfn)() )
#else
int DTMreadReady( port, pfn )
int32 port;
void (*pfn)();
#endif
{
DTMPORT * pp;
DBGMSG1( "DTMreadReady on port %d\n", port );
CHECK_ERR( port = dtm_map_port_internal( port ));
pp = DTMpt[port];
/*
Just replace the function
*/
if ( pp->callback ) {
pp->callback = pfn;
return DTM_OK;
}
if ( pp->porttype != INPORTTYPE ) {
DTMerrno = DTMBADPORT;
return DTMERROR;
}
DBGMSG1( "DTMreadReady port has sockfd %d\n", pp->sockfd );
#ifndef _ARCH_MSDOS
if ( (int)signal( SIGIO, DTMsigioHandler) == -1 ) {
DBGMSG( "DTMreadReady signal failed\n" );
DTMerrno = DTMSOCK;
return DTMERROR;
}
#endif
pp->callback = pfn;
{
reg Inport *inp;
if( dtm_sigio( pp->sockfd )== DTMERROR) {
DTMerrno = DTMSOCK;
return DTMERROR;
}
FOR_EACH_IN_PORT( inp, pp ) {
if (dtm_sigio( inp->fd )== DTMERROR) {
DTMerrno = DTMSOCK;
return DTMERROR;
}
}
}
return DTM_OK;
}
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