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/*
* $Id: rfio_rfilefdt.c,v 1.1 2005/03/31 13:13:03 baud Exp $
*/
/*
* System remote file I/O
*/
#ifdef _WIN32
#include "Cmutex.h"
#endif
#define RFIO_KERNEL 1
#include <fcntl.h>
#if defined(_WIN32)
#define MAXHOSTNAMELEN 64
#else
#include <sys/param.h> /* For MAXHOSTNAMELEN definition */
#endif
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#include <stdlib.h>
#include "rfio.h"
#include "rfio_rfilefdt.h"
extern RFILE *rfilefdt[MAXRFD] ;
RFILE dummyrfile; /* Used to fill with a dummy value */
/*
* Seach for a free index in the rfilefdt table
*/
int DLL_DECL rfio_rfilefdt_allocentry(s)
int s;
{
#ifdef _WIN32
int i;
int rc;
if (Cmutex_lock((void *) rfilefdt,-1) != 0) {
return(-1);
}
/* Scan it */
for (i = 0; i < MAXRFD; i++) {
if (rfilefdt[i] == NULL) {
rc = i;
rfilefdt[i] = &dummyrfile;
goto _rfio_rfilefdt_allocentry_return;
}
}
serrno = ENOENT;
rc = -1;
_rfio_rfilefdt_allocentry_return:
if (Cmutex_unlock((void *) rfilefdt) != 0) {
return(-1);
}
return(rc);
#else /* _WIN32 */
return(((s >= 0) && (s < MAXRFD)) ? s : -1);
#endif /* _WIN32 */
}
/*
* Seach for a given index in the rfilefdt table
* On UNIX, if scanflag is FINDRDIR_WITH_SCAN,
* a scan of table content is performed, otherwise
* only boundary and content within the boundary
* is performed.
*/
int DLL_DECL rfio_rfilefdt_findentry(s,scanflag)
int s;
int scanflag;
{
int i;
#ifdef _WIN32
int rc;
if (Cmutex_lock((void *) rfilefdt,-1) != 0) {
return(-1);
}
/* Scan it */
for (i = 0; i < MAXRFD; i++) {
if (rfilefdt[i] != NULL) {
if (rfilefdt[i]->s == s) {
rc = i;
goto _rfio_rfilefdt_findentry_return;
}
}
}
serrno = ENOENT;
rc = -1;
_rfio_rfilefdt_findentry_return:
if (Cmutex_unlock((void *) rfilefdt) != 0) {
return(-1);
}
return(rc);
#else /* _WIN32 */
if (scanflag == FINDRFILE_WITH_SCAN) {
for (i = 0; i < MAXRFD; i++) {
if (rfilefdt[i] != NULL) {
if (rfilefdt[i]->s == s) {
return(i);
}
}
}
return(-1);
} else {
return(((s >= 0) && (s < MAXRFD) && (rfilefdt[s] != NULL)) ? s : -1);
}
#endif /* _WIN32 */
}
/*
* Seach for a given pointer in the rfilefdt table
* On UNIX, if scanflag is FINDRDIR_WITH_SCAN,
* a scan of table content is performed, otherwise
* only boundary and content within the boundary
* is performed.
*/
int DLL_DECL rfio_rfilefdt_findptr(ptr,scanflag)
RFILE *ptr;
int scanflag;
{
int i;
#ifdef _WIN32
int rc;
if (Cmutex_lock((void *) rfilefdt,-1) != 0) {
return(-1);
}
/* Scan it */
for (i = 0; i < MAXRFD; i++) {
if (rfilefdt[i] == ptr) {
rc = i;
goto _rfio_rfilefdt_findentry_return;
}
}
serrno = ENOENT;
rc = -1;
_rfio_rfilefdt_findentry_return:
if (Cmutex_unlock((void *) rfilefdt) != 0) {
return(-1);
}
return(rc);
#else /* _WIN32 */
if (scanflag == FINDRFILE_WITH_SCAN) {
for (i = 0; i < MAXRFD; i++) {
if (rfilefdt[i] == ptr) {
return(i);
}
}
return(-1);
} else {
/* This method works only in FINDRFILE_WITH_SCAN mode */
serrno = EINVAL;
return(-1);
}
#endif /* _WIN32 */
}
/*
* Free a given index in the rfilefdt table
* Warning : the argument is REALLY an index
*/
int DLL_DECL rfio_rfilefdt_freeentry(s)
int s;
{
#ifdef _WIN32
if (Cmutex_lock((void *) rfilefdt,-1) != 0) {
return(-1);
}
if (rfilefdt[s] != NULL) {
if (rfilefdt[s] != &dummyrfile) free(rfilefdt[s]);
rfilefdt[s] = NULL;
}
if (Cmutex_unlock((void *) rfilefdt) != 0) {
return(-1);
}
#else /* _WIN32 */
if ((s >= 0) && (s < MAXRFD) && (rfilefdt[s] != NULL)) {
if (rfilefdt[s] != &dummyrfile) free((char *)rfilefdt[s]);
rfilefdt[s] = NULL;
}
#endif /* _WIN32 */
return(0);
}
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