rfalloc.c

来自「TCP-IP红宝书源代码」· C语言 代码 · 共 28 行

/* rfalloc.c - rfalloc */

#include <conf.h>
#include <kernel.h>
#include <fserver.h>
#include <rfile.h>

/*------------------------------------------------------------------------
 *  rfalloc  --  allocate pseudo device for a remote file; return id
 *------------------------------------------------------------------------
 */
int
rfalloc(void)
{
	STATWORD ps;    
	int	i;

	disable(ps);
	for (i=0 ; i<Nrf ; i++)
		if (Rf.rftab[i].rf_state == RFREE) {
			Rf.rftab[i].rf_state = RUSED;
			restore(ps);
			return i;
		}
	restore(ps);
	return SYSERR;
}