lflinit.c File Reference

#include <xinu.h>

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Functions
devcall	lflinit (struct dentry *devptr)

Variables
struct lflcblk	lfltab [Nlfl]

Function Documentation

lflinit()

devcall lflinit

(

struct dentry *

devptr

)

Definition at line 11 of file lflinit.c.

References dentry::dvminor, dentry::dvnum, FALSE, LF_BLKSIZ, LF_FREE, LF_INULL, LF_NAME_LEN, lflcblk::lfbyte, lflcblk::lfdbdirty, lflcblk::lfdblock, lflcblk::lfdev, lflcblk::lfdirptr, lflcblk::lfdnum, lflcblk::lfibdirty, lflcblk::lfiblock, lflcblk::lfinum, lfltab, lflcblk::lfmutex, lflcblk::lfname, lflcblk::lfpos, lflcblk::lfstate, memset(), NULL, NULLCH, OK, and semcreate().

{
    struct  lflcblk *lfptr;     /* Ptr. to control block entry  */
    int32   i;          /* Walks through name array */

    lfptr = &lfltab[ devptr->dvminor ];

    /* Initialize control block entry */

    lfptr->lfstate = LF_FREE;   /* Device is currently unused   */
    lfptr->lfdev = devptr->dvnum;   /* Set device ID        */
    lfptr->lfmutex = semcreate(1);  /* Create the mutex semaphore   */

    /* Initialize the directory and file position */

    lfptr->lfdirptr = (struct  ldentry *) NULL;
    lfptr->lfpos = 0;
    for (i=0; i<LF_NAME_LEN; i++) {
        lfptr->lfname[i] = NULLCH;
    }

    /* Zero the in-memory index block and data block */

    lfptr->lfinum = LF_INULL;
    memset((char *) &lfptr->lfiblock, NULLCH, sizeof(struct lfiblk));
    lfptr->lfdnum = 0;
    memset((char *) &lfptr->lfdblock, NULLCH, LF_BLKSIZ);

    /* Start with the byte beyond the current data block */

    lfptr->lfbyte = &lfptr->lfdblock[LF_BLKSIZ];
    lfptr->lfibdirty = lfptr->lfdbdirty = FALSE;
    return OK;
}

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Variable Documentation

lfltab

struct lflcblk lfltab[Nlfl]

Definition at line 5 of file lflinit.c.

Referenced by lflclose(), lflcontrol(), lflgetc(), lflinit(), lflputc(), lflseek(), and lfsopen().