control.c File Reference

#include <xinu.h>

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Functions
syscall	control (did32 descrp, int32 func, int32 arg1, int32 arg2)

Function Documentation

control()

syscall control	(	did32	descrp,
		int32	func,
		int32	arg1,
		int32	arg2
	)

Definition at line 9 of file control.c.

References devtab, disable(), dentry::dvcntl, isbaddev, restore(), and SYSERR.

Referenced by net_init(), and shell().

{
    intmask     mask;       /* Saved interrupt mask     */
    struct dentry   *devptr;    /* Entry in device switch table */
    int32       retval;     /* Value to return to caller    */

    mask = disable();
    if (isbaddev(descrp)) {
        restore(mask);
        return SYSERR;
    }
    devptr = (struct dentry *) &devtab[descrp];
    retval = (*devptr->dvcntl) (devptr, func, arg1, arg2);
    restore(mask);
    return retval;
}

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