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170 lines
2.5 KiB
170 lines
2.5 KiB
18 years ago
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/* $Id: kern_synch.c,v 1.1.1.1 2006/09/14 01:59:08 root Exp $ */
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/map.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/syslog.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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void idle __P((void));
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void endtsleep __P((void *));
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int
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tsleep (chan, pri, mesg, timo)
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void *chan;
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int pri, timo;
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char *mesg;
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{
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struct proc *p = curproc;
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int catch = pri & PCATCH;
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int sig = 0;
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int s = splhigh ();
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if (!chan) {
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extern void _pmon_break(void);
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printf("chan = 0!\n");
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_pmon_break();
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panic ("tsleep !chan");
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}
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if (p->p_wchan || !chan) {
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panic ("tsleep");
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}
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p->p_wmesg = mesg;
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p->p_wchan = chan;
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p->p_pri = pri;
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if (timo) {
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timeout(endtsleep, (void *)p, timo);
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}
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if (catch) {
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p->p_flag |= SSINTR;
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if ((sig = CURSIG(p)) != 0) {
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unsleep (p);
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p->p_stat = SRUN;
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goto resume;
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}
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}
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p->p_stat = SSLEEP;
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do {
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idle ();
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} while (p->p_wchan);
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resume:
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(void) splx (s);
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p->p_flag &= ~SSINTR;
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if (p->p_flag & STIMO) {
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p->p_flag &= ~STIMO;
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if (catch == 0 || sig == 0) {
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return (EWOULDBLOCK);
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}
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}
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if (timo) {
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untimeout(endtsleep, (void *)p);
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}
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if (catch && (sig || CURSIG(p))) {
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if (p->p_sigacts->ps_sigintr & sigmask(sig)) {
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return (EINTR);
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}
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return (ERESTART);
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}
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return (0);
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}
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void
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sleep (chan, pri)
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void *chan;
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int pri;
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{
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tsleep (chan, pri, 0, 0);
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}
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void
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unsleep (p)
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struct proc *p;
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{
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int s = splhigh ();
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if (p->p_wchan) {
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p->p_wchan = 0;
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}
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(void) splx (s);
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}
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void
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setrunnable (p)
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struct proc *p;
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{
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int s = splhigh();
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if (p->p_stat != SSLEEP)
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panic ("setrunnable");
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unsleep (p);
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p->p_stat = SRUN;
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splx (s);
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}
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void
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endtsleep(sp)
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void *sp;
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{
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struct proc *p = sp;
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int s = splhigh();
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if (p->p_wchan) {
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setrunnable(p);
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p->p_flag |= STIMO;
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}
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splx(s);
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}
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void
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wakeup (chan)
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void *chan;
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{
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int s = splhigh ();
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if (curproc && curproc->p_wchan == chan) {
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unsleep (curproc);
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}
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(void) splx (s);
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}
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void
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idle ()
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{
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int s = spl0 ();
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scandevs ();
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(void) splx (s);
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}
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#include "../net/netisr.h"
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#define DOISR(isr, handler) \
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if (netisr & (1 << (isr))) { \
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netisr &= ~(1 << (isr)); \
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handler (); \
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}
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void
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softnet ()
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{
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#ifdef INET
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DOISR(NETISR_ARP, arpintr);
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DOISR(NETISR_IP, ipintr);
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#endif
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#ifdef NS
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DOISR(NETISR_NS, nsintr);
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#endif
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#ifdef ISO
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DOISR(NETISR_ISO, clnlintr);
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#endif
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#ifdef CCITT
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DOISR(NETISR_CCITT, hdintr);
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#endif
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#ifdef NETISR_SCLK
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DOISR(NETISR_SCLK, softclock);
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#endif
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}
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