C++ USED函数代码示例

static void
trapUSR2(int signo)
{
	USED(signo);
	/* we've done our work of interrupting sigsuspend */
}

void
docreate(Ram *r)
{
	USED(r);
}

int
dopermw(Ram *r)
{
	USED(r);
	return 0;
}

void
runtime·netpollarm(uintptr fd, int32 mode)
{
	USED(fd, mode);
	runtime·throw("unused");
}

static Block*
ext2datablock(Ext2 *fs, u32int bno, int size)
{
	USED(size);
	return ext2blockread(fs->fsys, bno);
}

//.........这里部分代码省略.........

	/*
	 * Args: pass 2: assemble; the pages will be faulted in
	 */
	tos = (Tos*)(TSTKTOP - sizeof(Tos));
	tos->cyclefreq = m->cyclefreq;
	cycles((uvlong*)&tos->pcycles);
	tos->pcycles = -tos->pcycles;
	tos->kcycles = tos->pcycles;
	tos->clock = 0;
	argv = (char**)(TSTKTOP - ssize);
	charp = (char*)(TSTKTOP - nbytes);
	args = charp;
	if(indir)
		argp = progarg;
	else
		argp = (char**)arg[1];

	for(i=0; i<nargs; i++){
		if(indir && *argp==0) {
			indir = 0;
			argp = (char**)arg[1];
		}
		*argv++ = charp + (USTKTOP-TSTKTOP);
		n = strlen(*argp) + 1;
		memmove(charp, *argp++, n);
		charp += n;
	}
	free(file0);

	free(up->text);
	up->text = elem;
	elem = nil;	/* so waserror() won't free elem */
	USED(elem);

	/* copy args; easiest from new process's stack */
	n = charp - args;
	if(n > 128)	/* don't waste too much space on huge arg lists */
		n = 128;
	a = up->args;
	up->args = nil;
	free(a);
	up->args = smalloc(n);
	memmove(up->args, args, n);
	if(n>0 && up->args[n-1]!='\0'){
		/* make sure last arg is NUL-terminated */
		/* put NUL at UTF-8 character boundary */
		for(i=n-1; i>0; --i)
			if(fullrune(up->args+i, n-i))
				break;
		up->args[i] = 0;
		n = i+1;
	}
	up->nargs = n;

	/*
	 * Committed.
	 * Free old memory.
	 * Special segments are maintained across exec
	 */
	for(i = SSEG; i <= BSEG; i++) {
		putseg(up->seg[i]);
		/* prevent a second free if we have an error */
		up->seg[i] = 0;
	}
	for(i = BSEG+1; i < NSEG; i++) {

void
handlefullmsg(Conn *c, Achan *a)
{
	int i;
	uint32_t chan, len, n, rt;
	uint8_t type;
	Msg *m, mm;
	Msg *r;
	Key *k;
	int nk;
	mpint *mod, *ek, *chal;
	uint8_t sessid[16];
	uint8_t chalbuf[32];
	uint8_t digest[16];
	DigestState *s;
	static int first;

	assert(a->len == a->ndata);

	chan = a->chan;
	mm.rp = a->data;
	mm.ep = a->data+a->ndata;
	mm.c = c;
	m = &mm;

	type = getbyte(m);

	if(first == 0){
		first++;
		fmtinstall('H', encodefmt);
	}

	switch(type){
	default:
		debug(DBG_AUTH, "unknown msg type\n");
	Failure:
		debug(DBG_AUTH, "agent sending failure\n");
		r = allocmsg(m->c, SSH_MSG_CHANNEL_DATA, 13);
		putlong(r, chan);
		putlong(r, 5);
		putlong(r, 1);
		putbyte(r, SSH_AGENT_FAILURE);
		sendmsg(r);
		return;

	case SSH_AGENTC_REQUEST_RSA_IDENTITIES:
		debug(DBG_AUTH, "agent request identities\n");
		nk = listkeys(&k);
		if(nk < 0)
			goto Failure;
		len = 1+4;	/* type, nk */
		for(i=0; i<nk; i++){
			len += 4;
			len += 2+(mpsignif(k[i].ek)+7)/8;
			len += 2+(mpsignif(k[i].mod)+7)/8;
			len += 4+strlen(k[i].comment);
		}
		r = allocmsg(m->c, SSH_MSG_CHANNEL_DATA, 12+len);
		putlong(r, chan);
		putlong(r, len+4);
		putlong(r, len);
		putbyte(r, SSH_AGENT_RSA_IDENTITIES_ANSWER);
		putlong(r, nk);
		for(i=0; i<nk; i++){
			debug(DBG_AUTH, "\t%B %B %s\n", k[i].ek, k[i].mod, k[i].comment);
			putlong(r, mpsignif(k[i].mod));
			putmpint(r, k[i].ek);
			putmpint(r, k[i].mod);
			putstring(r, k[i].comment);
			mpfree(k[i].ek);
			mpfree(k[i].mod);
			free(k[i].comment);
		}
		free(k);
		sendmsg(r);
		break;

	case SSH_AGENTC_RSA_CHALLENGE:
		n = getlong(m);
		USED(n);	/* number of bits in key; who cares? */
		ek = getmpint(m);
		mod = getmpint(m);
		chal = getmpint(m);
		memmove(sessid, getbytes(m, 16), 16);
		rt = getlong(m);
		debug(DBG_AUTH, "agent challenge %B %B %B %ud (%p %p)\n",
			ek, mod, chal, rt, m->rp, m->ep);
		if(rt != 1 || dorsa(mod, ek, chal, chalbuf) < 0){
			mpfree(ek);
			mpfree(mod);
			mpfree(chal);
			goto Failure;
		}
		s = md5(chalbuf, 32, nil, nil);
		md5(sessid, 16, digest, s);
		r = allocmsg(m->c, SSH_MSG_CHANNEL_DATA, 12+1+16);
		putlong(r, chan);
		putlong(r, 4+16+1);
		putlong(r, 16+1);
		putbyte(r, SSH_AGENT_RSA_RESPONSE);
//.........这里部分代码省略.........

void
oslongjmp(void *regs, osjmpbuf env, int val)
{
	USED(regs);
	longjmp(env, val);
}

void
SysUnused(void *v, uintptr n)
{
	USED(v);
	USED(n);
}

int
tready(void *a)
{
	USED(a);
	return isched.runhd != nil || isched.vmq != nil;
}

void
runtime·SysUsed(void *v, uintptr n)
{
	USED(v);
	USED(n);
}

void
runtime·badsignal(int32 sig)
{
	USED(sig);
	runtime·pwrite(2, badsignal, sizeof badsignal - 1, -1LL);
}

static void
portRNullPrint(Fmt *fmt, PortRNull *x)
{
	USED(x);
	fmtprint(fmt, "%s", "PortRNull");
}

static void
portTDumpPrint(Fmt *fmt, PortTDump *x)
{
	USED(x);
	fmtprint(fmt, "PortTDump");
}

static void
nop(void *v)
{
	USED(v);
}