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C++ devdirread函数代码示例

本文整理汇总了C++中devdirread函数的典型用法代码示例。如果您正苦于以下问题：C++ devdirread函数的具体用法？C++ devdirread怎么用？C++ devdirread使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。


在下文中一共展示了devdirread函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: kbinread

static int32_t
kbinread(Chan *c, void *a, int32_t n, int64_t _)
{
	if(c->qid.type == QTDIR)
		return devdirread(c, a, n, kbintab, nelem(kbintab), devgen);
	return 0;
}
开发者ID:dancrossnyc，项目名称:harvey，代码行数:7，代码来源:devkbin.c

示例2: pointerread

static long
pointerread(Chan* c, void* a, long n, vlong)
{
	Pointer mt;
	char tmp[128];
	int l;

	switch((ulong)c->qid.path){
	case Qdir:
		return devdirread(c, a, n, pointertab, nelem(pointertab), devgen);
	case Qpointer:
		qlock(&mouse.q);
		if(waserror()) {
			qunlock(&mouse.q);
			nexterror();
		}
		mt = mouseconsume();
		poperror();
		qunlock(&mouse.q);
		l = sprint(tmp, "m%11d %11d %11d %11lud ", mt.x, mt.y, mt.b, mt.msec);
		if(l < n)
			n = l;
		memmove(a, tmp, n);
		break;
	case Qcursor:
		/* TO DO: interpret data written as Image; give to drawcursor() */
		break;
	default:
		n=0;
		break;
	}
	return n;
}
开发者ID:8l，项目名称:inferno，代码行数:33，代码来源:devpointer.c

示例3: envread

static int32_t
envread(Chan *c, void *a, int32_t n, int64_t off)
{
	Egrp *eg;
	Evalue *e;
	int32_t offset;

	if(c->qid.type & QTDIR)
		return devdirread(c, a, n, 0, 0, envgen);

	eg = envgrp(c);
	rlock(&eg->rwl);
	e = envlookup(eg, nil, c->qid.path);
	if(e == 0) {
		runlock(&eg->rwl);
		error(Enonexist);
	}

	offset = off;
	if(offset > e->len)	/* protects against overflow converting int64_t to long */
		n = 0;
	else if(offset + n > e->len)
		n = e->len - offset;
	if(n <= 0)
		n = 0;
	else
		memmove(a, e->value+offset, n);
	runlock(&eg->rwl);
	return n;
}
开发者ID:Requaos，项目名称:harvey，代码行数:30，代码来源:devenv.c

示例4: eiaread

static long
eiaread(Chan *c, void *buf, long n, vlong offset)
{
	ssize_t cnt;
	int port = NETID(c->qid.path);

	if(c->qid.type & QTDIR)
		return devdirread(c, buf, n, eiadir, ndir, devgen);

	switch(NETTYPE(c->qid.path)) {
	case Ndataqid:
	  	osenter(); 
		cnt = read(eia[port].fd, buf, n);
		osleave(); 
		if(cnt == -1)
			oserror();
		return cnt;
	case Nctlqid:
		return readnum(offset, buf, n, port, NUMSIZE);
	case Nstatqid:
		return rdstat(port, buf, n, offset);
	}

	return 0;
}
开发者ID:8l，项目名称:inferno，代码行数:25，代码来源:deveia-posix.c

示例5: regressread

static long
regressread(struct chan *c, void *va, long n, int64_t off)
{
	uint64_t w, *bp;
	char *a, *ea;
	uintptr_t offset = off;
	uint64_t pc;
	int snp_ret, ret = 0;

	switch((int)c->qid.path){
	case Monitordirqid:
		n = devdirread(c, va, n, regresstab, ARRAY_SIZE(regresstab), devgen);
		break;

	case Monitorctlqid:
		n = readstr(off, va, n, ctlcommands);
		break;

	case Monitordataqid:
		if (regress.monitor) {
			printd("monitordataqid: regress.monitor %p len %p\n", regress.monitor, qlen(kprof.monitor));
			if (qlen(regress.monitor) > 0)
				n = qread(regress.monitor, va, n);
			else
				n = 0;
		} else
			error(EFAIL, "no monitor queue");
		break;
	default:
		n = 0;
		break;
	}
	return n;
}
开发者ID:GanShun，项目名称:akaros，代码行数:34，代码来源:regress.c

示例6: wdread

static long
wdread(Chan* c, void* a, long n, vlong off)
{
	ulong offset = off;
	char *p;

	switch((ulong)c->qid.path){
	case Qdir:
		return devdirread(c, a, n, wddir, nelem(wddir), devgen);

	case Qwdctl:
		if(wd == nil || wd->stat == nil)
			return 0;

		p = malloc(READSTR);
		if(p == nil)
			error(Enomem);
		if(waserror()){
			free(p);
			nexterror();
		}

		wd->stat(p, p + READSTR);
		n = readstr(offset, a, n, p);
		free(p);
		poperror();
		return n;

	default:
		error(Egreg);
		break;
	}
	return 0;
}
开发者ID:enockseth，项目名称:Plan-9，代码行数:34，代码来源:devwd.c

示例7: eiaread

static long
eiaread(Chan *c, void *buf, long n, vlong offset)
{
	DWORD cnt;
	int port = NETID(c->qid.path);
	BOOL good;

	if(c->qid.type & QTDIR)
		return devdirread(c, buf, n, eiadir, ndir, devgen);

	switch(NETTYPE(c->qid.path)) {
	case Ndataqid:
		cnt = 0;
		// if ReadFile timeouts and cnt==0 then just re-read
		// this will give osleave() a chance to detect an
		// interruption (i.e. killprog)
		while(cnt==0) {
  			osenter(); 
			good = ReadFile(eia[port].comfh, buf, n, &cnt, NULL);
			SleepEx(0,FALSE);  //allow another thread access to port
			osleave();
			if(!good)
				oserror();
		}
		return cnt;
	case Nctlqid:
		return readnum(offset, buf, n, eia[port].id, NUMSIZE);
	case Nstatqid:
		return rdstat(port, buf, n, offset);
	}

	return 0;
}
开发者ID:BGCX261，项目名称:znos-git，代码行数:33，代码来源:deveia.c

示例8: ver_read

static size_t ver_read(struct chan *c, void *va, size_t n, off64_t off)
{
	switch ((int) c->qid.path) {
	case Kverdirqid:
		return devdirread(c, va, n, vertab, ARRAY_SIZE(vertab), devgen);
	case Kverbuildid:
		return read_buildid(va, n, off);
	case Kverdate:
		if (build_info_date)
			return ver_emit_nlstr(va, build_info_date, n,
					      (long) off);
		break;
	case Kvercommitid:
		if (build_info_commitid)
			return ver_emit_nlstr(va, build_info_commitid, n,
					      (long) off);
		break;
	case Kverversion:
		if (build_info_version)
			return ver_emit_nlstr(va, build_info_version, n,
					      (long) off);
		break;
	case Kverversionname:
		if (build_info_version_name)
			return ver_emit_nlstr(va, build_info_version_name, n,
					      (long) off);
		break;
	case Kverkconfig:
		return readstr(off, va, n, __kconfig_str);
	default:
		error(EINVAL, ERROR_FIXME);
	}

	return 0;
}
开发者ID:brho，项目名称:akaros，代码行数:35，代码来源:version.c

示例9: envread

static long
envread(Chan *c, void *a, long n, vlong offset)
{
	Egrp *eg;
	Evalue *e;

	if(c->qid.type & QTDIR)
		return devdirread(c, a, n, 0, 0, envgen);
	eg = up->env->egrp;
	qlock(&eg->l);
	for(e = eg->entries; e != nil; e = e->next)
		if(e->qid.path == c->qid.path)
			break;
	if(e == nil) {
		qunlock(&eg->l);
		error(Enonexist);
	}
	if(offset > e->len)	/* protects against overflow converting vlong to ulong */
		n = 0;
	else if(offset + n > e->len)
		n = e->len - offset;
	if(n <= 0)
		n = 0;
	else
		memmove(a, e->val+offset, n);
	qunlock(&eg->l);
	return n;
}
开发者ID:AndreasBriese，项目名称:node9，代码行数:28，代码来源:devenv.c

示例10: rtcread

static long	 
rtcread(Chan *c, void *buf, long n, vlong offset)
{
	ulong t, ot;

	if(c->qid.type & QTDIR)
		return devdirread(c, buf, n, rtcdir, NRTC, devgen);

	switch((ulong)c->qid.path){
	case Qrtc:
		qlock(&rtclock);
		t = rtctime();
		do{
			ot = t;
			t = rtctime();	/* make sure there's no skew */
		}while(t != ot);
		qunlock(&rtclock);
		n = readnum(offset, buf, n, t, 12);
		return n;
	case Qnvram:
		if(offset > NVREAD)
			return 0;
		if(n > NVREAD - offset)
			n = NVREAD - offset;
		qlock(&rtclock);
		memmove(buf, nvr.ram+offset, n);
		qunlock(&rtclock);
		return n;
	}
	error(Egreg);
	return 0;		/* not reached */
}
开发者ID:8l，项目名称:inferno，代码行数:32，代码来源:devrtc.c

示例11: piperead

static long piperead(struct chan *c, void *va, long n, int64_t ignored)
{
	Pipe *p;

	p = c->aux;

	switch (NETTYPE(c->qid.path)) {
		case Qdir:
			return devdirread(c, va, n, p->pipedir, ARRAY_SIZE(pipedir),
							  pipegen);
		case Qdata0:
			if (c->flag & O_NONBLOCK)
				return qread_nonblock(p->q[0], va, n);
			else
				return qread(p->q[0], va, n);
		case Qdata1:
			if (c->flag & O_NONBLOCK)
				return qread_nonblock(p->q[1], va, n);
			else
				return qread(p->q[1], va, n);
		default:
			panic("piperead");
	}
	return -1;	/* not reached */
}
开发者ID:GanShun，项目名称:akaros，代码行数:25，代码来源:pipe.c

示例12: netifread

long
netifread(struct netif *nif, struct chan *c, void *a, long n, uint32_t offset)
{
	int i, j;
	struct netfile *f;
	char *p;

	if (c->qid.type & QTDIR)
		return devdirread(c, a, n, (struct dirtab *)nif, 0, netifgen);

	switch (NETTYPE(c->qid.path)) {
		case Ndataqid:
			f = nif->f[NETID(c->qid.path)];
			return qread(f->in, a, n);
		case Nctlqid:
			return readnum(offset, a, n, NETID(c->qid.path), NUMSIZE);
		case Nstatqid:
			p = kzmalloc(READSTR, 0);
			if (p == NULL)
				return 0;
			j = snprintf(p, READSTR, "in: %d\n", nif->inpackets);
			j += snprintf(p + j, READSTR - j, "link: %d\n", nif->link);
			j += snprintf(p + j, READSTR - j, "out: %d\n", nif->outpackets);
			j += snprintf(p + j, READSTR - j, "crc errs: %d\n", nif->crcs);
			j += snprintf(p + j, READSTR - j, "overflows: %d\n",
						  nif->overflows);
			j += snprintf(p + j, READSTR - j, "soft overflows: %d\n",
						  nif->soverflows);
			j += snprintf(p + j, READSTR - j, "framing errs: %d\n",
						  nif->frames);
			j += snprintf(p + j, READSTR - j, "buffer errs: %d\n", nif->buffs);
			j += snprintf(p + j, READSTR - j, "output errs: %d\n", nif->oerrs);
			j += snprintf(p + j, READSTR - j, "prom: %d\n", nif->prom);
			j += snprintf(p + j, READSTR - j, "mbps: %d\n", nif->mbps);
			j += snprintf(p + j, READSTR - j, "addr: ");
			for (i = 0; i < nif->alen; i++)
				j += snprintf(p + j, READSTR - j, "%02.2x", nif->addr[i]);
			snprintf(p + j, READSTR - j, "\n");
			n = readstr(offset, a, n, p);
			kfree(p);
			return n;
		case Naddrqid:
			p = kzmalloc(READSTR, 0);
			if (p == NULL)
				return 0;
			j = 0;
			for (i = 0; i < nif->alen; i++)
				j += snprintf(p + j, READSTR - j, "%02.2x", nif->addr[i]);
			n = readstr(offset, a, n, p);
			kfree(p);
			return n;
		case Ntypeqid:
			f = nif->f[NETID(c->qid.path)];
			return readnum(offset, a, n, f->type, NUMSIZE);
		case Nifstatqid:
			return 0;
	}
	error(Ebadarg);
	return -1;	/* not reached */
}
开发者ID:alfongj，项目名称:akaros，代码行数:60，代码来源:netif.c

示例13: envread

static long
envread(Chan *c, void *a, long n, vlong off)
{
	Egrp *eg;
	Evalue *e;
	ulong offset = off;

	if(c->qid.type & QTDIR)
		return devdirread(c, a, n, 0, 0, envgen);

	eg = envgrp(c);
	rlock(eg);
	if(waserror()){
		runlock(eg);
		nexterror();
	}

	e = envlookup(eg, nil, c->qid.path);
	if(e == nil)
		error(Enonexist);
	if(offset >= e->len || e->value == nil)
		n = 0;
	else if(offset + n > e->len)
		n = e->len - offset;
	if(n <= 0)
		n = 0;
	else
		memmove(a, e->value+offset, n);

	runlock(eg);
	poperror();
	return n;
}
开发者ID:srk-cmu，项目名称:9problems，代码行数:33，代码来源:devenv.c

示例14: dupread

static long
dupread(Chan *c, void *va, long n, vlong offset)
{
	char *a = va;
	char buf[256];
	int fd, twicefd;

	if(c->qid.type == QTDIR)
		return devdirread(c, a, n, nil, 0, dupgen);
	twicefd = c->qid.path - 1;
	fd = twicefd/2;
	if(twicefd & 1){
		c = fdtochan(up->env->fgrp, fd, -1, 0, 1);
		if(waserror()){
			cclose(c);
			nexterror();
		}
		progfdprint(c, fd, 0, buf, sizeof buf);
		poperror();
		cclose(c);
		return readstr((ulong)offset, va, n, buf);
	}
	panic("dupread");
	return 0;
}
开发者ID:8l，项目名称:inferno，代码行数:25，代码来源:devdup.c

示例15: flashread

static long	 
flashread(Chan *c, void *buf, long n, vlong offset)
{
	Flash *f;
	char *s, *o;
	Flashpart *fp;
	Flashregion *r;
	int i;
	ulong start, end;

	if(c->qid.type & QTDIR)
		return devdirread(c, buf, n, nil, 0, flashgen);

	f = flash.card[c->dev];
	fp = &f->part[PART(c->qid.path)];
	if(fp->name == nil)
		error(Egreg);
	switch(TYPE(c->qid.path)){
	case Qdata:
		offset += fp->start;
		if(offset >= fp->end)
			return 0;
		if(offset+n > fp->end)
			n = fp->end - offset;
		n = readflash(f, buf, offset, n);
		if(n < 0)
			error(Eio);
		return n;
	case Qctl:
		s = malloc(READSTR);
		if(waserror()){
			free(s);
			nexterror();
		}
		o = seprint(s, s+READSTR, "%#2.2ux %#4.4ux %d %q\n",
			f->id, f->devid, f->width, f->sort!=nil? f->sort: "nor");
		for(i=0; i<f->nr; i++){
			r = &f->regions[i];
			if(r->start < fp->end && fp->start < r->end){
				start = r->start;
				if(fp->start > start)
					start = fp->start;
				end = r->end;
				if(fp->end < end)
					end = fp->end;
				o = seprint(o, s+READSTR, "%#8.8lux %#8.8lux %#8.8lux", start, end, r->erasesize);
				if(r->pagesize)
					o = seprint(o, s+READSTR, " %#8.8lux", r->pagesize);
				o = seprint(o, s+READSTR, "\n");
			}
		}
		n = readstr(offset, buf, n, s);
		poperror();
		free(s);
		return n;
	}
	error(Egreg);
	return 0;		/* not reached */
}
开发者ID:8l，项目名称:inferno，代码行数:59，代码来源:devflash.c


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