C++ (Cpp) dsc_set_pid示例

示例#1

static int dvb_dsc_ioctl(struct file *file,
                         unsigned int cmd, unsigned long arg)
{
    struct aml_dsc *dsc = file->private_data;
    struct aml_dvb *dvb = dsc->dvb;
    struct am_dsc_key key;
    int ret = 0, i;
    unsigned long flags;

    spin_lock_irqsave(&dvb->slock, flags);

    switch(cmd) {
    case AMDSC_IOC_SET_PID:
        for(i=0; i<DSC_COUNT; i++) {
            if(i==dsc->id)
                continue;
            if(dvb->dsc[i].used && (dvb->dsc[i].pid==arg)) {
                ret = -EBUSY;
            }
        }
        dsc->pid = arg;
        dsc_set_pid(dsc, dsc->pid);
        break;
    case AMDSC_IOC_SET_KEY:
        if (copy_from_user(&key, (void __user *)arg, sizeof(struct am_dsc_key))) {
            ret = -EFAULT;
        } else {
            if(key.type)
                memcpy(dsc->odd, key.key, 8);
            else
                memcpy(dsc->even, key.key, 8);
            dsc->set |= 1<<(key.type);
            dsc_set_key(dsc, key.type, key.key);
        }
        break;
    default:
        ret = -EINVAL;
        break;
    }

    spin_unlock_irqrestore(&dvb->slock, flags);

    return ret;
}

示例#2

文件： aml_dvb.c 项目： akuster/linux-meson

static int dvb_dsc_release(struct inode *inode, struct file *file)
{
	struct aml_dsc *dsc = file->private_data;
	struct aml_dvb *dvb = dsc->dvb;
	unsigned long flags;

	//dvb_generic_release(inode, file);

	spin_lock_irqsave(&dvb->slock, flags);

	dsc->used = 0;
	dsc_set_pid(dsc, 0x1fff);

	dsc->pid  = 0x1fff;
	dsc->set = 0;
	dvb->dsc_dev->users--;

	spin_unlock_irqrestore(&dvb->slock, flags);

	return 0;
}