staticssize_t device_show(structdevice *dev,structdevice_attribute *attr,char*buf)//cat命令时,将会调用该函数 {returnbuf;}staticssize_t device_store(structdevice *dev,structdevice_attribute *attr,constchar*buf, size_t len)//echo命令时,将会调用该函数.{returnlen;}staticDEVICE_ATTR(my_device_tes...
原来是static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, hello_val_show, hello_val_store); 的作用 原型是#define DEVICE_ATTR(_name, _mode, _show, _store) \ struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) 函数宏DEVICE_ATTR内封装的是__ATTR(_name,_mode,...
原来是static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, hello_val_show, hello_val_store); 的作用 原型是#define DEVICE_ATTR(_name, _mode, _show, _store) \ struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) 函数宏DEVICE_ATTR内封装的是__ATTR(_name,_mode,...
@@ -462,7 +462,7 @@ static ssize_t vendor_id_show(struct device *dev,return sysfs_emit(buf, "%08x", codec->vendor_id); } DEVICE_ATTR_RO(vendor_id); static DEVICE_ATTR_RO(vendor_id);static struct attribute *ac97_dev_attrs[] = { ...
原来是static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, hello_val_show, hello_val_store);的作⽤ 原型是#define DEVICE_ATTR(_name, _mode, _show, _store) \ struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)函数宏DEVICE_ATTR内封装的是__ATTR(_name,_mode,_...
static void __attribute__((used)) __do_global_ctors_aux (void) { func_ptr *p; for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--) (*p) (); } 这里可以看到把.ctors中的函数作为一个函数指针进行遍历,所以那个初始化是会被执行到的。 4、谁来调用这个__do_global_ctors_aux...
Native侧如何引入头文件deviceinfo.h 如何在Native侧构建一个ArkTS对象 Native C++模版中,生成的so库的名称在哪里定义,需要与哪些内容保持一致 Native侧如何打印char指针 c++创建的(napi_create_object),或者作为参数传下来的js value,如果想持久持有,需要怎么做?以及怎么主动销毁或减少引用计数 在ArkTS层往C++...
Can a c# struct be serialized as a "value type" or just one of its properties? can a comma in xml attribute create any problelm. can a constructor return a value? can a Dictionary be the return type of a method? Can anyone explain clearly about FLOAT Vs DECIMAL Vs DOUBLE ? Can Dire...
The EAP protocol does not specify a standard attribute to carry IP address information. Therefore, if the EAP request packet sent by a static IP user does not contain an IP address, the IP address information in the DHCP snooping binding table is obtained from the user' first ARP request pa...
cannot set name attribute value when using a container control Cannot set Owner property to a Window that has not been shown previously - error Cannot set Visibility or call Show or ShowDialog after window has closed. cant detect enter key or space key in wpf, c# , visual studio? Canvas -...