友链

还是在看驱动代码，看到了这个：

WDFDEVICE hDevice;

我去找WDFDEVICE的定义

DECLARE_HANDLE( WDFDEVICE );

然后我又去找DECLARE_HANDLE的定义

#define DECLARE_HANDLE(name) struct name##__{
      int unused;}; typedef struct name##__ *name

看懂是啥意思了吗

这相当于定义了一个WDFDEVICE结构体

#include <stdio.h>
#include <malloc.h>

#define DECLARE_HANDLE(name) struct name##__{
      int unused;}; typedef struct name##__ *name

//struct WDFDEVICE__ {
    
// int unused;
//};
//
//typedef struct WDFDEVICE__* WDFDEVICE;

int main() {
    
	DECLARE_HANDLE(test_struct_name);
	test_struct_name test_struct = (test_struct_name)malloc(sizeof(test_struct_name__));
	if (NULL == test_struct) return 0;
	test_struct->unused = 123;
	printf("%d\n", test_struct->unused);
	return 0;
}