fastfnctptr.c

来自「C language fast function point sample c」· C语言 代码 · 共 69 行

#include <intrins.h>

/*
**
*/
#define LJMP_OPCODE	0x02
#define DISABLE_WARNING_C280(arg)	arg=arg;
/*
**代刚ノ fnct
*/
void AFnct0(int j)
{
	DISABLE_WARNING_C280(j);
}
void AFnct1(int j, int k)
{
	DISABLE_WARNING_C280(j);
	DISABLE_WARNING_C280(k);
}
void BFnct0(int j)
{
	DISABLE_WARNING_C280(j);
}
void BFnct1(int j, int k)
{
	DISABLE_WARNING_C280(j);
	DISABLE_WARNING_C280(k);
}


//
// main()
typedef struct _DEVICE_API{						  	
		unsigned long Fnct0;
		unsigned long Fnct1;
		}DEVICE_API;
xdata DEVICE_API XXXFNCT_TBL[2] _at_ 0x1000;

code unsigned int DEVICE_API_TBL [8] = 
{
	LJMP_OPCODE, AFnct0,
	LJMP_OPCODE, AFnct1,
	LJMP_OPCODE, BFnct0,
	LJMP_OPCODE, BFnct1,
};


#define XXXFnct0(arg)		((void (code *) (int)) 0x1000) (arg)	
#define XXXFnct1(arg0,arg1)	((void (code *) (int,int)) 0x1004) (arg0, arg1)	

void SwitchDevice(char lun)
{
	*((DEVICE_API*)XXXFNCT_TBL) = ((DEVICE_API*)DEVICE_API_TBL)[lun];
}

void main(void)
{
	SwitchDevice(0);
	XXXFnct0(23);
	XXXFnct1(23,88);

	SwitchDevice(1);
	XXXFnct0(23);
	XXXFnct1(23,88);
	while(1);

}