golang调用c++的dll库文件
package mainimport (
"fmt"
"syscall"
"unsafe"
)
func IntPtr(n int) uintptr {
return uintptr(n)
}
func StrPtr(s string) uintptr {
return uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(s)))
}
func Lib_add(a, b int) {
lib := syscall.NewLazyDLL("lib.dll")
fmt.Println("dll:", lib.Name)
add := lib.NewProc("add")
fmt.Println("+++++++NewProc:", add, "+++++++")
ret, _, err := add.Call(IntPtr(a), IntPtr(b))
if err != nil {
fmt.Println("lib.dll运算结果为:", ret)
}
}
func DllTestDef_add(a, b int) {
DllTestDef, _ := syscall.LoadLibrary("DllTestDef.dll")
fmt.Println("+++++++syscall.LoadLibrary:", DllTestDef, "+++++++")
defer syscall.FreeLibrary(DllTestDef)
add, err := syscall.GetProcAddress(DllTestDef, "add")
fmt.Println("GetProcAddress", add)
ret, _, err := syscall.Syscall(add,
2,
IntPtr(a),
IntPtr(b),
0)
if err != nil {
fmt.Println("DllTestDef.dll运算结果为:", ret)
}
}
func DllTestDef_add2(a, b int) {
DllTestDef := syscall.MustLoadDLL("DllTestDef.dll")
add := DllTestDef.MustFindProc("add")
fmt.Println("+++++++MustFindProc：", add, "+++++++")
ret, _, err := add.Call(IntPtr(a), IntPtr(b))
if err != nil {
fmt.Println("DllTestDef的运算结果为:", ret)
}
}
func main() {
Lib_add(4, 5)
DllTestDef_add(4, 5)
DllTestDef_add2(4, 5)
}
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