golang1.7 关于CGO的一个小问题:C.free使用.

概述package main// #include <stdlib.h>import "C"import ( "fmt" "syscall" "unsafe")func main() { kernel := syscall.NewLazyDLL("Kernel32.dll") defer syscall.CloseHandler(syscall.

package main// #include <stdlib.h>import "C"import (    "fmt"    "syscall"    "unsafe")func main() {    kernel := syscall.NewLazyDLL("Kernel32.dll")    defer syscall.CloseHandler(syscall.Handle.(kernel.Handle()))    volume := kernel.NewProc("GetVolumePathnameA")    char := C.CString("D:")    defer C.free(unsafe.Pointer(char))    n := make([]byte,254)    _,_,err := volume.Call(uintptr(unsafe.Pointer(char)),uintptr(unsafe.Pointer(&n[0])),254)    fmt.Println(err)    fmt.Println(string(n))}

当我想使用C.free()释放申请的变量的时候.提示没有此函数.
后来百度无果,Google链接到官方文档看到下面这段解释

// Go string to C string// The C string is allocated in the C heap using malloc.// It is the caller's responsibility to arrange for it to be// freed,such as by calling C.free (be sure to include stdlib.h// if C.free is needed).func C.CString(string) *C.char// C string to Go stringfunc C.GoString(*C.char) string// C data with explicit length to Go stringfunc C.GoStringN(*C.char,C.int) string// C data with explicit length to Go []bytefunc C.GoBytes(unsafe.Pointer,C.int) []byte

所以使用C.free的时候必须要 include

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