golang 学习记录

package main

/*
    #include <stdio.h>
    #include <stdlib.h>
    struct CType {
        int Id;
        int Id2;
    };
    typedef struct CType TheCType;
    TheCType *getTheArray(int length){

        TheCType *ctype;

        ctype = malloc(length*sizeof(TheCType));

        return ctype;
    }
    void Free(TheCType *ctype){
        free(ctype);
    }
*/
import "C"
import (
    //"fmt"
    "reflect"
    //"time"
    "unsafe"
)

var theGoSlice []C.TheCType

func cc() {

    length := C.int(500000)

    var theCArray = C.getTheArray(length)
    C.Free(theCArray)

    sliceHeader := (*reflect.SliceHeader)((unsafe.Pointer(&theGoSlice)))
    sliceHeader.Cap = int(uintptr(length))
    sliceHeader.Len = int(uintptr(length))
    sliceHeader.Data = uintptr(unsafe.Pointer(theCArray))

}

不知道是否正确

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