C + +/CLI-managed + + Fabric package (memory aligned #pragma pack) "9"

When the CLI encapsulates a structure that involves memory alignment, it uses StructLayoutAttribute, which specifies that the Pack is a property of 1, 4, 8, and so on .

"1" C + + export function, using 1-bit alignment

#pragma pack (push) #pragma pack (1) typedef struct _TESTSTRU2{INTIVAL;CHARCVAL;__INT64 llval;} TESTSTRU2; #pragma pack (POP)

4.2 struct boundary alignment exportdll_class void Struct_packn (TestStru2 *pstru) {if (NULL = = Pstru) {return;} Pstru->ival = 1;pstru->cval = ' a ';p stru->llval = 2;wprintf (L "struct_packn \ n");}

CLI Encapsulation:

[Serializable] [StructLayoutAttribute (Layoutkind::sequential, pack=1)]public ref struct test2{    int32ival;    Sbytecval;    Int64   Llval;    void Unmanagedptr2managedstru (IntPtr ptr)    {        TestStru2 *ptstru = Static_cast<teststru2 *> (ptr. ToPointer ());        if (NULL = = Ptstru)            return;        Ival = ptstru->ival;        Cval = ptstru->cval;        Llval= ptstru->llval;    }};    

void Exportcli::structcls::structpackn (test2^%pstru) {    if (Pstru = = nullptr)    {        return;    }    TESTSTRU2  strt;    Strt.ival = pstru->ival;    Strt.cval = pstru->cval;    Strt.llval = pstru->llval;    Struct_packn (&STRT);    Pstru->unmanagedptr2managedstru (INTPTR (&STRT));}

CLI class declaration:

<summary>///3 Structural Test class//</summary>public ref class Structcls{public:///<summary>//    3.1 Structure as input/output parameter///</summary>//    <param name= "Pstru" > Structure </param>      static void Structchange (test1^%pstru);    <summary>///    3.2 structure Boundary alignment///</summary>//    <param name= "Pstru" > Structure </param>      static  void Structpackn (test2^%pstru);    <summary>////    3.3 structure contains an array of built-in data types///</summary>//    <param name= "Pstru" > struct </param>      static  void Structchangearr (test3^%pstru);    <summary>//    3.4 union type contains structure///</summary>//    <param name= "Pstru" > struct </ param>      static  void Structunion (test4^%pstru);    <summary>////    3.5 struct Array as parameter///</summary>//    <param name= "Pstru" > struct array </ param>      static  void Structstruarr (list<test5^>^ pstru);

C # test program:

You can see that the length of the struct is 13.

Test2 tStru2 = new Test2 (); Tstru2.ival  = 0;tstru2.cval  = 0;tstru2.llval = 0;int size = marshal.sizeof (Tstru2.gett Ype ()); STRUCTCLS.STRUCTPACKN (ref TSTRU2);

Source Address:

Https://coding.net/u/aoshilangCode/p/CLI/git

C + +/CLI-managed + + Fabric package (memory aligned #pragma pack) "9"