如何分配内存结构，在C＃中的数组 [英] How to allocate memory for an array of structure in C#
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问题描述
结构1：
typedef结构_wfs_cdm_cu_info
{
USHORT usTellerID;
USHORT usCount;
LPWFSCDMCASHUNIT * lppList;
} WFSCDMCUINFO，* LPWFSCDMCUINFO;
2的结构：
typedef结构_wfs_cdm_cashunit
{
USHORT usNumber;
USHORT usType;
LPSTR lpszCashUnitName;
CHAR cUnitID [5];
CHAR cCurrencyID [3];
ULONG ulValues;
ULONG ulInitialCount;
ULONG ulCount;
ULONG ulRejectCount;
ULONG ulMinimum;
ULONG ulMaximum;
BOOL bAppLock;
USHORT usStatus;
USHORT usNumPhysicalCUs;
LPWFSCDMPHCU * lppPhysical;
} WFSCDMCASHUNIT，* LPWFSCDMCASHUNIT;
结构3：
typedef结构_wfs_cdm_physicalcu
{
LPSTR lpPhysicalPositionName;
CHAR cUnitID [5];
ULONG ulInitialCount;
ULONG ulCount;
ULONG ulRejectCount;
ULONG ulMaximum;
USHORT usPStatus;
BOOL bHardwareSensor;
} WFSCDMPHCU，* LPWFSCDMPHCU;
C＃结构： -
<$p$p><$c$c>[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential,字符集= System.Runtime.InteropServices.CharSet.Ansi，包= 1）]公共结构WFSCDMPHCU { [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
公共字符串lpPhysicalPositionName;[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 5）]
公共字符串cUnitID;
公共UINT ulInitialCount;
公共UINT ulCount;
公共UINT ulRejectCount;
公共UINT ulMaximum;
公共USHORT usPStatus;
公众诠释bHardwareSensor;
}
<$p$p><$c$c>[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential,字符集= System.Runtime.InteropServices.CharSet.Ansi，包= 1）]
公共结构WFSCDMCASHUNIT {
公共USHORT usNumber;
公共USHORT usType; [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
公共字符串lpszCashUnitName;[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 5）]
公共字符串cUnitID; [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 3）]
公共字符串cCurrencyID;
公共UINT ulValues;
公共UINT ulInitialCount;
公共UINT ulCount;
公共UINT ulRejectCount;
公共UINT ulMinimum;
公共UINT ulMaximum;
公众诠释bAppLock;
公共USHORT usStatus;
公共USHORT usNumPhysicalCUs;
公共System.IntPtr lppPhysical;
}
<$p$p><$c$c>[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential,包= 1）]
公共结构WFSCDMCUINFO {
公共USHORT usTellerID;
公共USHORT usCount;
公共System.IntPtr lppList;
}
的DllImport
函数[DllImport（@Dispenser.dll）]
公共静态外部INT CDM_SetCashUnit（出WFSCDMCUINFO cuinfo）;
1）我的主要问题是我应该怎样马歇尔或该结构从C＃数据发送到C ++，结构的第二和第三个结构是数组???
分配内存2）如果我使用指针如何高效的那样。
3）如果C ++ / CLI包装被继续使用我怎么可以通过C＃访问它。
这是一个漫长的时间，我的工作和我米没有搞清楚应该怎么填写结构数组在C＃。
Follwing code是我揣摩...
元帅code：
面对的一个错误来定义一个扩展非泛型静态类
公共静态的IntPtr GetIntPtr（此对象OBJ）{
尝试{
VAR手柄= GCHandle.Alloc（OBJ，GCHandleType.Pinned）;
VAR线程=新主题（（）=＆GT; {
Thread.sleep代码（20000）;
handle.Free（）;
}）;
thread.Start（）; 返回handle.AddrOfPinnedObject（）;
}赶上（ArgumentException的）{
VAR PTR = Marshal.AllocHGlobal（Marshal.SizeOf（OBJ））; Marshal.StructureToPtr（OBJ，PTR，FALSE）; 返回PTR;
}
} 公共静态ŧFromIntPtr＆LT; T＆GT;（这个IntPtr的PTR）{
如果（PTR == IntPtr.Zero）
返回默认（T）; 回报（T）Marshal.PtrToStructure（PTR的typeof（T））;
}
我如何调用该函数的C ++ code，A链接中给出。<一个href=\"http://stackoverflow.com/questions/30184208/how-to-dynamically-fill-the-structure-which-is-a-pointer-to-pointer-of-arrays-in/30195771?noredirect=1#comment48798363_30195771\">link
解决方案
这是在C＃我的结构映射：
[StructLayout（LayoutKind.Sequential）]
公共结构信息
{
公共UINT的MsgId;
公共UINT DLC;
公共UINT时间间隔;
公共UINT句柄;
[的MarshalAs（UnmanagedType.ByValArray，SizeConst = 64）]
公共字节[]数据;
};
C ++在这里：
结构信息{
unsigned int类型的MsgId;
unsigned int类型DLC;
无符号整型区间;
无符号整型句柄;
unsigned char型数据[64];
};
我在C ++中，需要这样的结构作为参数的方法：
的externC__declspec（dllexport）的INT _stdcall MessageWrapper（消息* MSG）
这是我如何调用此方法从C＃：
消息帧=新的Message（）;
frame.MsgId =（UINT）的MsgId;
frame.DLC =（UINT）DLC;
frame.Interval =（UINT）间隔;
frame.Data =新的字节[64];
INT rawsize = Marshal.SizeOf（架）;
IntPtr的帧缓冲= Marshal.AllocHGlobal（rawsize）;
Marshal.StructureToPtr（帧，帧缓冲，FALSE）;
在这里调用方法：
INT响应= HwWrapper.MessageWrapper卡（framebuffer）;
您可能必须在C做了一些修改++，你可以在C＃回到这里阅读：
=帧（消息）（Marshal.PtrToStructure卡（framebuffer的typeof（消息）））;
Marshal.FreeHGlobal卡（framebuffer）;
Structure 1:
typedef struct _wfs_cdm_cu_info
{
USHORT usTellerID;
USHORT usCount;
LPWFSCDMCASHUNIT * lppList;
} WFSCDMCUINFO, * LPWFSCDMCUINFO;
Structure 2:
typedef struct _wfs_cdm_cashunit
{
USHORT usNumber;
USHORT usType;
LPSTR lpszCashUnitName;
CHAR cUnitID[5];
CHAR cCurrencyID[3];
ULONG ulValues;
ULONG ulInitialCount;
ULONG ulCount;
ULONG ulRejectCount;
ULONG ulMinimum;
ULONG ulMaximum;
BOOL bAppLock;
USHORT usStatus;
USHORT usNumPhysicalCUs;
LPWFSCDMPHCU * lppPhysical;
} WFSCDMCASHUNIT, * LPWFSCDMCASHUNIT;
Structure 3:
typedef struct _wfs_cdm_physicalcu
{
LPSTR lpPhysicalPositionName;
CHAR cUnitID[5];
ULONG ulInitialCount;
ULONG ulCount;
ULONG ulRejectCount;
ULONG ulMaximum;
USHORT usPStatus;
BOOL bHardwareSensor;
} WFSCDMPHCU, * LPWFSCDMPHCU;
C# structure:-
[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, CharSet=System.Runtime.InteropServices.CharSet.Ansi, Pack = 1)]
public struct WFSCDMPHCU { [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
public string lpPhysicalPositionName;[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=5)]
public string cUnitID;
public uint ulInitialCount;
public uint ulCount;
public uint ulRejectCount;
public uint ulMaximum;
public ushort usPStatus;
public int bHardwareSensor;
}
[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, CharSet=System.Runtime.InteropServices.CharSet.Ansi, Pack = 1)]
public struct WFSCDMCASHUNIT {
public ushort usNumber;
public ushort usType; [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)]
public string lpszCashUnitName;[System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=5)]
public string cUnitID; [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=3)]
public string cCurrencyID;
public uint ulValues;
public uint ulInitialCount;
public uint ulCount;
public uint ulRejectCount;
public uint ulMinimum;
public uint ulMaximum;
public int bAppLock;
public ushort usStatus;
public ushort usNumPhysicalCUs;
public System.IntPtr lppPhysical;
}
[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, Pack = 1)]
public struct WFSCDMCUINFO {
public ushort usTellerID;
public ushort usCount;
public System.IntPtr lppList;
}
DLLImport
[DllImport(@"Dispenser.dll")]
public static extern int CDM_SetCashUnit(out WFSCDMCUINFO cuinfo);
1)My main problem is How should I marshall or allocate memory for this structure to send data from C# to C++ ,the second and third structure being array of structure???
2)If I use pointer how efficient it would be.
3)If C++/CLI wrapper be used then how I could access it through C#.
It is been a long time I'm working and I m yet to figure out how should I fill the array of structures in C# .
Follwing code is what i try to figure out...
Marshal Code:
Facing an error of "to define an extension non generic static class"
public static IntPtr GetIntPtr(this object obj) {
try {
var handle = GCHandle.Alloc(obj, GCHandleType.Pinned);
var thread = new Thread(() => {
Thread.Sleep(20000);
handle.Free();
});
thread.Start();
return handle.AddrOfPinnedObject();
} catch (ArgumentException) {
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf(obj));
Marshal.StructureToPtr(obj, ptr, false);
return ptr;
}
}
public static T FromIntPtr<T>(this IntPtr ptr) {
if (ptr == IntPtr.Zero)
return default(T);
return (T) Marshal.PtrToStructure(ptr, typeof (T));
}
A link of C++ code, of how I have called the function is given.link
解决方案
This is my structure mapping in c#:
[StructLayout(LayoutKind.Sequential)]
public struct Message
{
public uint MsgId;
public uint DLC;
public uint Interval;
public uint Handle;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
public byte[] Data;
};
C++ here:
struct Message {
unsigned int MsgId;
unsigned int DLC;
unsigned int Interval;
unsigned int Handle;
unsigned char Data[64];
} ;
My method in c++ which needs such a structure as a parameter:
extern "C" __declspec(dllexport) int _stdcall MessageWrapper( Message *msg)
Here is how i call this method from C#:
Message frame = new Message();
frame.MsgId = (uint)MsgId;
frame.DLC = (uint)Dlc;
frame.Interval = (uint)Interval;
frame.Data = new byte[64];
int rawsize = Marshal.SizeOf(frame);
IntPtr frameBuffer = Marshal.AllocHGlobal(rawsize);
Marshal.StructureToPtr(frame, frameBuffer, false);
Call the method here:
int response = HwWrapper.MessageWrapper(frameBuffer);
You may have some modifications made in c++ and you can read them back here in c#:
frame = (Message)(Marshal.PtrToStructure(frameBuffer, typeof(Message)));
Marshal.FreeHGlobal(frameBuffer);
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