我有一个 native 32 位 dll(无源代码),它在我使用的应用程序中作为插件运行。我自己做了另一个 native dll,它将与该插件通信以创建和更新插件的控件。 我从那个 dll 导出了我需要的功能,以便从我的 c# 应用程序(使用 p/invoke)控制插件。
代码如下:
h 文件:
#pragma once
#include "include\SpoutControls.h"
extern "C" { __declspec(dllexport) void InitializeControls(char *sendername, int *numControls, char** names, int *types, float* floats, float* toggles, float* press, char** text); }
extern "C" { __declspec(dllexport) bool UpdateControls(const char** text, float *floats, float *toggles, float *press, int *numControls); }
extern "C" { __declspec(dllexport) void CloseControls(); }
//
extern "C" __declspec(dllexport) int ReleaseMemory(float *pArray)
{
delete[] pArray;
//delete[] Usize;
return 0;
};
中央人民政府:
#include "SpoutControls4vvvv.h"
//SpoutControls and the functions
//CreateControl, OpenControls, CheckControls, CloseControls
//are declared in SpoutControls.h, which comes with the 32 bit plugin dll
SpoutControls spoutcontrols;
void InitializeControls(char *sendername, int *numControls, char** names, int *types, float* floats, float* toggles, float* press, char** text) {
int Vcontrols = numControls[0];
int Tcontrols = numControls[1];
int Pcontrols = numControls[2];
int Scontrols = numControls[3];
int all = Vcontrols + Tcontrols + Pcontrols + Scontrols;
int v=0, t=0, p=0, s = 0;
for (int controlID = 0; controlID < all; controlID++) {
if (types[controlID] == 0) {
spoutcontrols.CreateControl(names[controlID], "float",0.0,1.0, floats[v]);
v++;
}
if (types[controlID] == 1) {
spoutcontrols.CreateControl(names[controlID], "bool", toggles[t]);
t++;
}
if (types[controlID] == 2) {
spoutcontrols.CreateControl(names[controlID], "event", press[p]);
p++;
}
if (types[controlID] == 3) {
spoutcontrols.CreateControl(names[controlID], "text", text[s]);
s++;
}
}
spoutcontrols.OpenControls(sendername);
}
bool UpdateControls(const char** text, float *floats, float *toggles, float *press, int *numControls) {
int Vcontrols = numControls[0];
int Tcontrols = numControls[1];
int Pcontrols = numControls[2];
int Scontrols = numControls[3];
int all = Vcontrols + Tcontrols + Pcontrols + Scontrols;
int v = 0, t = 0, p = 0, s = 0;
if (spoutcontrols.CheckControls(myControls)) {
for (int controlID = 0; controlID < all; controlID++) {
if (myControls[controlID].type == 10) {
floats[v] = myControls[controlID].value;
v++;
}
if (myControls[controlID].type == 0) {
toggles[t] = myControls[controlID].value;
t++;
}
if (myControls[controlID].type == 1) {
press[p] = myControls[controlID].value;
p++;
}
if (myControls[controlID].type == 100) {
text[s] = myControls[controlID].text.data();
s++;
}
}
return true;
}
return false;
}
void CloseControls() {
spoutcontrols.CloseControls();
}
这是 C# 代码:
public unsafe class SystemSpoutSenderNode: IDisposable
{
[System.Runtime.InteropServices.DllImport("SpoutControls4vvvv.dll")]
private static extern void InitializeControls(IntPtr sendername, IntPtr numControls,String[] names, IntPtr types, IntPtr floats, IntPtr toggles, IntPtr press, String[] text);
[System.Runtime.InteropServices.DllImport("SpoutControls4vvvv.dll")]
private static extern int CloseControls();
[System.Runtime.InteropServices.DllImport("SpoutControls4vvvv.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern bool UpdateControls([In, Out] String[] text, [In, Out] float[] floats, [In, Out] float[] toggles, [In, Out] float[] press, IntPtr numControls);
[System.Runtime.InteropServices.DllImport("SpoutControls4vvvv.dll")]
private static extern int ReleaseMemory(IntPtr ptr);
public void Evaluate(int SpreadMax)
{
//countControls determines number of controls per type (string,float,toggle,click)
int[] controls = countControls(FType);
//sumControls will just add up all elements in controls
int all = sumControls(controls);
//in my code these arrays will get filled with values, deleted here for readability
String[] names = new String[all];
int[] types = new int[all];
float[] floats = new float[controls[0]];
float[] toggles = new float[controls[1]];
float[] press = new float[controls[2]];
String[] text = new String[controls[3]];
//initialze return arrays
String[] Rtext = new String[controls[3]];
float[] Rfloats = new float[controls[0]];
float[] Rtoggles = new float[controls[1]];
float[] Rpress = new float[controls[2]];
//allocate pointers
IntPtr SndrNamePtr = NativeUtf8FromString(FSenderName);
IntPtr BinPtr = Marshal.AllocHGlobal(4*sizeof(int));
IntPtr TypePtr = Marshal.AllocHGlobal(all*sizeof(int));
IntPtr FloatPtr = Marshal.AllocHGlobal(controls[0]*sizeof(float));
IntPtr TogglePtr = Marshal.AllocHGlobal(controls[1]*sizeof(float));
IntPtr PressPtr = Marshal.AllocHGlobal(controls[2]*sizeof(float));
try
{
//copy control info + defaults to pointer
Marshal.Copy(controls, 0, BinPtr, 4);
Marshal.Copy(types, 0, TypePtr, all);
Marshal.Copy(floats, 0, FloatPtr, controls[0]);
Marshal.Copy(toggles, 0, TogglePtr, controls[1]);
Marshal.Copy(press, 0, PressPtr, controls[2]);
//initialize controls
if (FWrite) InitializeControls(SndrNamePtr,BinPtr,names,TypePtr,FloatPtr,TogglePtr,PressPtr,text);
//update controls
bool changed = UpdateControls(Rtext,Rfloats,Rtoggles,Rpress,BinPtr);
//FF, FT, FS and FP are the outputs in my c# host
if (changed){
for(int j=0; j<controls[0];j++){
FF[j]=Rfloats[j];
}
for(int j=0; j<controls[1];j++){
FT[j]=FloatToBool(Rtoggles[j]);
}
for(int j=0; j<controls[3];j++){
FS[j]=Rtext[j];
}
}
for(int j=0; j<controls[2];j++){
FP[j]=FloatToBool(Rpress[j]);
}
}
finally
{
Marshal.FreeHGlobal(SndrNamePtr);
Marshal.FreeHGlobal(BinPtr);
Marshal.FreeHGlobal(FloatPtr);
Marshal.FreeHGlobal(TogglePtr);
Marshal.FreeHGlobal(PressPtr);
}
}
}
}
public void Dispose()
{
CleanUp();
CloseControls();
}
}
注意:c# 代码无需在基于框架的 c# 主机环境中预编译即可运行以进行图形编程 (vvvv),因此我删除了主机特定的输入(FType、FSenderName)和输出(FF、FS)声明,FP,FT) 以避免混淆。这些将用于将此代码与其他功能“连接”。主机将在每一帧调用 Evaluate。
现在开始实际问题:
到目前为止,它在 32 位中运行良好,但在 64 位中,我的 C# 主机在没有任何消息的情况下崩溃了。经过一些阅读后,我认为这是由于 32/64 位系统中的指针大小不同,但我不确定该怎么做/如果这实际上适用于此。如果可以,我将不胜感激
- 向我解释如何(以及为什么)让这段代码在 64 位中运行
- 指出您在此过程中可能发现的任何其他错误 - 我是 c++ 的新手,并且仍然是 c# 的初学者,所以我非常有信心这里有很多需要改进的地方;特别是:内存泄漏以及将值从 C++ 传递到 C#,反之亦然...uiuiui。
我明白我不应该在 64 位中将指针转换为 int,所以我最后尝试的是从
int Vcontrols = numControls[0];
int Tcontrols = numControls[1];
int Pcontrols = numControls[2];
int Scontrols = numControls[3];
到
int Vcontrols = (INT_PTR)numControls[0];
int Tcontrols = (INT_PTR)numControls[1];
int Pcontrols = (INT_PTR)numControls[2];
int Scontrols = (INT_PTR)numControls[3];
但没有运气,因此我发布了我原来的问题,即使这是一个正确的改进(?)。
编辑:感谢@dkackman 指出了一个不清楚的地方:我的 cpp 代码调用了作为源代码 (SpoutControls.h) 与 native 32 位 dll 一起出现的函数。它不是 32 位 dll 本身的来源,而是声明用于(据我所知)访问与 32 位 dll 相同的共享内存的函数。 如果这可能是问题所在,我也可以在此处复制粘贴代码? 也可以找到here
谢谢。
最佳答案
恐怕你运气不好。如果您的进程是 64 位的,则无论您尝试多少,都无法加载 32 位的 dll。
Can I load a 32 bit DLL into a 64 bit process on Windows?
来自 https://msdn.microsoft.com/en-us/library/windows/desktop/aa384231(v=vs.85).aspx
On 64-bit Windows, a 64-bit process cannot load a 32-bit dynamic-link library (DLL).
如果无法访问其源代码,您唯一的选择是将您的主机转换为 32 位,或者找出如何在 32 位进程中托管 32 位插件并使用某种 IPC 从 64 位主机进程与其通信。
所以我猜测这与您的包装器、数组传递或互操作代码无关。
关于c# - 我的 C++ 和 C# 互操作在 64 位中崩溃,为什么?指针大小?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39192120/