linux下C C++调用C#
旧的MFC项目调用的一些库用C#来写（编译成DLL库），现在项目要移植到linux下，也想在linux下用C来调用C#，linux不支持C#,需要安装linux下C#的运行环境mono。
调用原理大概是这样子的，linux下的Ｃ／Ｃ＋＋不能直接调用C#函数的，而是通过mono提供的api,创建一个C#的运行环境，在该环境中创建C#类，再通过mono api间接调用C#。
mono的安装参考www.mono-project.com官网的，直接用apt-get安装即可，很方便。
callcsharp.cpp
#include
#include
#include
#include
#include
#define print(fmt, args...) printf(fmt "\n", ##args);
#define TRUE 1
#define FALSE 0
#define USE_OLD_LIB 0
int main()
{
const char *dlllib = "./DataMatrixLibrary.dll";
MonoDomain *domain = mono_jit_init("Mydomain");
if (!domain) {
print("domain is null");
}
MonoAssembly *assembly = mono_domain_assembly_open(domain, dlllib);
if (!assembly) {
print("assembly is null");
return -1;
}
MonoImage *image = mono_assembly_get_image(assembly);
if (!image) {
print("image is null");
return -1;
}
//----------------------------------------------------------------->
/*
//这里是对Ｃ＃类中static函数的引脚，比较简单，不用创建类
MonoMethodDesc *desc_static = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:Test", TRUE);
if (!desc_static) {
print("desc_static is null");
return -1;
}
MonoMethod *method_static = mono_method_desc_search_in_image(desc_static, image);
if (!method_static) {
print("method_static is null");
return -1;
}
mono_runtime_invoke(method_static, NULL, NULL, NULL);
*/
//DataMatrixLibrary是namespace,AisDataMatrix是类
MonoClass *my_class = mono_class_from_name(image, "DataMatrixLibrary", "AisDataMatrix");
if (!my_class) {
print("my_class is null");
return -1;
}
//创建类
MonoObject *class_instance = mono_object_new(domain, my_class);
if (!class_instance) {
print("class instance is null");
return -1;
}
//调用类的construct函数，没有参数，如果有参数，参考mono的文档，里边有介绍怎样调用有参数的构造函数
mono_runtime_object_init(class_instance);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
//获取函数说明，最后一个参数为TRUE表示第一个参数要包括namespace
MonoMethodDesc *desc_SetBarcodeAngle = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarCodeAngel", TRUE);
#else
MonoMethodDesc *desc_SetBarcodeAngle = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeAngel", TRUE);
#endif
if (!desc_SetBarcodeAngle) {
print("desc is null");
return -1;
}
//找到该函数
MonoMethod *method_SetBarcodeAngle = mono_method_desc_search_in_image(desc_SetBarcodeAngle, image);
if (!method_SetBarcodeAngle) {
print("method is null");
return -1;
}
//调用C#函数,返回值我没处理，mono文档有介绍怎样获取返回值
void *args[1];
int angel = 10;
args[0] = &angel;
mono_runtime_invoke(method_SetBarcodeAngle, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetFontFamily = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetFontFamily", TRUE);
#else
MonoMethodDesc *desc_SetFontFamily = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeFontFamily", TRUE);
#endif
if (!desc_SetFontFamily) {
print("desc_SetFontFamily is null");
return -1;
}
MonoMethod *method_SetFontFamily = mono_method_desc_search_in_image(desc_SetFontFamily, image);
if (!method_SetFontFamily) {
print("method_SetFontFamily is null");
return -1;
}
args[0] = mono_string_new(domain, "Arial");
mono_runtime_invoke(method_SetFontFamily, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetBarCodeFormat = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarCodeFormat", TRUE);
#else
MonoMethodDesc *desc_SetBarCodeFormat = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeFormat", TRUE);
#endif
if (!desc_SetBarCodeFormat) {
print("desc_SetBarCodeFormat is null");
return -1;
}
MonoMethod *method_SetBarCodeFormat = mono_method_desc_search_in_image(desc_SetBarCodeFormat, image);
if (!method_SetBarCodeFormat) {
print("method_SetBarCodeFormat is null");
return -1;
}
int bar_format = 0;
args[0] = &bar_format;
mono_runtime_invoke(method_SetBarCodeFormat, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetBarCodeWidth = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarCodeWidth", TRUE);
#else
MonoMethodDesc *desc_SetBarCodeWidth = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeWidth", TRUE);
#endif
if (!desc_SetBarCodeWidth) {
print("desc_SetBarCodeWidth is null");
return -1;
}
MonoMethod *method_SetBarCodeWidth = mono_method_desc_search_in_image(desc_SetBarCodeWidth, image);
if (!method_SetBarCodeWidth) {
print("method_SetBarCodeFormat is null");
return -1;
}
int codeWidth = 555;
args[0] = &codeWidth;
mono_runtime_invoke(method_SetBarCodeWidth, class_instance, args, NULL);
//----------------------------------------------------------------->
MonoMethodDesc *desc_SetImageWidth = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetImageWidth", TRUE);
if (!desc_SetImageWidth) {
print("desc is null");
return -1;
}
MonoMethod *method_SetImageWidth = mono_method_desc_search_in_image(desc_SetImageWidth, image);
if (!method_SetImageWidth) {
print("method_SetImageWidth is null");
return -1;
}
int imageWidth = 569;
args[0] = &imageWidth;
mono_runtime_invoke(method_SetImageWidth, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetIsNegative = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetIsNegative", TRUE);
#else
MonoMethodDesc *desc_SetIsNegative = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeNegative", TRUE);
#endif
if (!desc_SetIsNegative) {
print("desc is null");
return -1;
}
MonoMethod *method_SetIsNegative = mono_method_desc_search_in_image(desc_SetIsNegative, image);
if (!method_SetIsNegative) {
print("method_SetIsNegative is null");
return -1;
}
int isNeg = 1;
args[0] = &isNeg;
mono_runtime_invoke(method_SetIsNegative, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetIsVertical = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetIsVertical", TRUE);
#else
MonoMethodDesc *desc_SetIsVertical = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeFlip", TRUE);
#endif
if (!desc_SetIsVertical) {
print("desc_SetIsVertical is null");
return -1;
}
MonoMethod *method_SetIsVertical = mono_method_desc_search_in_image(desc_SetIsVertical, image);
if (!method_SetIsVertical) {
print("method_SetIsVertical is null");
return -1;
}
int isVer = 1;
args[0] = &isVer;
mono_runtime_invoke(method_SetIsVertical, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetIsMirror = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetIsMirror", TRUE);
#else
MonoMethodDesc *desc_SetIsMirror = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetBarcodeMirror", TRUE);
#endif
if (!desc_SetIsMirror) {
print("desc is null");
return -1;
}
MonoMethod *method_SetIsMirror = mono_method_desc_search_in_image(desc_SetIsMirror, image);
if (!method_SetIsMirror) {
print("method_SetIsMirror null");
return -1;
}
int isMirror = 1;
args[0] = &isMirror;
mono_runtime_invoke(method_SetIsMirror, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_SetImageBackColor = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetImageBackColor", TRUE);
#else
MonoMethodDesc *desc_SetImageBackColor = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:SetImageBackground", TRUE);
#endif
if (!desc_SetImageBackColor) {
print("desc_SetImageBackColor is null");
return -1;
}
MonoMethod *method_SetImageBackColor = mono_method_desc_search_in_image(desc_SetImageBackColor, image);
if (!method_SetImageBackColor) {
print("method_SetImageBackColor null");
return -1;
}
int imageBackcolor = 1;
args[0] = &imageBackcolor;
mono_runtime_invoke(method_SetImageBackColor, class_instance, args, NULL);
//----------------------------------------------------------------->
#if USE_OLD_LIB > 0
MonoMethodDesc *desc_CreateFile = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:CreateFile", TRUE);
#else
MonoMethodDesc *desc_CreateFile = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:CreateBarcodeFile", TRUE);
#endif
if (!desc_CreateFile) {
print("desc_CreateFile is null");
return -1;
}
MonoMethod *method_CreateFile = mono_method_desc_search_in_image(desc_CreateFile, image);
if (!method_CreateFile) {
print("method_CreateFile null");
return -1;
}
//这个函数有两个string参数
void *args2[2];
args2[0] = mono_string_new(domain, "0017362S123E123RX+LLSSSCCF1");
args2[1] = mono_string_new(domain, "/home/i/csharp");
mono_runtime_invoke(method_CreateFile, class_instance, args2, NULL);
/*
MonoMethodDesc *desc_GetBarCodeSize = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:GetBarCodeSize", TRUE);
if (!desc) {
print("desc is null");
return -1;
}
int codeWidth = 555;
args[0] = &codeWidth;
mono_runtime_invoke(method_SetBarCodeWidth, class_instance, args, NULL)
MonoMethodDesc *desc_CreateByte = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:CreateByte", TRUE);
if (!desc) {
print("desc is null");
return -1;
}
int codeWidth = 555;
args[0] = &codeWidth;
mono_runtime_invoke(method_SetBarCodeWidth, class_instance, args, NULL)
MonoMethodDesc *desc_CreateBmp = mono_method_desc_new("DataMatrixLibrary.AisDataMatrix:CreateBmp", TRUE);
if (!desc) {
print("desc is null");
return -1;
}
int codeWidth = 555;
args[0] = &codeWidth;
mono_runtime_invoke(method_SetBarCodeWidth, class_instance, args, NULL)
*/
mono_jit_cleanup(domain);
print("call c# success!!!");
return 0;
}
编译：
g++ -o callcsharp callcsharp.cpp `pkg-config --cflags --libs mono-2`
mono库安装在/usr/lib/mono下。
能调用C#，但是发现mono对C#支持不是很好，有些库函数执行不正常，分另在linux和windows对比测试，调用函数时参数都是一样（可以在C#用System.console.write指印出来），但是Linux和windows的返回值是不一样，说明是环境的问题。