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是否可以在 C 程序中托管 CLR？

发布于 2024-08-03 05:32:30 字数 91 浏览 5 评论 0原文

我能找到的每个示例都是用 C++ 编写的，但我试图将我的项目保留在 C 语言中。是否有可能在 C 程序中托管 CLR？

如果是这样，你能给我举个例子吗？

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怪我闹别瞎闹 2024-08-10 05:32:30

正如上面的评论提示，有一组 COM API 用于托管 CLR，并且您应该能够从 C 和 C++ 调用这些 COM API。

作为示例，下面是一段快速的（未经测试的）C 代码，它展示了如何启动 CLR 并在托管程序集中执行类的静态方法（它接受字符串作为参数并返回整数）。此代码与其 C++ 对应代码之间的主要区别在于 COBJMACROS 的定义以及 _ 宏的使用（例如 ICLRRuntimeHost_Start< /code>) 调用托管 CLR 的 COM 接口。（请注意，COBJMACROS必须在 #include'ing mscoree.h 之前定义，以确保这些实用宏得到定义。）

#include <windows.h>

#define COBJMACROS
#include <mscoree.h>

int main(int argc, char **argv)
{
    HRESULT status;
    ICLRRuntimeHost *Host;
    BOOL Started;
    DWORD Result;

    Host = NULL;
    Started = FALSE;

    status = CorBindToRuntimeEx(
                 NULL,
                 NULL,
                 0,
                 &CLSID_CLRRuntimeHost,
                 &IID_ICLRRuntimeHost,
                 (PVOID *)&Host
                 );
    if (FAILED(status)) {
        goto cleanup;
    }

    status = ICLRRuntimeHost_Start(Host);
    if (FAILED(status)) {
        goto cleanup;
    }

    Started = TRUE;

    status = ICLRRuntimeHost_ExecuteInDefaultAppDomain(
                 Host,
                 L"c:\\path\\to\\assembly.dll",
                 L"MyNamespace.MyClass",
                 L"MyMethod",
                 L"some string argument to MyMethod",
                 &Result
                 );
    if (FAILED(status)) {
        goto cleanup;
    }

    // inspect Result
    // ...

cleanup:
    if (Started) {
        ICLRRuntimeHost_Stop(Host);
    }

    if (Host != NULL) {
        ICLRRuntimeHost_Release(Host);
    }

    return SUCCEEDED(status) ? 0 : 1;
}

此示例应该与 .NET 2.0+ 一起使用，尽管看起来 .NET 4.0（尚未发布）已经弃用了其中一些 API，转而使用用于托管 CLR 的新 API 集。（如果您需要它与 .NET 1.x 一起使用，则需要使用 ICorRuntimeHost 而不是 ICLRRuntimeHost。）

As the above comments hint, there is a set of COM APIs for hosting the CLR, and you should be able to call these COM APIs from both C and C++.

As an example, below is a quick piece of (untested) C code that shows how to start up the CLR and execute a static method of a class in a managed assembly (which takes in a string as an argument and returns an integer). The key difference between this code and its C++ counterpart is the definition of COBJMACROS and the use of the <type>_<method> macros (e.g. ICLRRuntimeHost_Start) to call into the CLR-hosting COM interface. (Note that COBJMACROS must be defined prior to #include'ing mscoree.h to make sure these utility macros get defined.)

#include <windows.h>

#define COBJMACROS
#include <mscoree.h>

int main(int argc, char **argv)
{
    HRESULT status;
    ICLRRuntimeHost *Host;
    BOOL Started;
    DWORD Result;

    Host = NULL;
    Started = FALSE;

    status = CorBindToRuntimeEx(
                 NULL,
                 NULL,
                 0,
                 &CLSID_CLRRuntimeHost,
                 &IID_ICLRRuntimeHost,
                 (PVOID *)&Host
                 );
    if (FAILED(status)) {
        goto cleanup;
    }

    status = ICLRRuntimeHost_Start(Host);
    if (FAILED(status)) {
        goto cleanup;
    }

    Started = TRUE;

    status = ICLRRuntimeHost_ExecuteInDefaultAppDomain(
                 Host,
                 L"c:\\path\\to\\assembly.dll",
                 L"MyNamespace.MyClass",
                 L"MyMethod",
                 L"some string argument to MyMethod",
                 &Result
                 );
    if (FAILED(status)) {
        goto cleanup;
    }

    // inspect Result
    // ...

cleanup:
    if (Started) {
        ICLRRuntimeHost_Stop(Host);
    }

    if (Host != NULL) {
        ICLRRuntimeHost_Release(Host);
    }

    return SUCCEEDED(status) ? 0 : 1;
}

This sample should work with .NET 2.0+, although it looks like .NET 4.0 (not yet released) has deprecated some of these APIs in favor of a new set of APIs for hosting the CLR. (And if you need this to work with .NET 1.x, you need to use ICorRuntimeHost instead of ICLRRuntimeHost.)

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