Matlab的墨西哥图书馆的生命周期 [英] Matlab Mex library lifecycle

问题描述

有谁知道MATLAB MEX库的生命周期是什么？特别是我感兴趣的是以下内容：

Does anyone know what the matlab mex library lifecycle is? Specifically I am interested in the following:

1. 有没有办法迫使库调用它之前加载？


2. 是库中的单或多个实例加载？


3. 是否有任何初始化钩子调用之前​​？


4. 是否有当卸载库进行清理，可截取析构挂钩/信号？

我在这里并没有在网上广泛的搜索，我无法找到这些问题的答案。我的问题与初始化一些性能成本，我想避免，如果可能的话，而不需要编写的服务。

I did an extensive search here and online and I could not find the answers to these questions. My problem has some performance cost with initialization and I would like to avoid that if possible, without needing to write a service.

推荐答案

正如我在评论中提到，在Windows中你可以实现<一个href=\"http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583.aspx\"><$c$c>DllMain入口点。这是因为MEX文件是不同后缀只是普通的DLL文件。下面是一个小例子：

As I mentioned in the comments, in Windows you could implement DllMain entry point. This is because MEX-file are just regular DLL files with different extension. Here is a minimal example:

#include "mex.h"
#include <windows.h>

BOOL APIENTRY DllMain(HANDLE hModule, DWORD dwReason, LPVOID lpReserved)
{
    switch (dwReason) {
    case DLL_PROCESS_ATTACH:
        mexPrintf("DLL_PROCESS_ATTACH: hModule=0x%x\n", hModule);
        break;
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
        break;
    case DLL_PROCESS_DETACH:
        mexPrintf("DLL_PROCESS_DETACH: hModule=0x%x\n", hModule);
        break;
    }
    return TRUE;
}

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    mexPrintf("Inside MEX-function\n");
}

下面是如何工作的：

>> mex -largeArrayDims testDLL.cpp

>> testDLL
DLL_PROCESS_ATTACH: hModule=0xa0980000
Inside MEX-function

>> testDLL
Inside MEX-function

>> clear testDLL
DLL_PROCESS_DETACH: hModule=0xa0980000

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