编写可从 MATLAB（MEX 文件）调用的 C++ 函数

创建用现代 C++ 实现并可以从 MATLAB^® 中调用的高性能函数

使用 C++ MEX API 创建具有以下特性的 MATLAB 函数：提供 C++ 程序的效率并且能够从 MATLAB 访问外部函数和库。C++ MEX API 提供以下功能：

注意

MATLAB C++ API 中的函数使用 MATLAB Data API for C++ 中定义的 matlab::data::Array 类。如果您的 MEX 函数必须在 MATLAB R2017b 或更早版本中运行，或者您更喜欢使用 C 语言，则请改用 C Matrix API，它可用于 mxArray 数据结构。有关详细信息，请参阅编写可从 MATLAB（MEX 文件）调用的 C 函数。

mex 编译 MEX 函数或引擎应用程序

`matlab::mex::Function`	Base class for C++ MEX functions
`matlab::mex::ArgumentList`	Container for inputs and outputs from C++ MEX functions

主题

编译 C++ MEX 程序
在不同平台上编译 MEX 应用程序。
Test Your Build Environment
Test your build environment with a predefined C++ MEX file.
C++ MEX API
使用 C++11 功能和 C++ Engine API 来实现 MEX 函数。

Structure of C++ MEX Function
Implement a class that overrides the function call operator () to create a functor object.
Avoid Copies of Arrays in MEX Functions
Techniques to avoid making copies of large arrays to reduce memory usage and improve execution speed.
Managing External Resources from MEX Functions
Customize the MexFunction class to better handle the resources used by your MEX function.
Handling Inputs and Outputs
Check the size and type of inputs and display error messages in MATLAB.
在 MATLAB 命令行窗口中显示输出
MEX 函数可以在 MATLAB 命令行窗口中显示输出。但是，有些编译器不支持在 MEX 函数中使用 std::cout。另一种方法是使用 std::ostringstream 和 MATLAB fprintf 函数在 MATLAB 命令行窗口中显示文本。
Making async Requests Using mexCallMATLAB
Behavior when calling back into MATLAB with an async request like matlab::engine::MATLABEngine::fevalAsync.

Data Access in Typed, Cell, and Structure Arrays
Cell and structure arrays let you write to array contents without copying entire array.
Data Types for Passing MEX Function Data
Define the correct data types to pass data between MATLAB and MEX functions.

Call MATLAB Functions from MEX Functions
Call MATLAB functions, passing arguments from and returning arguments to a MEX function.
Catch Exceptions in MEX Function
Catch exceptions thrown in a MEX function.
Execute MATLAB Statements from MEX Function
Execute MATLAB statements to create variables in the caller's workspace.

Call MATLAB from Separate Threads in MEX Function
MEX functions can call MATLAB from user-created threads using the C++ Engine asynchronous API.
Out-of-Process Execution of C++ MEX Functions
Execute C++ MEX functions in processes that are separate from the MATLAB process.

Set and Get MATLAB Variables from MEX
Put variables into or get variables from the MATLAB base and global workspaces.
MATLAB Objects in MEX Functions
Pass MATLAB objects to MEX functions.
Using MEX Functions for MATLAB Class Methods
You can use MEX functions to implement methods for MATLAB classes.