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coder.allowpcode

Package: coder

Control code generation from protected MATLAB files

Syntax

coder.allowpcode('plain')

Description

coder.allowpcode('plain') allows you to generate protected MATLAB® code (P-code) that you can then compile into optimized MEX functions or embeddable C/C++ code. This function does not obfuscate the generated MEX functions or embeddable C/C++ code.

With this capability, you can distribute algorithms as protected P-files that provide code generation optimizations, providing intellectual property protection for your source MATLAB code.

Call this function in the top-level function before control-flow statements, such as if, while, switch, and function calls.

MATLAB functions can call P-code. When the .m and .p versions of a file exist in the same folder, the P-file takes precedence.

coder.allowpcode is ignored outside of code generation.

Examples

Generate optimized embeddable code from protected MATLAB code:

  1. Write an function p_abs that returns the absolute value of its input:

    function out = p_abs(in)   %#codegen
    % The directive %#codegen indicates that the function
    % is intended for code generation
    coder.allowpcode('plain');
    out = abs(in);
  2. Generate protected P-code. At the MATLAB prompt, enter:

    pcode p_abs

    The P-file, p_abs.p, appears in the current folder.

  3. Generate a MEX function for p_abs.p, using the -args option to specify the size, class, and complexity of the input parameter (requires a MATLAB Coder™ license). At the MATLAB prompt, enter:

    codegen p_abs -args { int32(0) }

    codegen generates a MEX function in the current folder.

  4. Generate embeddable C code for p_abs.p (requires a MATLAB Coder license). At the MATLAB prompt, enter:

    codegen p_abs -config:lib -args { int32(0) };

    codegen generates C library code in the codegen\lib\p_abs folder.

See Also

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