toc - Read elapsed time from

stopwatch - MATLAB (original) (raw)

Usage notes and limitations:

• The data type returned from toc is different between MATLAB and the generated code. To avoid errors, do not use a MEX-function toc output value in MATLAB, or a MATLABtoc output value in a MEX function.
• If you call tic in a MATLAB session and toc in a MEX function, or vice versa, the timing results are not coordinated.
• The C/C++ implementation for toc in the generated code differs depending on the hardware settings stored in the code generation configuration object. By default, the hardware settings are configured for the host platform, with Hardware Board in the MATLAB Coder™ app set to MATLAB Host Computer.
  • When generating code on Windows® with Windows-compatible hardware settings, the generated C/C++ implementation uses the Windows API functionsQueryPerformanceFrequency andQueryPerformanceCounter.
  • In all other cases, the implementation uses the POSIX APIclock_gettime. When compiling code that uses the POSIX API, the preprocessor macro_POSIX_C_SOURCE must be set to an integer greater than or equal to 199309L. The code generator sets the macro to 199309L for compilation.

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.