Appeler C à partir de MATLAB

Appeler directement les fonctions d’une bibliothèque C depuis MATLAB^® R2021b ou version antérieure avec la fonction calllib

Une bibliothèque partagée est une collection de fonctions chargées de manière dynamique par une application au run time.

Remarque

Utilisez cette interface MATLAB dans MATLAB R2021b ou version antérieure pour appeler les fonctions d’une bibliothèque C. L’approche recommandée pour appeler les fonctions de bibliothèques C et C++ consiste à créer une interface MATLAB vers la bibliothèque. Pour plus d’informations, consultez Appeler C/C++ à partir de MATLAB. (depuis R2022a)

Fonctions

`loadlibrary`	Load C shared library into MATLAB
`unloadlibrary`	Unload shared C library from memory
`calllib`	Call function in C shared library
`libfunctions`	Return information on functions in shared C library
`libfunctionsview`	Display shared C library function signatures in window
`libisloaded`	Determine if shared C library is loaded
`libpointer`	Pointer object for use with shared C library
`libstruct`	Convert MATLAB structure to C-style structure for use with shared C library

Classes

lib.pointer Pointer object compatible with C pointer

Rubriques

Call Functions in C Library Loaded with loadlibrary

How to call functions in external, shared C libraries from MATLAB using calllib.
- Load and Unload C Shared Library
- View Library Functions
- Invoke Library Functions
- Shared Library shrlibsample
- Iterate Through lib.pointer Object
Pass Arguments to Shared C Library Functions

How to construct MATLAB arguments compatible with the argument types found in the library functions.
- Pass String Arguments Examples
- Pass Arrays Examples
- Pass Enumerated Types Examples
Represent Pointer Arguments in C Shared Library Functions

How to use libpointer to pass arguments by reference.
- Pass Pointers Examples
Represent Structure Arguments in C Shared Library Functions

Requirements for passing a MATLAB structure to an external library function.
- Pass Structures Examples
- Explorer les objets libstruct
MATLAB Prototype Files
How to modify C header file information.

Résolution des problèmes

Limitations to Shared Library Support

C language features not supported.

Limitations Using Structures

Rules for using C language structures in a shared library.

Loading Library Errors

Errors occur when the shared library is not a valid library.

No Matching Signature Error

This error occurs when you call a function without the correct input or output arguments, or if there is an error in the function signature in the header file.

MATLAB Terminates Unexpectedly When Calling Function in Shared Library

Some shared libraries, compiled as Microsoft^® Windows^® 32-bit libraries, use a calling convention that is incompatible with the default MATLAB calling convention.