SDL_LoadFunction

Use this function to look up the address of _the ^a named function in the shared object and return it.

Syntax

void* SDL_LoadFunction(void*       handle,
                       const char* name)

Function Parameters

Return Value

green

*
Returns a pointer to the function or NULL if there was an error; call SDL_GetError() for more information.
*

Code Examples

#include "SDL_loadso.h"

// Variable declaration
void* myHandle = NULL;
char* myFunctionName = "myFancyFunction";
void (*myFancyFunction)(int anInt);

// Dynamically load mylib.so
myHandle = SDL_LoadObject("mylib.so");

// Load the exported function from mylib.so
// The exported function has the following prototype
// void myFancyFunction(int anInt);
myFancyFunction = (void (*)(int))SDL_LoadFunction( myHandle, myFunctionName );

// Call myFancyFunction with a random integer
if (myFancyFunction != NULL) {
    myFancyFunction( 15 );
}
else {
   // Error handling here
}

Remarks

This address is no longer valid after calling SDL_UnloadObject().

*
Given a valid shared object handle returned by SDL_LoadObject(), this function looks up the address of the named function in the shared object and returns it.

These functions only work on C function names. Other languages may have name mangling and intrinsic language support that varies from compiler to compiler.

Make sure you declare your function pointers with the same calling convention as the actual library function. Your code will crash mysteriously if you do not do this.

Avoid namespace collisions. If you load a symbol from the library, it is not defined whether or not it goes into the global symbol namespace for the application. If it does and it conflicts with symbols in your code or other shared libraries, you will not get the results you expect.
*

Related Functions

• SDL_LoadObject *

• SDL_UnloadObject *

CategoryAPI, CategorySharedObject