Ch04_VTableCStyle.c File Reference

Cookbook Chapter 4: Calling a Function Pointer from a Struct. More...

#include <infix/infix.h>
#include <stdio.h>
#include <stdlib.h>

Include dependency graph for Ch04_VTableCStyle.c:

Classes
struct	Adder
struct	AdderVTable_t

Typedefs
typedef struct AdderVTable_t	AdderVTable

Functions
static int	vtable_add (Adder *self, int amount)
static void	vtable_destroy (Adder *self)
static Adder *	create_adder (int base)
int	main ()

Variables
const AdderVTable	VTABLE = {vtable_add, vtable_destroy}

Detailed Description

Cookbook Chapter 4: Calling a Function Pointer from a Struct.

This example demonstrates how to call a function pointer that is a member of a struct. This pattern is common in C for emulating object-oriented v-tables or for creating plugin interfaces.

The process is two-step:

1. Read the function pointer from the C struct.
2. Create an infix forward trampoline for that specific function pointer's signature and call it.

Typedef Documentation

AdderVTable

typedef struct AdderVTable_t AdderVTable

Function Documentation

create_adder()

static Adder * create_adder ( int  base )

static

main()

int main

(

void

)

vtable_add()

static int vtable_add ( Adder *  self, int  amount  )

static

vtable_destroy()

static void vtable_destroy ( Adder *  self )

static

Variable Documentation

VTABLE

const AdderVTable VTABLE = {vtable_add, vtable_destroy}