Thread: Question on free()

I come from a C++ background where 'delete' was different if you're working with an array of memory. With free(), does it delete the array automatically?

Code:

#include <stdio.h>
#include <stdlib.h>   
#include <string.h>  
#include "actor.h"
#include "stack.h" 

int main(void)
{         
	ASTACK stkActors;    
	ACTOR PC, PC2, PC3;
	ACTOR actTemp;

	/* Initialize the actors */
	Actor_Init(&PC, "Bob", 1);
	Actor_Init(&PC2, "Bobby", 2);
	Actor_Init(&PC3, "Other Bob", 3); 

	/* Initialize the dynamic stack of 32 actors */
	AStack_Init(&stkActors, 32);

	/* Push actors into the stack. */
	AStack_Push(&stkActors, &PC);
	AStack_Push(&stkActors, &PC2);
	AStack_Push(&stkActors, &PC3);

	/* Pop away! */
	AStack_Pop(&stkActors, &actTemp);
	Actor_Show(&actTemp);

	AStack_Pop(&stkActors, &actTemp);
	Actor_Show(&actTemp);

	AStack_Pop(&stkActors, &actTemp);
	Actor_Show(&actTemp); 

	/* Release the stack memory */
	AStack_Release(&stkActors);
 
	return 0;
}

(Just showing the code because it's beautiful).

Actually, on AStack_Release(&stkActors), I call free() this way:

Code:

void AStack_Release(ASTACK *s)
{
	if (s->p_stck != NULL)
		free(s->p_stck);
	
	s->p_stck = NULL;
}

Is that right? And I heard free() implicitly checks for null so the condition isn't necessary. Is this correct? Thanks.

PS. Just a side note, how's this C coding style above that I developed for C coding? I think OO helped me to be clear more like myStructureType_DoSomething(&myStructure, ...).