#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>

void doSomething(FILE * f,void * data);

void f(void)
{
 void * data=malloc(0x1000);

 if(data)
 { 
  FILE * input;
  pthread_cleanup_push(free,data);
  input=fopen("file.txt","r");
  if(input)
  { 
   pthread_cleanup_push((void (*)(void *))fclose,input);
   doSomething(input,data);
   pthread_cleanup_pop(1); /* fclose(input) */
  } 
  pthread_cleanup_pop(1);  /* free(data) */
 }
}