mystdlib.c

压缩包里面的都是精致的基本C语言小程序

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "error.h"
#include "mystdlib.h"

long usedMemory = 0;

void *checkedMalloc (int size)
{
  if (size < 0)
    exception ("what going on here?\n");
    
  //printf ("size=%d\n", size);
  
  void *temp = malloc (size);
  if (!temp)
  {
    //printf ("%d\n", size);
    printf ("used memory: %lfG\n", usedMemory*1.0/1024/1024/1024);
    exception ("no memory!\n");
  }
  
  usedMemory += size;
  
  return temp;
}

void checkedFree (void *p)
{
  if (p)
  {
    //printf ("checked freeing\n");
    free (p);
  }
  else
    error ("try to free null pointers\n");
}

int checkedSystem (const char *s)
{
  return system (s);
}

void *checkedRealloc (void *p, unsigned int size)
{
  void *temp = realloc (p, size);
  assert (temp);
  return temp;
}

void memoryStatus ()
{
  printf ("memory used = %lfG\n", usedMemory*1.0/1024/1024/1024);
}