how to validate memory allocation

This is a discussion on how to validate memory allocation within the C Programming forums, part of the General Programming Boards category; Anyone help me to validate memory allocation using malloc function for the following code Code: int i,j,*page[16],u=0,p; int *array1[4]; for(i=0;i<=1;i++) ...

  1. #1
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    Feb 2008
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    how to validate memory allocation

    Anyone help me to validate memory allocation using malloc function for the following code

    Code:
     int i,j,*page[16],u=0,p;
     int *array1[4];                                                                                                                           
    
                                                                                                                                 
      for(i=0;i<=1;i++)                    
       {
         array1[i] = (int *)malloc(16*sizeof(int));
         printf("\npartition=%u\n",array1[i]);
       }
    thanks in advance

  2. #2
    cas
    cas is offline
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    What do you mean "validate"? If you want to check whether an allocation succeeded, just check against NULL:
    Code:
    int *p;
    p = malloc(50 * sizeof *p); /* cast is not necessary */
    if(p == NULL) { /* oops, the allocation failed */ }
    Also, the correct conversion specifier for printing out a pointer is %p, not %u. And here a cast is required to be completely correct, as %p requires a void* (so it follows, of course, that void pointers themselves needn't be cast).
    Code:
    /* above code, then... */
    printf("%p\n", (void *)p);

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