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    The following form allows you to view linux man pages.

    Command:

    malloc_usable_size

    
    
    

    SYNOPSIS

           #include <malloc.h>
    
           size_t malloc_usable_size (void *ptr);
    
    
    

    DESCRIPTION

           The malloc_usable_size() function returns the number of usable bytes in
           the  block  pointed to by ptr, a pointer to a block of memory allocated
           by malloc(3) or a related function.
    
    
    

    RETURN VALUE

           malloc_usable_size() returns the number of usable bytes in the block of
           allocated memory pointed to by ptr.  If ptr is NULL, 0 is returned.
    
    
    

    CONFORMING TO

           This function is a GNU extension.
    
    
    

    NOTES

           The  value  returned  by  malloc_usable_size()  may be greater than the
           requested size of the allocation because of alignment and minimum  size
           constraints.   Although  the  excess  bytes  can  be overwritten by the
           application without ill effects, this is not good programming practice:
           the  number  of excess bytes in an allocation depends on the underlying
           implementation.
    
           The main use of this function is for debugging and introspection.
    
    
    

    SEE ALSO

           malloc(3)
    
    
    

    GNU 2012-03-29 MALLOC_USABLE_SIZE(3)

    
    
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