Hello,
while working on the specification of some memory allocation directives
I noticed that zero size allocations have no consistent behaviour in
RTEMS. For example malloc( 0 ) returns NULL and posix_memalign(&p,
align, 0) returns in p a unique pointer (or NULL if no memory is
available). In POSIX zero size memory allocations are
implementation-defined behaviour. The implementation has two options:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/malloc.html
https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
See also:
http://devel.rtems.org/ticket/4390
Linux returns a unique pointer for zero size memory allocations. I tend
to use this approach as well and would like to remove the
/*
* Validate the parameters
*/
if ( !size )
return (void *) 0;
in the RTEMS malloc().
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