SWI-Prolog's heap memory allocation is based on the malloc(3)
library routines. SWI-Prolog provides the functions below as a wrapper
around malloc(). Allocation errors in these functions trap
SWI-Prolog's fatal-error handler, in which case PL_malloc()
or PL_realloc()
do not return.
Portable applications must use PL_free()
to release strings returned by PL_get_chars()
using the BUF_MALLOC argument. Portable applications may
use both PL_malloc()
and friends or malloc() and friends but should not mix these two
sets of functions on the same memory.
- void * PL_malloc(size_t
bytes)
- Allocate bytes of memory. On failure SWI-Prolog's fatal-error
handler is called and PL_malloc()
does not return. Memory allocated using these functions must use PL_realloc()
and PL_free()
rather than
realloc() and free().
- void * PL_realloc(void
*mem, size_t size)
- Change the size of the allocated chunk, possibly moving it. The
mem argument must be obtained from a previous PL_malloc()
or
PL_realloc()
call.
- void PL_free(void
*mem)
- Release memory. The mem argument must be obtained from a
previous PL_malloc()
or PL_realloc()
call.
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