static unsigned xms_realloc(unsigned dosptr, unsigned size)
{
unsigned char *optr = &ext_mem_base[dosptr - (LOWMEM_SIZE + HMASIZE)];
unsigned char *ptr = smrealloc(&mp, optr, size);
if (!ptr)
return 0;
return ptr - ext_mem_base + LOWMEM_SIZE + HMASIZE;
}
/*
* NOTE: DPMI relies on realloc_mapping() _not_ changing the address ('addr'),
* when shrinking the memory region.
*/
static void *realloc_mapping_file(int cap, void *addr, size_t oldsize, size_t newsize)
{
Q__printf("MAPPING: realloc, cap=%s, addr=%p, oldsize=%zx, newsize=%zx\n",
cap, addr, oldsize, newsize);
if (cap & (MAPPING_EMS | MAPPING_DPMI)) {
int size = smget_area_size(&pgmpool, addr);
void *addr_;
if (!size || size != oldsize) return (void *)-1;
if (size == newsize) return addr;
/* NOTE: smrealloc() does not change addr,
* when shrinking the memory region.
*/
addr_ = smrealloc(&pgmpool, addr, newsize);
if (!addr_) {
Q_printf("MAPPING: pgrealloc(0x%p,0x%zx,) failed\n",
addr, newsize);
return (void *)-1;
}
return addr_;
}
return (void *)-1;
}
