struct page* region_get_mem(size_t s)
{
size_t request_bytes;
void *mem;
struct page *newp;
/* Don't get less than K * RPAGESIZE extra memory (K * RPAGESIZE
* is the minimum useful size for something on unused_pages) */
if ( (unsigned long)s + (unsigned long)K * RPAGESIZE <
(unsigned long)MINIMUM_MEM_REQUEST )
request_bytes = MINIMUM_MEM_REQUEST;
else
request_bytes = s;
mem = malloc(request_bytes + RPAGESIZE);
if (!mem)
return NULL;
newp = PALIGN(mem, RPAGESIZE);
if (mem == newp) /* Maybe we were lucky! */
request_bytes += RPAGESIZE;
#ifndef NMEMDEBUG
set_region_range(newp, (char*)newp + request_bytes, FREEPAGE);
#endif /* ifndef NMEMDEBUG */
total_page_count += request_bytes >> RPAGELOG; /* this should be atomic
* */
newp->pagecount = request_bytes >> RPAGELOG;
newp->free = 1;
return newp;
}
struct page* region_get_mem(size_t s)
{
struct page *newp, *tmp;
#if 0
s = ALIGN(s, 65536);
#endif /* if 0 */
newp = (struct page*)MMAP(0, s, PROT_READ | PROT_WRITE, MAP_PRIVATE);
if (!newp)
return NULL;
if (PALIGN(newp, RPAGESIZE) != newp)
abort();
/* Add the new memory to unused_pages */
#ifndef NMEMDEBUG
set_region_range(newp, (char*)newp + s, FREEPAGE);
#endif /* ifndef NMEMDEBUG */
total_page_count += s >> RPAGELOG; /* This should be atomic */
newp->pagecount = s >> RPAGELOG;
newp->free = 1;
return newp;
}
struct page *region_get_mem(size_t s)
{
size_t request_bytes;
void *mem;
struct page *newp;
/* Don't get less than K * RPAGESIZE extra memory (K * RPAGESIZE
is the minimum useful size for something on unused_pages) */
if (s + K * RPAGESIZE < MINIMUM_MEM_REQUEST)
request_bytes = MINIMUM_MEM_REQUEST;
else
request_bytes = s;
#if 0
request_bytes = ALIGN(request_bytes, 65536);
#endif
mem = (struct page *)MMAP(0, request_bytes+RPAGESIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE);
if (!mem) { out_of_memory(); abort(); }
VALGRIND_MALLOCLIKE_BLOCK(mem, request_bytes+RPAGESIZE, 0, 0);
// VALGRIND_MAKE_NOACCESS(mem, request_bytes+RPAGESIZE);
newp = PALIGN(mem, RPAGESIZE);
VALGRIND_MAKE_WRITABLE(newp, sizeof(struct page));
memset(newp, 0, sizeof(struct page));
if (mem == newp) /* Maybe we were lucky! */
request_bytes += RPAGESIZE;
addbyaddress(newp);
/* Add the new memory to unused_pages */
#ifndef NMEMDEBUG
set_region_range(newp, (char *)newp + s, FREEPAGE);
#endif
total_page_count += request_bytes >> RPAGELOG;
newp->pagecount = request_bytes >> RPAGELOG;
assert(newp->pagecount > 0);
newp->free = 1;
addfront(&unused_pages, newp);
return newp;
}
struct page *region_get_mem(size_t s)
{
size_t request_bytes;
void *mem;
struct page *newp;
/* Don't get less than K * RPAGESIZE extra memory (K * RPAGESIZE
is the minimum useful size for something on unused_pages) */
if (s + K * RPAGESIZE < MINIMUM_MEM_REQUEST)
request_bytes = MINIMUM_MEM_REQUEST;
else
request_bytes = s;
mem = xmalloc(request_bytes + RPAGESIZE);
// memset(mem, 0, request_bytes + RPAGESIZE);
// VALGRIND_MAKE_NOACCESS(mem, request_bytes + RPAGESIZE);
newp = PALIGN(mem, RPAGESIZE);
// fprintf(stderr, "## region_get_mem: s=%d, request_bytes=%d, mem=%p, newp=%p\n", s, request_bytes, mem, newp);
// VALGRIND_MAKE_WRITABLE(newp, sizeof(struct page));
memset(newp, 0, sizeof(struct page));
if (mem == newp) /* Maybe we were lucky! */
request_bytes += RPAGESIZE;
addbyaddress(newp);
/* Add the new memory to unused_pages */
#ifndef NMEMDEBUG
set_region_range(newp, (char *)newp + request_bytes, FREEPAGE);
#endif
total_page_count += request_bytes >> RPAGELOG;
newp->pagecount = request_bytes >> RPAGELOG;
assert(newp->pagecount > 0);
newp->free = 1;
addfront(&unused_pages, newp);
return newp;
}
