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Reorg medium_allocate

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svn: r15778
This commit is contained in:
Kevin Tew 2009-08-18 16:54:54 +00:00
parent 616224ace5
commit e000b13d22
1 changed files with 77 additions and 68 deletions
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145
src/mzscheme/gc2/newgc.c
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@ -580,18 +580,71 @@ static void *allocate_big(const size_t request_size_bytes, int type)
}
}
static void *allocate_medium(size_t sizeb, int type)
{
NewGC *gc;
int sz = 8, pos = 0, n;
void *addr, *p;
inline static mpage *create_new_medium_page(NewGC *gc, const int sz, const int pos) {
mpage *page;
objhead *info;
int n;
if (sizeb > (1 << (LOG_APAGE_SIZE - 1)))
return allocate_big(sizeb, type);
page = malloc_mpage();
page->addr = malloc_pages(gc, APAGE_SIZE, APAGE_SIZE);
page->size = sz;
page->size_class = 1;
page->page_type = PAGE_BIG;
page->previous_size = PREFIX_SIZE;
page->live_size = sz;
for (n = page->previous_size; ((n + sz) <= APAGE_SIZE); n += sz) {
objhead *info = (objhead *)PTR(NUM(page->addr) + n);
#ifdef MZ_USE_PLACES
memcpy(info, &GC_objhead_template, sizeof(objhead));
#endif
info->dead = 1;
info->size = gcBYTES_TO_WORDS(sz);
}
/* push page onto linked list */
page->next = gc->med_pages[pos];
if (page->next)
page->next->prev = page;
gc->med_pages[pos] = page;
gc->med_freelist_pages[pos] = page;
pagemap_add(gc->page_maps, page);
return page;
}
inline static void *medium_page_realloc_dead_slot(NewGC *gc, const int sz, const int pos, const int type) {
int n;
mpage *page;
for (page = gc->med_freelist_pages[pos]; page; page = gc->med_freelist_pages[pos] = page->prev) {
for (n = page->previous_size; ((n + sz) <= APAGE_SIZE); n += sz) {
objhead * info = (objhead *)PTR(NUM(page->addr) + n);
if (info->dead) {
void *p;
page->previous_size = (n + sz);
page->live_size += sz;
info->dead = 0;
info->type = type;
p = OBJHEAD_TO_OBJPTR(info);
memset(p, 0, sz - OBJHEAD_SIZE);
return p;
}
}
}
return 0;
}
static void *allocate_medium(const size_t request_size_bytes, const int type)
{
int sz = 8;
int pos = 0;
if (request_size_bytes > (1 << (LOG_APAGE_SIZE - 1)))
return allocate_big(request_size_bytes, type);
while (sz < sizeb) {
while (sz < request_size_bytes) {
sz <<= 1;
pos++;
}
@ -600,71 +653,27 @@ static void *allocate_medium(size_t sizeb, int type)
sz += OBJHEAD_SIZE; /* room for objhead */
sz = ALIGN_BYTES_SIZE(sz);
gc = GC_get_GC();
while (1) {
page = gc->med_freelist_pages[pos];
if (page) {
n = page->previous_size;
while (n <= (APAGE_SIZE - sz)) {
info = (objhead *)PTR(NUM(page->addr) + n);
if (info->dead) {
#ifdef MZ_USE_PLACES
info->owner = GC_objhead_template.owner;
//memcpy(info, &GC_objhead_template, sizeof(objhead));
#endif
info->dead = 0;
info->type = type;
page->previous_size = (n + sz);
page->live_size += sz;
p = OBJHEAD_TO_OBJPTR(info);
memset(p, 0, sz - OBJHEAD_SIZE);
return p;
}
n += sz;
}
gc->med_freelist_pages[pos] = page->prev;
} else
break;
}
page = malloc_mpage();
addr = malloc_pages(gc, APAGE_SIZE, APAGE_SIZE);
page->addr = addr;
page->size = sz;
page->size_class = 1;
page->page_type = PAGE_BIG;
page->previous_size = PREFIX_SIZE;
page->live_size = sz;
for (n = page->previous_size; (n + sz) <= APAGE_SIZE; n += sz) {
info = (objhead *)PTR(NUM(page->addr) + n);
#ifdef MZ_USE_PLACES
memcpy(info, &GC_objhead_template, sizeof(objhead));
#endif
info->dead = 1;
info->size = gcBYTES_TO_WORDS(sz);
}
page->next = gc->med_pages[pos];
if (page->next)
page->next->prev = page;
gc->med_pages[pos] = page;
gc->med_freelist_pages[pos] = page;
pagemap_add(gc->page_maps, page);
n = page->previous_size;
info = (objhead *)PTR(NUM(page->addr) + n);
info->dead = 0;
info->type = type;
{
void * objptr = OBJHEAD_TO_OBJPTR(info);
NewGC *gc = GC_get_GC();
void * objptr = medium_page_realloc_dead_slot(gc, sz, pos, type);
if (!objptr) {
mpage *page;
objhead *info;
page = create_new_medium_page(gc, sz, pos);
info = (objhead *)PTR(NUM(page->addr) + page->previous_size);
info->dead = 0;
info->type = type;
objptr = OBJHEAD_TO_OBJPTR(info);
}
ASSERT_VALID_OBJPTR(objptr);
return objptr;
}
}
inline static mpage *gen0_create_new_mpage(NewGC *gc) {
mpage *newmpage;