kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-08-24 16:24:47 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

first version that passes the make test

Browse source
This commit is contained in:
daanx 2024-11-30 20:21:32 -08:00
parent 55b70f1588
commit 9ebe941ce0
10 changed files with 155 additions and 91 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/page-map.c
View file

@ -37,7 +37,8 @@ static bool mi_page_map_init(void) {
// commit the first part so NULL pointers get resolved without an access violation
if (!mi_page_map_all_committed) {
_mi_os_commit(_mi_page_map, _mi_os_page_size(), NULL, NULL);
_mi_page_map[0] = -1; // so _mi_ptr_page(NULL) == NULL
_mi_page_map[0] = 1; // so _mi_ptr_page(NULL) == NULL
mi_assert_internal(_mi_ptr_page(NULL)==NULL);
}
return true;
}
@ -60,9 +61,9 @@ static void mi_page_map_ensure_committed(size_t idx, size_t slice_count) {
static size_t mi_page_map_get_idx(mi_page_t* page, uint8_t** page_start, size_t* slice_count) {
size_t page_size;
*page_start = mi_page_area(page, &page_size);
if (page_size > MI_LARGE_PAGE_SIZE) { page_size = MI_LARGE_PAGE_SIZE; } // furthest interior pointer
*slice_count = mi_slice_count_of_size(page_size);
return ((uintptr_t)*page_start >> MI_ARENA_SLICE_SHIFT);
if (page_size > MI_LARGE_PAGE_SIZE) { page_size = MI_LARGE_PAGE_SIZE - MI_ARENA_SLICE_SIZE; } // furthest interior pointer
*slice_count = mi_slice_count_of_size(page_size) + (((uint8_t*)*page_start - (uint8_t*)page)/MI_ARENA_SLICE_SIZE); // add for large aligned blocks
return ((uintptr_t)page >> MI_ARENA_SLICE_SHIFT);
}
@ -79,9 +80,9 @@ void _mi_page_map_register(mi_page_t* page) {
mi_page_map_ensure_committed(idx, slice_count);
// set the offsets
for (int i = 0; i < (int)slice_count; i++) {
for (size_t i = 0; i < slice_count; i++) {
mi_assert_internal(i < 128);
_mi_page_map[idx + i] = (i+1);
_mi_page_map[idx + i] = (uint8_t)(i+1);
}
}