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move keys field in the page struct to keep offsets in the fast path the same for different build variants

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Daan Leijen 2022-11-18 10:14:37 -08:00
parent 8834e128e8
commit 18cf94dff6
2 changed files with 7 additions and 6 deletions
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7
include/mimalloc-types.h
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@ -271,13 +271,14 @@ typedef struct mi_page_s {
uint8_t retire_expire:7; // expiration count for retired blocks uint8_t retire_expire:7; // expiration count for retired blocks
mi_block_t* free; // list of available free blocks (`malloc` allocates from this list) mi_block_t* free; // list of available free blocks (`malloc` allocates from this list)
uint32_t used; // number of blocks in use (including blocks in `local_free` and `thread_free`)
uint32_t xblock_size; // size available in each block (always `>0`)
mi_block_t* local_free; // list of deferred free blocks by this thread (migrates to `free`)
#ifdef MI_ENCODE_FREELIST #ifdef MI_ENCODE_FREELIST
uintptr_t keys[2]; // two random keys to encode the free lists (see `_mi_block_next`) uintptr_t keys[2]; // two random keys to encode the free lists (see `_mi_block_next`)
#endif #endif
uint32_t used; // number of blocks in use (including blocks in `local_free` and `thread_free`)
uint32_t xblock_size; // size available in each block (always `>0`)
mi_block_t* local_free; // list of deferred free blocks by this thread (migrates to `free`)
_Atomic(mi_thread_free_t) xthread_free; // list of deferred free blocks freed by other threads _Atomic(mi_thread_free_t) xthread_free; // list of deferred free blocks freed by other threads
_Atomic(uintptr_t) xheap; _Atomic(uintptr_t) xheap;

6
src/init.c
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@ -19,12 +19,12 @@ const mi_page_t _mi_page_empty = {
false, // is_zero false, // is_zero
0, // retire_expire 0, // retire_expire
NULL, // free NULL, // free
#if MI_ENCODE_FREELIST
{ 0, 0 },
#endif
0, // used 0, // used
0, // xblock_size 0, // xblock_size
NULL, // local_free NULL, // local_free
#if MI_ENCODE_FREELIST
{ 0, 0 },
#endif
MI_ATOMIC_VAR_INIT(0), // xthread_free MI_ATOMIC_VAR_INIT(0), // xthread_free
MI_ATOMIC_VAR_INIT(0), // xheap MI_ATOMIC_VAR_INIT(0), // xheap
NULL, NULL NULL, NULL