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daan 2021-11-13 15:16:23 -08:00
commit 83ffd92b2b
8 changed files with 86 additions and 85 deletions
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src/bitmap.h
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@ -7,7 +7,7 @@ terms of the MIT license. A copy of the license can be found in the file
/* ----------------------------------------------------------------------------
Concurrent bitmap that can set/reset sequences of bits atomically,
represeted as an array of fields where each field is a machine word (`uintptr_t`)
represeted as an array of fields where each field is a machine word (`size_t`)
There are two api's; the standard one cannot have sequences that cross
between the bitmap fields (and a sequence must be <= MI_BITMAP_FIELD_BITS).
@ -24,11 +24,11 @@ between the fields. (This is used in arena allocation)
Bitmap definition
----------------------------------------------------------- */
#define MI_BITMAP_FIELD_BITS (8*MI_INTPTR_SIZE)
#define MI_BITMAP_FIELD_FULL (~((uintptr_t)0)) // all bits set
#define MI_BITMAP_FIELD_BITS (8*MI_SIZE_SIZE)
#define MI_BITMAP_FIELD_FULL (~((size_t)0)) // all bits set
// An atomic bitmap of `uintptr_t` fields
typedef _Atomic(uintptr_t) mi_bitmap_field_t;
// An atomic bitmap of `size_t` fields
typedef _Atomic(size_t) mi_bitmap_field_t;
typedef mi_bitmap_field_t* mi_bitmap_t;
// A bitmap index is the index of the bit in a bitmap.