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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 1998-2008
*
* Compacting garbage collector
*
* Documentation on the architecture of the Garbage Collector can be
* found in the online commentary:
*
* https://gitlab.haskell.org/ghc/ghc/wikis/commentary/rts/storage/gc
*
* ---------------------------------------------------------------------------*/
#pragma once
#include "BeginPrivate.h"
INLINE_HEADER void
mark(StgPtr p, bdescr *bd)
{
uint32_t offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / BITS_IN(W_));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (BITS_IN(W_) - 1));
*bitmap_word |= bit_mask;
}
INLINE_HEADER void
unmark(StgPtr p, bdescr *bd)
{
uint32_t offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / BITS_IN(W_));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (BITS_IN(W_) - 1));
*bitmap_word &= ~bit_mask;
}
INLINE_HEADER StgWord
is_marked(StgPtr p, bdescr *bd)
{
uint32_t offset_within_block = p - bd->start; // in words
StgPtr bitmap_word = (StgPtr)bd->u.bitmap +
(offset_within_block / BITS_IN(W_));
StgWord bit_mask = (StgWord)1 << (offset_within_block & (BITS_IN(W_)- 1));
return (*bitmap_word & bit_mask);
}
void compact (StgClosure *static_objects,
StgWeak **dead_weak_ptr_list,
StgTSO **resurrected_threads);
#include "EndPrivate.h"
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