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Use standard _Atomic declarations and clean up atomic operations

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This commit is contained in:
daan 2019-08-25 22:59:12 -07:00
parent b86c851cca
commit e8664001f7
9 changed files with 165 additions and 159 deletions
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12
src/segment.c
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@ -542,8 +542,8 @@ void _mi_segment_page_free(mi_page_t* page, bool force, mi_segments_tld_t* tld)
// live blocks (reached through other threads). Such segments
// are "abandoned" and will be reclaimed by other threads to
// reuse their pages and/or free them eventually
static volatile mi_segment_t* abandoned = NULL;
static volatile uintptr_t abandoned_count = 0;
static volatile _Atomic(mi_segment_t*) abandoned; // = NULL;
static volatile _Atomic(uintptr_t) abandoned_count; // = 0;
static void mi_segment_abandon(mi_segment_t* segment, mi_segments_tld_t* tld) {
mi_assert_internal(segment->used == segment->abandoned);
@ -561,9 +561,9 @@ static void mi_segment_abandon(mi_segment_t* segment, mi_segments_tld_t* tld) {
segment->thread_id = 0;
mi_segment_t* next;
do {
next = (mi_segment_t*)abandoned;
mi_atomic_write_ptr((volatile void**)&segment->abandoned_next, next);
} while (!mi_atomic_compare_exchange_ptr((volatile void**)&abandoned, segment, next));
next = (mi_segment_t*)mi_atomic_read_ptr_relaxed(mi_atomic_cast(void*,&abandoned));
mi_atomic_write_ptr(mi_atomic_cast(void*,&segment->abandoned_next), next);
} while (!mi_atomic_cas_ptr_weak(mi_atomic_cast(void*,&abandoned), segment, next));
mi_atomic_increment(&abandoned_count);
}
@ -597,7 +597,7 @@ bool _mi_segment_try_reclaim_abandoned( mi_heap_t* heap, bool try_all, mi_segmen
mi_segment_t* segment;
do {
segment = (mi_segment_t*)abandoned;
} while(segment != NULL && !mi_atomic_compare_exchange_ptr((volatile void**)&abandoned, (mi_segment_t*)segment->abandoned_next, segment));
} while(segment != NULL && !mi_atomic_cas_ptr_weak(mi_atomic_cast(void*,&abandoned), (mi_segment_t*)segment->abandoned_next, segment));
if (segment==NULL) break; // stop early if no more segments available
// got it.