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Kernel: Specify default memory order for some non-synchronizing Atomics

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Tom 2021-01-03 16:58:50 -07:00 • committed by Andreas Kling
parent fb84f0ec9c
commit 901ef3f1c8
12 changed files with 44 additions and 43 deletions
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12
Kernel/Heap/SlabAllocator.cpp
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@ -51,7 +51,7 @@ public:
}
slabs[0].next = nullptr;
m_freelist = &slabs[m_slab_count - 1];
m_num_allocated.store(0, AK::MemoryOrder::memory_order_release);
m_num_allocated = 0;
}
constexpr size_t slab_size() const { return templated_slab_size; }
@ -75,7 +75,7 @@ public:
next_free = free_slab->next;
} while (!m_freelist.compare_exchange_strong(free_slab, next_free, AK::memory_order_acq_rel));
m_num_allocated.fetch_add(1, AK::MemoryOrder::memory_order_acq_rel);
m_num_allocated++;
}
#ifdef SANITIZE_SLABS
@ -104,11 +104,11 @@ public:
free_slab->next = next_free;
} while (!m_freelist.compare_exchange_strong(next_free, free_slab, AK::memory_order_acq_rel));
m_num_allocated.fetch_sub(1, AK::MemoryOrder::memory_order_acq_rel);
m_num_allocated--;
}
size_t num_allocated() const { return m_num_allocated.load(AK::MemoryOrder::memory_order_consume); }
size_t num_free() const { return m_slab_count - m_num_allocated.load(AK::MemoryOrder::memory_order_consume); }
size_t num_allocated() const { return m_num_allocated; }
size_t num_free() const { return m_slab_count - m_num_allocated; }
private:
struct FreeSlab {
@ -117,7 +117,7 @@ private:
};
Atomic<FreeSlab*> m_freelist { nullptr };
Atomic<ssize_t> m_num_allocated;
Atomic<ssize_t, AK::MemoryOrder::memory_order_relaxed> m_num_allocated;
size_t m_slab_count;
void* m_base { nullptr };
void* m_end { nullptr };