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Fix kernel memory allocator block coalescing (#1155)
* Fix kernel memory allocator block coalescing * Fix and move clear bit logic to a separate method
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1 changed files with 54 additions and 10 deletions
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@ -12,20 +12,68 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
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public int Order;
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public int NextOrder;
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public bool TryCoalesce(int index, int size)
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public bool TryCoalesce(int index, int count)
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{
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long mask = ((1L << size) - 1) << (index & 63);
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long mask = ((1L << count) - 1) << (index & 63);
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index /= 64;
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if ((mask & ~Masks[MaxLevel - 1][index]) != 0)
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if (count >= 64)
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{
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int remaining = count;
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int tempIdx = index;
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do
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{
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if (Masks[MaxLevel - 1][tempIdx++] != -1L)
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{
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return false;
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}
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Masks[MaxLevel - 1][index] &= ~mask;
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remaining -= 64;
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}
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while (remaining != 0);
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for (int level = MaxLevel - 2; level >= 0; level--, index /= 64)
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remaining = count;
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tempIdx = index;
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do
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{
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Masks[MaxLevel - 1][tempIdx] = 0;
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ClearMaskBit(MaxLevel - 2, tempIdx++);
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remaining -= 64;
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}
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while (remaining != 0);
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}
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else
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{
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long value = Masks[MaxLevel - 1][index];
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if ((mask & ~value) != 0)
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{
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return false;
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}
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value &= ~mask;
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Masks[MaxLevel - 1][index] = value;
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if (value == 0)
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{
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ClearMaskBit(MaxLevel - 2, index);
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}
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}
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FreeCount -= (ulong)count;
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return true;
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}
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public void ClearMaskBit(int startLevel, int index)
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{
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for (int level = startLevel; level >= 0; level--, index /= 64)
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{
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Masks[level][index / 64] &= ~(1L << (index & 63));
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@ -34,10 +82,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
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break;
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}
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}
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FreeCount -= (ulong)size;
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return true;
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}
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}
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}
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