mirror of
https://github.com/Ryujinx/Ryujinx.git
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* Implement a new physical memory manager and replace DeviceMemory * Proper generic constraints * Fix debug build * Add memory tests * New CPU memory manager and general code cleanup * Remove host memory management from CPU project, use Ryujinx.Memory instead * Fix tests * Document exceptions on MemoryBlock * Fix leak on unix memory allocation * Proper disposal of some objects on tests * Fix JitCache not being set as initialized * GetRef without checks for 8-bits and 16-bits CAS * Add MemoryBlock destructor * Throw in separate method to improve codegen * Address PR feedback * QueryModified improvements * Fix memory write tracking not marking all pages as modified in some cases * Simplify MarkRegionAsModified * Remove XML doc for ghost param * Add back optimization to avoid useless buffer updates * Add Ryujinx.Cpu project, move MemoryManager there and remove MemoryBlockWrapper * Some nits * Do not perform address translation when size is 0 * Address PR feedback and format NativeInterface class * Remove ghost parameter description * Update Ryujinx.Cpu to .NET Core 3.1 * Address PR feedback * Fix build * Return a well defined value for GetPhysicalAddress with invalid VA, and do not return unmapped ranges as modified * Typo
54 lines
1.6 KiB
C#
54 lines
1.6 KiB
C#
using System;
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namespace ARMeilleure.Memory
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{
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class ReservedRegion
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{
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private const int DefaultGranularity = 65536; // Mapping granularity in Windows.
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public IJitMemoryBlock Block { get; }
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public IntPtr Pointer => Block.Pointer;
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private readonly ulong _maxSize;
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private readonly ulong _sizeGranularity;
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private ulong _currentSize;
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public ReservedRegion(IJitMemoryAllocator allocator, ulong maxSize, ulong granularity = 0)
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{
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if (granularity == 0)
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{
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granularity = DefaultGranularity;
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}
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Block = allocator.Reserve(maxSize);
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_maxSize = maxSize;
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_sizeGranularity = granularity;
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_currentSize = 0;
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}
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public void ExpandIfNeeded(ulong desiredSize)
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{
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if (desiredSize > _maxSize)
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{
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throw new OutOfMemoryException();
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}
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if (desiredSize > _currentSize)
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{
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// Lock, and then check again. We only want to commit once.
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lock (this)
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{
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if (desiredSize >= _currentSize)
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{
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ulong overflowBytes = desiredSize - _currentSize;
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ulong moreToCommit = (((_sizeGranularity - 1) + overflowBytes) / _sizeGranularity) * _sizeGranularity; // Round up.
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Block.Commit(_currentSize, moreToCommit);
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_currentSize += moreToCommit;
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}
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}
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}
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}
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}
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}
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