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using Ryujinx.Memory.Range;
namespace Ryujinx.Memory.Tracking
{
/// <summary>
/// A region of memory.
/// </summary>
abstract class AbstractRegion : INonOverlappingRange
{
/// <summary>
/// Base address.
/// </summary>
public ulong Address { get; }
/// <summary>
/// Size of the range in bytes.
/// </summary>
public ulong Size { get; protected set; }
/// <summary>
/// End address.
/// </summary>
public ulong EndAddress => Address + Size;
/// <summary>
/// Create a new region.
/// </summary>
/// <param name="address">Base address</param>
/// <param name="size">Size of the range</param>
protected AbstractRegion(ulong address, ulong size)
{
Address = address;
Size = size;
}
/// <summary>
/// Check if this range overlaps with another.
/// </summary>
/// <param name="address">Base address</param>
/// <param name="size">Size of the range</param>
/// <returns>True if overlapping, false otherwise</returns>
public bool OverlapsWith(ulong address, ulong size)
{
return Address < address + size && address < EndAddress;
}
/// <summary>
/// Signals to the handles that a memory event has occurred, and unprotects the region. Assumes that the tracking lock has been obtained.
/// </summary>
/// <param name="address">Address accessed</param>
/// <param name="size">Size of the region affected in bytes</param>
/// <param name="write">Whether the region was written to or read</param>
/// <param name="exemptId">Optional ID of the handles that should not be signalled</param>
public abstract void Signal(ulong address, ulong size, bool write, int? exemptId);
/// <summary>
/// Signals to the handles that a precise memory event has occurred. Assumes that the tracking lock has been obtained.
/// </summary>
/// <param name="address">Address accessed</param>
/// <param name="size">Size of the region affected in bytes</param>
/// <param name="write">Whether the region was written to or read</param>
/// <param name="exemptId">Optional ID of the handles that should not be signalled</param>
public abstract void SignalPrecise(ulong address, ulong size, bool write, int? exemptId);
/// <summary>
/// Split this region into two, around the specified address.
/// This region is updated to end at the split address, and a new region is created to represent past that point.
/// </summary>
/// <param name="splitAddress">Address to split the region around</param>
/// <returns>The second part of the split region, with start address at the given split.</returns>
public abstract INonOverlappingRange Split(ulong splitAddress);
}
}
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