aboutsummaryrefslogtreecommitdiff
path: root/Ryujinx.Memory/Tracking/ConcurrentBitmap.cs
diff options
context:
space:
mode:
authorTSR Berry <20988865+TSRBerry@users.noreply.github.com>2023-04-08 01:22:00 +0200
committerMary <thog@protonmail.com>2023-04-27 23:51:14 +0200
commitcee712105850ac3385cd0091a923438167433f9f (patch)
tree4a5274b21d8b7f938c0d0ce18736d3f2993b11b1 /Ryujinx.Memory/Tracking/ConcurrentBitmap.cs
parentcd124bda587ef09668a971fa1cac1c3f0cfc9f21 (diff)
Move solution and projects to src
Diffstat (limited to 'Ryujinx.Memory/Tracking/ConcurrentBitmap.cs')
-rw-r--r--Ryujinx.Memory/Tracking/ConcurrentBitmap.cs152
1 files changed, 0 insertions, 152 deletions
diff --git a/Ryujinx.Memory/Tracking/ConcurrentBitmap.cs b/Ryujinx.Memory/Tracking/ConcurrentBitmap.cs
deleted file mode 100644
index 994fda92..00000000
--- a/Ryujinx.Memory/Tracking/ConcurrentBitmap.cs
+++ /dev/null
@@ -1,152 +0,0 @@
-using System;
-using System.Threading;
-
-namespace Ryujinx.Memory.Tracking
-{
- /// <summary>
- /// A bitmap that can be safely modified from multiple threads.
- /// </summary>
- internal class ConcurrentBitmap
- {
- public const int IntSize = 64;
-
- public const int IntShift = 6;
- public const int IntMask = IntSize - 1;
-
- /// <summary>
- /// Masks representing the bitmap. Least significant bit first, 64-bits per mask.
- /// </summary>
- public readonly long[] Masks;
-
- /// <summary>
- /// Create a new multithreaded bitmap.
- /// </summary>
- /// <param name="count">The number of bits to reserve</param>
- /// <param name="set">Whether the bits should be initially set or not</param>
- public ConcurrentBitmap(int count, bool set)
- {
- Masks = new long[(count + IntMask) / IntSize];
-
- if (set)
- {
- Array.Fill(Masks, -1L);
- }
- }
-
- /// <summary>
- /// Check if any bit in the bitmap is set.
- /// </summary>
- /// <returns>True if any bits are set, false otherwise</returns>
- public bool AnySet()
- {
- for (int i = 0; i < Masks.Length; i++)
- {
- if (Interlocked.Read(ref Masks[i]) != 0)
- {
- return true;
- }
- }
-
- return false;
- }
-
- /// <summary>
- /// Check if a bit in the bitmap is set.
- /// </summary>
- /// <param name="bit">The bit index to check</param>
- /// <returns>True if the bit is set, false otherwise</returns>
- public bool IsSet(int bit)
- {
- int wordIndex = bit >> IntShift;
- int wordBit = bit & IntMask;
-
- long wordMask = 1L << wordBit;
-
- return (Interlocked.Read(ref Masks[wordIndex]) & wordMask) != 0;
- }
-
- /// <summary>
- /// Check if any bit in a range of bits in the bitmap are set. (inclusive)
- /// </summary>
- /// <param name="start">The first bit index to check</param>
- /// <param name="end">The last bit index to check</param>
- /// <returns>True if a bit is set, false otherwise</returns>
- public bool IsSet(int start, int end)
- {
- if (start == end)
- {
- return IsSet(start);
- }
-
- int startIndex = start >> IntShift;
- int startBit = start & IntMask;
- long startMask = -1L << startBit;
-
- int endIndex = end >> IntShift;
- int endBit = end & IntMask;
- long endMask = (long)(ulong.MaxValue >> (IntMask - endBit));
-
- long startValue = Interlocked.Read(ref Masks[startIndex]);
-
- if (startIndex == endIndex)
- {
- return (startValue & startMask & endMask) != 0;
- }
-
- if ((startValue & startMask) != 0)
- {
- return true;
- }
-
- for (int i = startIndex + 1; i < endIndex; i++)
- {
- if (Interlocked.Read(ref Masks[i]) != 0)
- {
- return true;
- }
- }
-
- long endValue = Interlocked.Read(ref Masks[endIndex]);
-
- if ((endValue & endMask) != 0)
- {
- return true;
- }
-
- return false;
- }
-
- /// <summary>
- /// Set a bit at a specific index to either true or false.
- /// </summary>
- /// <param name="bit">The bit index to set</param>
- /// <param name="value">Whether the bit should be set or not</param>
- public void Set(int bit, bool value)
- {
- int wordIndex = bit >> IntShift;
- int wordBit = bit & IntMask;
-
- long wordMask = 1L << wordBit;
-
- if (value)
- {
- Interlocked.Or(ref Masks[wordIndex], wordMask);
- }
- else
- {
- Interlocked.And(ref Masks[wordIndex], ~wordMask);
- }
- }
-
- /// <summary>
- /// Clear the bitmap entirely, setting all bits to 0.
- /// </summary>
- public void Clear()
- {
- for (int i = 0; i < Masks.Length; i++)
- {
- Interlocked.Exchange(ref Masks[i], 0);
- }
- }
- }
-}