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[Kernel] Return largest available direct-memory span (#334)

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This commit is contained in:
Zaid Yousef
2026-07-18 02:38:39 +03:00
committed by GitHub
parent ff3ac0bba1
commit cc290f860b
2 changed files with 132 additions and 7 deletions
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src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs
+31 -7
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@@ -2459,7 +2459,20 @@ public static partial class KernelMemoryCompatExports
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_INVALID_ARGUMENT;
}
if (!TryFindAvailableDirectMemorySpanLocked(searchStart, searchEnd, alignment, out var candidate, out var rangeAvailable))
bool foundSpan;
ulong candidate;
ulong rangeAvailable;
lock (_memoryGate)
{
foundSpan = TryFindAvailableDirectMemorySpanLocked(
searchStart,
searchEnd,
alignment,
out candidate,
out rangeAvailable);
}
if (!foundSpan)
{
return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_NOT_FOUND;
}
@@ -5909,9 +5922,12 @@ public static partial class KernelMemoryCompatExports
var gapEnd = Math.Min(allocation.Start, effectiveEnd);
if (candidate < gapEnd)
{
spanStart = candidate;
spanLength = gapEnd - candidate;
return true;
var candidateLength = gapEnd - candidate;
if (candidateLength > spanLength)
{
spanStart = candidate;
spanLength = candidateLength;
}
}
if (allocation.Start >= effectiveEnd)
@@ -5922,12 +5938,20 @@ public static partial class KernelMemoryCompatExports
candidate = AlignUp(Math.Max(candidate, allocationEnd), alignment);
if (candidate >= effectiveEnd)
{
return false;
break;
}
}
if (candidate < effectiveEnd)
{
var candidateLength = effectiveEnd - candidate;
if (candidateLength > spanLength)
{
spanStart = candidate;
spanLength = candidateLength;
}
}
spanStart = candidate;
spanLength = effectiveEnd - candidate;
return spanLength != 0;
}