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Cross-platform spin lock implementation.

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This commit is contained in:
Skyth 2024-12-16 00:03:40 +03:00
parent d68e88314f
commit 58c8ed45e0
1 changed files with 20 additions and 6 deletions
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26
UnleashedRecomp/kernel/imports.cpp
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@ -695,15 +695,22 @@ void RtlRaiseException_x()
void KfReleaseSpinLock(uint32_t* spinLock) void KfReleaseSpinLock(uint32_t* spinLock)
{ {
InterlockedExchange((volatile long*)spinLock, 0); std::atomic_ref spinLockRef(*spinLock);
spinLockRef = 0;
} }
void KfAcquireSpinLock(uint32_t* spinLock) void KfAcquireSpinLock(uint32_t* spinLock)
{ {
const auto ctx = GetPPCContext(); std::atomic_ref spinLockRef(*spinLock);
while (true)
{
uint32_t expected = 0;
if (spinLockRef.compare_exchange_weak(expected, g_ppcContext->r13.u32))
break;
while (InterlockedCompareExchange((volatile long*)spinLock, ByteSwap(*(uint32_t*)(g_memory.Translate(ctx->r13.u32 + 0x110))), 0) != 0)
std::this_thread::yield(); std::this_thread::yield();
}
} }
uint64_t KeQueryPerformanceFrequency() uint64_t KeQueryPerformanceFrequency()
@ -735,15 +742,22 @@ void VdGetSystemCommandBuffer()
void KeReleaseSpinLockFromRaisedIrql(uint32_t* spinLock) void KeReleaseSpinLockFromRaisedIrql(uint32_t* spinLock)
{ {
InterlockedExchange((volatile long*)spinLock, 0); std::atomic_ref spinLockRef(*spinLock);
spinLockRef = 0;
} }
void KeAcquireSpinLockAtRaisedIrql(uint32_t* spinLock) void KeAcquireSpinLockAtRaisedIrql(uint32_t* spinLock)
{ {
const auto ctx = GetPPCContext(); std::atomic_ref spinLockRef(*spinLock);
while (true)
{
uint32_t expected = 0;
if (spinLockRef.compare_exchange_weak(expected, g_ppcContext->r13.u32))
break;
while (InterlockedCompareExchange((volatile long*)spinLock, ByteSwap(*(uint32_t*)(g_memory.Translate(ctx->r13.u32 + 0x110))), 0) != 0)
std::this_thread::yield(); std::this_thread::yield();
}
} }
uint32_t KiApcNormalRoutineNop() uint32_t KiApcNormalRoutineNop()