Chloe M.
53 lines
796 B
C
53 lines
796 B
C
/*
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* Copyright (c) 2026, Chloe M.
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* Provided under the BSD-3 clause.
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*
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* Description: Spinlock primitive
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* Author: Chloe M.
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*/
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#include <ke/spinlock.h>
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#include <hal/prim.h>
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VOID KeSpinLockInit(SPINLOCK *Lock, const CHAR *Name)
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{
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if (Lock == NULL) {
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return;
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}
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Lock->Data = 0;
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}
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VOID
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KeSpinLockAcquire(SPINLOCK *Lock, BOOLEAN IrqMut)
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{
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IRQL LastIrql;
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if (Lock == NULL) {
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return;
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}
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if (IrqMut) {
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LastIrql = HalRaiseIrql(IRQL_CRITICAL);
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}
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/* Acquire the lock */
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while (HalCpuAswap(&Lock->Data, 1)) {
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HalCpuSpinWait();
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}
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if (IrqMut) {
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HalLowerIrql(LastIrql);
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}
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}
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VOID
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KeSpinLockRelease(SPINLOCK *Lock)
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{
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if (Lock == NULL) {
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return;
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}
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HalCpuAswap(&Lock->Data, 0);
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}
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