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[Kernel] Implement KeTryToAcquireSpinLockAtRaisedIrql. Maybe correctly.

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gibbed 2019-08-04 11:36:31 -05:00
parent 68017eadea
commit 1ebf7bb484
1 changed files with 11 additions and 0 deletions
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11
src/xenia/kernel/xboxkrnl/xboxkrnl_threading.cc
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@ -922,6 +922,17 @@ void KeAcquireSpinLockAtRaisedIrql(lpdword_t lock_ptr) {
DECLARE_XBOXKRNL_EXPORT3(KeAcquireSpinLockAtRaisedIrql, kThreading,
kImplemented, kBlocking, kHighFrequency);
dword_t KeTryToAcquireSpinLockAtRaisedIrql(lpdword_t lock_ptr) {
// Lock.
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());
if (!xe::atomic_cas(0, 1, lock)) {
return 0;
}
return 1;
}
DECLARE_XBOXKRNL_EXPORT4(KeTryToAcquireSpinLockAtRaisedIrql, kThreading,
kImplemented, kBlocking, kHighFrequency, kSketchy);
void KeReleaseSpinLockFromRaisedIrql(lpdword_t lock_ptr) {
// Unlock.
auto lock = reinterpret_cast<uint32_t*>(lock_ptr.host_address());