1 files changed, 57 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_lock.cpp b/src/core/hle/kernel/svc/svc_lock.cpp
new file mode 100644
index 000000000..45f2a6553
--- /dev/null
+++ b/src/core/hle/kernel/svc/svc_lock.cpp
@@ -0,0 +1,57 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/core.h"
+#include "core/hle/kernel/k_memory_layout.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/svc.h"
+
+namespace Kernel::Svc {
+
+/// Attempts to locks a mutex
+Result ArbitrateLock(Core::System& system, Handle thread_handle, VAddr address, u32 tag) {
+    LOG_TRACE(Kernel_SVC, "called thread_handle=0x{:08X}, address=0x{:X}, tag=0x{:08X}",
+              thread_handle, address, tag);
+
+    // Validate the input address.
+    if (IsKernelAddress(address)) {
+        LOG_ERROR(Kernel_SVC, "Attempting to arbitrate a lock on a kernel address (address={:08X})",
+                  address);
+        return ResultInvalidCurrentMemory;
+    }
+    if (!Common::IsAligned(address, sizeof(u32))) {
+        LOG_ERROR(Kernel_SVC, "Input address must be 4 byte aligned (address: {:08X})", address);
+        return ResultInvalidAddress;
+    }
+
+    return system.Kernel().CurrentProcess()->WaitForAddress(thread_handle, address, tag);
+}
+
+Result ArbitrateLock32(Core::System& system, Handle thread_handle, u32 address, u32 tag) {
+    return ArbitrateLock(system, thread_handle, address, tag);
+}
+
+/// Unlock a mutex
+Result ArbitrateUnlock(Core::System& system, VAddr address) {
+    LOG_TRACE(Kernel_SVC, "called address=0x{:X}", address);
+
+    // Validate the input address.
+    if (IsKernelAddress(address)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Attempting to arbitrate an unlock on a kernel address (address={:08X})",
+                  address);
+        return ResultInvalidCurrentMemory;
+    }
+    if (!Common::IsAligned(address, sizeof(u32))) {
+        LOG_ERROR(Kernel_SVC, "Input address must be 4 byte aligned (address: {:08X})", address);
+        return ResultInvalidAddress;
+    }
+
+    return system.Kernel().CurrentProcess()->SignalToAddress(address);
+}
+
+Result ArbitrateUnlock32(Core::System& system, u32 address) {
+    return ArbitrateUnlock(system, address);
+}
+
+} // namespace Kernel::Svc