1 files changed, 75 insertions, 0 deletions
diff --git a/src/core/hle/service/am/service/lock_accessor.cpp b/src/core/hle/service/am/service/lock_accessor.cpp
new file mode 100644
index 000000000..8e556fdd6
--- /dev/null
+++ b/src/core/hle/service/am/service/lock_accessor.cpp
@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/am/service/lock_accessor.h"
+#include "core/hle/service/cmif_serialization.h"
+
+namespace Service::AM {
+
+ILockAccessor::ILockAccessor(Core::System& system_)
+    : ServiceFramework{system_, "ILockAccessor"}, m_context{system_, "ILockAccessor"},
+      m_event{m_context} {
+    // clang-format off
+    static const FunctionInfo functions[] = {
+        {1, D<&ILockAccessor::TryLock>, "TryLock"},
+        {2, D<&ILockAccessor::Unlock>, "Unlock"},
+        {3, D<&ILockAccessor::GetEvent>, "GetEvent"},
+        {4, D<&ILockAccessor::IsLocked>, "IsLocked"},
+    };
+    // clang-format on
+
+    RegisterHandlers(functions);
+
+    m_event.Signal();
+}
+
+ILockAccessor::~ILockAccessor() = default;
+
+Result ILockAccessor::TryLock(Out<bool> out_is_locked,
+                              OutCopyHandle<Kernel::KReadableEvent> out_handle,
+                              bool return_handle) {
+    LOG_INFO(Service_AM, "called, return_handle={}", return_handle);
+
+    {
+        std::scoped_lock lk{m_mutex};
+        if (m_is_locked) {
+            *out_is_locked = false;
+        } else {
+            m_is_locked = true;
+            *out_is_locked = true;
+        }
+    }
+
+    if (return_handle) {
+        *out_handle = m_event.GetHandle();
+    }
+
+    R_SUCCEED();
+}
+
+Result ILockAccessor::Unlock() {
+    LOG_INFO(Service_AM, "called");
+
+    {
+        std::scoped_lock lk{m_mutex};
+        m_is_locked = false;
+    }
+
+    m_event.Signal();
+    R_SUCCEED();
+}
+
+Result ILockAccessor::GetEvent(OutCopyHandle<Kernel::KReadableEvent> out_handle) {
+    LOG_INFO(Service_AM, "called");
+    *out_handle = m_event.GetHandle();
+    R_SUCCEED();
+}
+
+Result ILockAccessor::IsLocked(Out<bool> out_is_locked) {
+    LOG_INFO(Service_AM, "called");
+    std::scoped_lock lk{m_mutex};
+    *out_is_locked = m_is_locked;
+    R_SUCCEED();
+}
+
+} // namespace Service::AM