From 1773a1039f7422df4faac08aa366b6a6bbd645e4 Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Thu, 16 Feb 2023 23:16:08 -0500
Subject: kernel: add KObjectName

---
 src/core/hle/kernel/k_object_name.cpp | 102 ++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 src/core/hle/kernel/k_object_name.cpp

(limited to 'src/core/hle/kernel/k_object_name.cpp')

diff --git a/src/core/hle/kernel/k_object_name.cpp b/src/core/hle/kernel/k_object_name.cpp
new file mode 100644
index 000000000..df3a1c4c5
--- /dev/null
+++ b/src/core/hle/kernel/k_object_name.cpp
@@ -0,0 +1,102 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/kernel/k_object_name.h"
+
+namespace Kernel {
+
+KObjectNameGlobalData::KObjectNameGlobalData(KernelCore& kernel) : m_object_list_lock{kernel} {}
+KObjectNameGlobalData::~KObjectNameGlobalData() = default;
+
+void KObjectName::Initialize(KAutoObject* obj, const char* name) {
+    // Set member variables.
+    m_object = obj;
+    std::strncpy(m_name.data(), name, sizeof(m_name) - 1);
+    m_name[sizeof(m_name) - 1] = '\x00';
+
+    // Open a reference to the object we hold.
+    m_object->Open();
+}
+
+bool KObjectName::MatchesName(const char* name) const {
+    return std::strncmp(m_name.data(), name, sizeof(m_name)) == 0;
+}
+
+Result KObjectName::NewFromName(KernelCore& kernel, KAutoObject* obj, const char* name) {
+    // Create a new object name.
+    KObjectName* new_name = KObjectName::Allocate(kernel);
+    R_UNLESS(new_name != nullptr, ResultOutOfResource);
+
+    // Initialize the new name.
+    new_name->Initialize(obj, name);
+
+    // Check if there's an existing name.
+    {
+        // Get the global data.
+        KObjectNameGlobalData& gd{kernel.ObjectNameGlobalData()};
+
+        // Ensure we have exclusive access to the global list.
+        KScopedLightLock lk{gd.GetObjectListLock()};
+
+        // If the object doesn't exist, put it into the list.
+        KScopedAutoObject existing_object = FindImpl(kernel, name);
+        if (existing_object.IsNull()) {
+            gd.GetObjectList().push_back(*new_name);
+            R_SUCCEED();
+        }
+    }
+
+    // The object already exists, which is an error condition. Perform cleanup.
+    obj->Close();
+    KObjectName::Free(kernel, new_name);
+    R_THROW(ResultInvalidState);
+}
+
+Result KObjectName::Delete(KernelCore& kernel, KAutoObject* obj, const char* compare_name) {
+    // Get the global data.
+    KObjectNameGlobalData& gd{kernel.ObjectNameGlobalData()};
+
+    // Ensure we have exclusive access to the global list.
+    KScopedLightLock lk{gd.GetObjectListLock()};
+
+    // Find a matching entry in the list, and delete it.
+    for (auto& name : gd.GetObjectList()) {
+        if (name.MatchesName(compare_name) && obj == name.GetObject()) {
+            // We found a match, clean up its resources.
+            obj->Close();
+            gd.GetObjectList().erase(gd.GetObjectList().iterator_to(name));
+            KObjectName::Free(kernel, std::addressof(name));
+            R_SUCCEED();
+        }
+    }
+
+    // We didn't find the object in the list.
+    R_THROW(ResultNotFound);
+}
+
+KScopedAutoObject<KAutoObject> KObjectName::Find(KernelCore& kernel, const char* name) {
+    // Get the global data.
+    KObjectNameGlobalData& gd{kernel.ObjectNameGlobalData()};
+
+    // Ensure we have exclusive access to the global list.
+    KScopedLightLock lk{gd.GetObjectListLock()};
+
+    return FindImpl(kernel, name);
+}
+
+KScopedAutoObject<KAutoObject> KObjectName::FindImpl(KernelCore& kernel, const char* compare_name) {
+    // Get the global data.
+    KObjectNameGlobalData& gd{kernel.ObjectNameGlobalData()};
+
+    // Try to find a matching object in the global list.
+    for (const auto& name : gd.GetObjectList()) {
+        if (name.MatchesName(compare_name)) {
+            return name.GetObject();
+        }
+    }
+
+    // There's no matching entry in the list.
+    return nullptr;
+}
+
+} // namespace Kernel
-- 
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