video_core: Page manager and memory tracker improvenets (#3155)

* I don't know what to put here

* clang-format

* clang-format 2.0

* Deadlock free locking

* Por boost range lock implementation

* clang-format

src/common/range_lock.h

@@ -0,0 +1,101 @@
+// SPDX-FileCopyrightText: Copyright 2025 shadPS4 Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <iterator>
+#include <mutex>
+
+namespace Common {
+
+// From boost thread locking
+
+template <typename Iterator>
+struct RangeLockGuard {
+    Iterator begin;
+    Iterator end;
+
+    RangeLockGuard(Iterator begin_, Iterator end_) : begin(begin_), end(end_) {
+        LockRange(begin, end);
+    }
+
+    void release() {
+        begin = end;
+    }
+
+    ~RangeLockGuard() {
+        for (; begin != end; ++begin) {
+            begin->unlock();
+        }
+    }
+};
+
+template <typename Iterator>
+Iterator TryLockRange(Iterator begin, Iterator end) {
+    using LockType = typename std::iterator_traits<Iterator>::value_type;
+
+    if (begin == end) {
+        return end;
+    }
+
+    std::unique_lock<LockType> guard(*begin, std::try_to_lock);
+    if (!guard.owns_lock()) {
+        return begin;
+    }
+
+    Iterator failed = TryLockRange(++begin, end);
+    if (failed == end) {
+        guard.release();
+    }
+
+    return failed;
+}
+
+template <typename Iterator>
+void LockRange(Iterator begin, Iterator end) {
+    using LockType = typename std::iterator_traits<Iterator>::value_type;
+
+    if (begin == end) {
+        return;
+    }
+
+    bool start_with_begin = true;
+    Iterator second = begin;
+    ++second;
+    Iterator next = second;
+
+    while (true) {
+        std::unique_lock<LockType> begin_lock(*begin, std::defer_lock);
+        if (start_with_begin) {
+            begin_lock.lock();
+
+            const Iterator failed_lock = TryLockRange(next, end);
+            if (failed_lock == end) {
+                begin_lock.release();
+                return;
+            }
+
+            start_with_begin = false;
+            next = failed_lock;
+        } else {
+            RangeLockGuard<Iterator> guard(next, end);
+
+            if (begin_lock.try_lock()) {
+                const Iterator failed_lock = TryLockRange(second, next);
+                if (failed_lock == next) {
+                    begin_lock.release();
+                    guard.release();
+                    return;
+                }
+
+                start_with_begin = false;
+                next = failed_lock;
+            } else {
+                start_with_begin = true;
+                next = second;
+            }
+        }
+    }
+}
+
+} // namespace Common