From e6c3a80b01ffb52079783cddd9be6d392d0f7039 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Mon, 29 Jul 2024 19:59:52 -0400
Subject: redesign compositor protocol, start widget library

---
 euler/include/std/unique-lock.hpp | 53 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 euler/include/std/unique-lock.hpp

(limited to 'euler/include/std/unique-lock.hpp')

diff --git a/euler/include/std/unique-lock.hpp b/euler/include/std/unique-lock.hpp
new file mode 100644
index 0000000..14b3645
--- /dev/null
+++ b/euler/include/std/unique-lock.hpp
@@ -0,0 +1,53 @@
+#pragma once
+
+namespace std {
+
+  template <class Mutex>
+  class unique_lock {
+
+    Mutex *the_mutex;
+    bool has_locked;
+
+  public:
+    inline unique_lock() noexcept : the_mutex(0) {}
+
+    unique_lock(const unique_lock &other) = delete;
+
+    inline unique_lock(unique_lock &&other) noexcept
+    : the_mutex(other.the_mutex), has_locked(other.has_locked) {
+      other.the_mutex = 0;
+    }
+
+    inline explicit unique_lock(Mutex &m)
+    : the_mutex(&m), has_locked(true) {
+      the_mutex->lock();
+    }
+
+    inline ~unique_lock() {
+      if (the_mutex && has_locked)
+        the_mutex->unlock();
+    }
+
+    unique_lock &operator =(const unique_lock &other) = delete;
+
+    inline unique_lock &operator =(unique_lock &&other) {
+      if (the_mutex && has_locked)
+        the_mutex->unlock();
+      the_mutex = other.the_mutex;
+      has_locked = other.has_locked;
+      other.the_mutex = 0;
+    }
+
+    inline void lock() {
+      the_mutex->lock();
+      has_locked = true;
+    }
+
+    inline void unlock() {
+      the_mutex->unlock();
+      has_locked = false;
+    }
+
+  };
+
+}
-- 
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