LibThreading: Rename Lock => Mutex

Userland/Libraries/LibThreading/Mutex.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Assertions.h>
+#include <AK/Types.h>
+#include <pthread.h>
+
+namespace Threading {
+
+class Mutex {
+public:
+    Mutex()
+    {
+#ifndef __serenity__
+        pthread_mutexattr_t attr;
+        pthread_mutexattr_init(&attr);
+        pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+        pthread_mutex_init(&m_mutex, &attr);
+#endif
+    }
+    ~Mutex() { }
+
+    void lock();
+    void unlock();
+
+private:
+#ifdef __serenity__
+    pthread_mutex_t m_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+#else
+    pthread_mutex_t m_mutex;
+#endif
+};
+
+class MutexLocker {
+public:
+    ALWAYS_INLINE explicit MutexLocker(Mutex& mutex)
+        : m_mutex(mutex)
+    {
+        lock();
+    }
+    ALWAYS_INLINE ~MutexLocker() { unlock(); }
+    ALWAYS_INLINE void unlock() { m_mutex.unlock(); }
+    ALWAYS_INLINE void lock() { m_mutex.lock(); }
+
+private:
+    Mutex& m_mutex;
+};
+
+ALWAYS_INLINE void Mutex::lock()
+{
+    pthread_mutex_lock(&m_mutex);
+}
+
+ALWAYS_INLINE void Mutex::unlock()
+{
+    pthread_mutex_unlock(&m_mutex);
+}
+
+}