LibCore: Move LibGUI/GLock to LibCore/CLock.

1 files changed, 0 insertions, 103 deletions

diff --git a/LibGUI/GLock.h b/LibGUI/GLock.h
deleted file mode 100644
index ad0f1c4995..0000000000
--- a/LibGUI/GLock.h
+++ /dev/null
@@ -1,103 +0,0 @@
-#pragma once
-
-#include <AK/Assertions.h>
-#include <AK/Types.h>
-#include <unistd.h>
-
-#define memory_barrier() asm volatile ("" ::: "memory")
-
-static inline dword CAS(volatile dword* mem, dword newval, dword oldval)
-{
-    dword ret;
-    asm volatile(
-        "cmpxchgl %2, %1"
-        :"=a"(ret), "+m"(*mem)
-        :"r"(newval), "0"(oldval)
-        :"cc", "memory");
-    return ret;
-}
-
-class GLock {
-public:
-    GLock() { }
-    ~GLock() { }
-
-    void lock();
-    void unlock();
-
-private:
-    volatile dword m_lock { 0 };
-    dword m_level { 0 };
-    int m_holder { -1 };
-};
-
-class GLocker {
-public:
-    [[gnu::always_inline]] inline explicit GLocker(GLock& l) : m_lock(l) { lock(); }
-    [[gnu::always_inline]] inline ~GLocker() { unlock(); }
-    [[gnu::always_inline]] inline void unlock() { m_lock.unlock(); }
-    [[gnu::always_inline]] inline void lock() { m_lock.lock(); }
-
-private:
-    GLock& m_lock;
-};
-
-[[gnu::always_inline]] inline void GLock::lock()
-{
-    for (;;) {
-        if (CAS(&m_lock, 1, 0) == 0) {
-            if (m_holder == -1 || m_holder == gettid()) {
-                m_holder = gettid();
-                ++m_level;
-                memory_barrier();
-                m_lock = 0;
-                return;
-            }
-            m_lock = 0;
-        }
-        donate(m_holder);
-    }
-}
-
-inline void GLock::unlock()
-{
-    for (;;) {
-        if (CAS(&m_lock, 1, 0) == 0) {
-            ASSERT(m_holder == gettid());
-            ASSERT(m_level);
-            --m_level;
-            if (m_level) {
-                memory_barrier();
-                m_lock = 0;
-                return;
-            }
-            m_holder = -1;
-            memory_barrier();
-            m_lock = 0;
-            return;
-        }
-        donate(m_holder);
-    }
-}
-
-#define LOCKER(lock) GLocker locker(lock)
-
-template<typename T>
-class GLockable {
-public:
-    GLockable() { }
-    GLockable(T&& resource) : m_resource(move(resource)) { }
-    GLock& lock() { return m_lock; }
-    T& resource() { return m_resource; }
-
-    T lock_and_copy()
-    {
-        LOCKER(m_lock);
-        return m_resource;
-    }
-
-private:
-    T m_resource;
-    GLock m_lock;
-};
-