Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibCore/AnonymousBufferWindows.cpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
+ * Copyright (c) 2024, stasoid <stasoid@yahoo.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCore/AnonymousBuffer.h>
+#include <windows.h>
+
+namespace Core {
+
+AnonymousBufferImpl::AnonymousBufferImpl(int fd, size_t size, void* data)
+    : m_fd(fd)
+    , m_size(size)
+    , m_data(data)
+{
+}
+
+AnonymousBufferImpl::~AnonymousBufferImpl()
+{
+    if (m_data)
+        VERIFY(UnmapViewOfFile(m_data));
+
+    if (m_fd != -1)
+        VERIFY(CloseHandle((HANDLE)(intptr_t)m_fd));
+}
+
+ErrorOr<NonnullRefPtr<AnonymousBufferImpl>> AnonymousBufferImpl::create(size_t size)
+{
+    HANDLE map_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, HIWORD(size), LOWORD(size), NULL);
+    if (!map_handle)
+        return Error::from_windows_error(GetLastError());
+
+    return create((int)(intptr_t)map_handle, size);
+}
+
+ErrorOr<NonnullRefPtr<AnonymousBufferImpl>> AnonymousBufferImpl::create(int fd, size_t size)
+{
+    void* ptr = MapViewOfFile((HANDLE)(intptr_t)fd, FILE_MAP_ALL_ACCESS, 0, 0, size);
+    if (!ptr)
+        return Error::from_windows_error(GetLastError());
+
+    return adopt_nonnull_ref_or_enomem(new (nothrow) AnonymousBufferImpl(fd, size, ptr));
+}
+
+ErrorOr<AnonymousBuffer> AnonymousBuffer::create_with_size(size_t size)
+{
+    auto impl = TRY(AnonymousBufferImpl::create(size));
+    return AnonymousBuffer(move(impl));
+}
+
+ErrorOr<AnonymousBuffer> AnonymousBuffer::create_from_anon_fd(int fd, size_t size)
+{
+    auto impl = TRY(AnonymousBufferImpl::create(fd, size));
+    return AnonymousBuffer(move(impl));
+}
+
+}