Kernel: Rename Memory::Space => Memory::AddressSpace

1 files changed, 87 insertions, 0 deletions

diff --git a/Kernel/Memory/AddressSpace.h b/Kernel/Memory/AddressSpace.h
new file mode 100644
index 0000000000..973a7f4fe3
--- /dev/null
+++ b/Kernel/Memory/AddressSpace.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/RedBlackTree.h>
+#include <AK/Vector.h>
+#include <AK/WeakPtr.h>
+#include <Kernel/Memory/AllocationStrategy.h>
+#include <Kernel/Memory/PageDirectory.h>
+#include <Kernel/UnixTypes.h>
+
+namespace Kernel::Memory {
+
+class AddressSpace {
+public:
+    static OwnPtr<AddressSpace> try_create(Process&, AddressSpace const* parent);
+    ~AddressSpace();
+
+    PageDirectory& page_directory() { return *m_page_directory; }
+    const PageDirectory& page_directory() const { return *m_page_directory; }
+
+    Region* add_region(NonnullOwnPtr<Region>);
+
+    size_t region_count() const { return m_regions.size(); }
+
+    RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() { return m_regions; }
+    const RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() const { return m_regions; }
+
+    void dump_regions();
+
+    KResult unmap_mmap_range(VirtualAddress, size_t);
+
+    Optional<VirtualRange> allocate_range(VirtualAddress, size_t, size_t alignment = PAGE_SIZE);
+
+    KResultOr<Region*> allocate_region_with_vmobject(VirtualRange const&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, StringView name, int prot, bool shared);
+    KResultOr<Region*> allocate_region(VirtualRange const&, StringView name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
+    void deallocate_region(Region& region);
+    NonnullOwnPtr<Region> take_region(Region& region);
+
+    KResultOr<Region*> try_allocate_split_region(Region const& source_region, VirtualRange const&, size_t offset_in_vmobject);
+    KResultOr<Vector<Region*, 2>> try_split_region_around_range(Region const& source_region, VirtualRange const&);
+
+    Region* find_region_from_range(VirtualRange const&);
+    Region* find_region_containing(VirtualRange const&);
+
+    Vector<Region*> find_regions_intersecting(VirtualRange const&);
+
+    bool enforces_syscall_regions() const { return m_enforces_syscall_regions; }
+    void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; }
+
+    void remove_all_regions(Badge<Process>);
+
+    RecursiveSpinLock& get_lock() const { return m_lock; }
+
+    size_t amount_clean_inode() const;
+    size_t amount_dirty_private() const;
+    size_t amount_virtual() const;
+    size_t amount_resident() const;
+    size_t amount_shared() const;
+    size_t amount_purgeable_volatile() const;
+    size_t amount_purgeable_nonvolatile() const;
+
+private:
+    AddressSpace(Process&, NonnullRefPtr<PageDirectory>);
+
+    Process* m_process { nullptr };
+    mutable RecursiveSpinLock m_lock;
+
+    RefPtr<PageDirectory> m_page_directory;
+
+    RedBlackTree<FlatPtr, NonnullOwnPtr<Region>> m_regions;
+
+    struct RegionLookupCache {
+        Optional<VirtualRange> range;
+        WeakPtr<Region> region;
+    };
+    RegionLookupCache m_region_lookup_cache;
+
+    bool m_enforces_syscall_regions { false };
+};
+
+}