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6bdb81ad87
InodeVMObject is a VMObject with an underlying Inode in the filesystem. AnonymousVMObject has no Inode. I'm happy that InodeVMObject::inode() can now return Inode& instead of VMObject::inode() return Inode*. :^)
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
#pragma once
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#include <AK/AKString.h>
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#include <AK/RefPtr.h>
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#include <AK/RefCounted.h>
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#include <Kernel/FileSystem/File.h>
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#include <Kernel/KResult.h>
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#include <Kernel/UnixTypes.h>
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class AnonymousVMObject;
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class SharedMemory : public File {
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public:
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static KResultOr<NonnullRefPtr<SharedMemory>> open(const String& name, int flags, mode_t);
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static KResult unlink(const String& name);
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virtual ~SharedMemory() override;
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const String& name() const { return m_name; }
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virtual KResult truncate(off_t) override;
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AnonymousVMObject* vmo() { return m_vmo.ptr(); }
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const AnonymousVMObject* vmo() const { return m_vmo.ptr(); }
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uid_t uid() const { return m_uid; }
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gid_t gid() const { return m_gid; }
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private:
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// ^File
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virtual bool can_read(FileDescription&) const override { return true; }
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virtual bool can_write(FileDescription&) const override { return true; }
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virtual int read(FileDescription&, u8*, int) override;
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virtual int write(FileDescription&, const u8*, int) override;
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virtual String absolute_path(const FileDescription&) const override;
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virtual const char* class_name() const override { return "SharedMemory"; }
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virtual bool is_shared_memory() const override { return true; }
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virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress, size_t offset, size_t size, int prot) override;
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SharedMemory(const String& name, uid_t, gid_t, mode_t);
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String m_name;
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uid_t m_uid { 0 };
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gid_t m_gid { 0 };
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mode_t m_mode { 0 };
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RefPtr<AnonymousVMObject> m_vmo;
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};
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