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#pragma once
#include <AK/AKString.h>
#include <AK/RefPtr.h>
#include <AK/RefCounted.h>
#include <Kernel/File.h>
#include <Kernel/KResult.h>
#include <Kernel/UnixTypes.h>
class VMObject;
class SharedMemory : public File {
public:
static KResultOr<NonnullRefPtr<SharedMemory>> open(const String& name, int flags, mode_t);
static KResult unlink(const String& name);
virtual ~SharedMemory() override;
const String& name() const { return m_name; }
virtual KResult truncate(off_t) override;
VMObject* vmo() { return m_vmo.ptr(); }
const VMObject* vmo() const { return m_vmo.ptr(); }
uid_t uid() const { return m_uid; }
gid_t gid() const { return m_gid; }
private:
// ^File
virtual bool can_read(FileDescription&) const override { return true; }
virtual bool can_write(FileDescription&) const override { return true; }
virtual int read(FileDescription&, u8*, int) override;
virtual int write(FileDescription&, const u8*, int) override;
virtual String absolute_path(const FileDescription&) const override;
virtual const char* class_name() const override { return "SharedMemory"; }
virtual bool is_shared_memory() const override { return true; }
virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress, size_t offset, size_t size, int prot) override;
SharedMemory(const String& name, uid_t, gid_t, mode_t);
String m_name;
uid_t m_uid { 0 };
gid_t m_gid { 0 };
mode_t m_mode { 0 };
RefPtr<VMObject> m_vmo;
};
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