mirror of
https://github.com/RGBCube/serenity
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de65c960e9
String&& is just not very practical. Also return const String& when the returned string is a member variable. The call site is free to make a copy if he wants, but otherwise we can avoid the retain count churn.
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
#pragma once
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#include <AK/AKString.h>
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#include <AK/RetainPtr.h>
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#include <AK/Retainable.h>
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#include <Kernel/File.h>
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#include <Kernel/KResult.h>
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#include <Kernel/UnixTypes.h>
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class VMObject;
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class SharedMemory : public File {
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public:
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static KResultOr<Retained<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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VMObject* vmo() { return m_vmo.ptr(); }
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const VMObject* 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&, byte*, int) override;
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virtual int write(FileDescription&, const byte*, 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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RetainPtr<VMObject> m_vmo;
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};
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