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- #pragma once
- #include <AK/AKString.h>
- #include <AK/RetainPtr.h>
- #include <AK/Retainable.h>
- #include <Kernel/File.h>
- #include <Kernel/KResult.h>
- #include <Kernel/UnixTypes.h>
- class VMObject;
- class SharedMemory : public File {
- public:
- static KResultOr<Retained<SharedMemory>> open(const String& name, int flags, mode_t);
- static KResult unlink(const String& name);
- virtual ~SharedMemory() override;
- 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(FileDescriptor&) const override { return true; }
- virtual bool can_write(FileDescriptor&) const override { return true; }
- virtual int read(FileDescriptor&, byte*, int) override;
- virtual int write(FileDescriptor&, const byte*, int) override;
- virtual String absolute_path(const FileDescriptor&) 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&, LinearAddress, 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 };
- RetainPtr<VMObject> m_vmo;
- };
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