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https://github.com/SerenityOS/serenity
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beda478821
Dealing with the unsigned overflow propagation here just seems unreasonably error prone. Let's limit ourselves to 2GB buffer sizes instead.
37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
#pragma once
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#include <AK/Badge.h>
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#include <Kernel/CharacterDevice.h>
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#include <Kernel/DoubleBuffer.h>
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class SlavePTY;
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class MasterPTY final : public CharacterDevice {
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public:
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explicit MasterPTY(unsigned index);
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virtual ~MasterPTY() override;
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unsigned index() const { return m_index; }
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String pts_name() const;
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ssize_t on_slave_write(const byte*, ssize_t);
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bool can_write_from_slave() const;
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void notify_slave_closed(Badge<SlavePTY>);
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bool is_closed() const { return m_closed; }
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private:
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// ^CharacterDevice
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virtual ssize_t read(Process&, byte*, ssize_t) override;
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virtual ssize_t write(Process&, const byte*, ssize_t) override;
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virtual bool can_read(Process&) const override;
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virtual bool can_write(Process&) const override;
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virtual void close() override;
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virtual bool is_master_pty() const override { return true; }
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virtual int ioctl(Process&, unsigned request, unsigned arg) override;
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virtual const char* class_name() const override { return "MasterPTY"; }
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RetainPtr<SlavePTY> m_slave;
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unsigned m_index;
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bool m_closed { false };
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DoubleBuffer m_buffer;
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};
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