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https://github.com/RGBCube/serenity
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2b4374d08e
This ownership model is a bit confusing. There's a retain cycle between MasterPTY and SlavePTY, but it's broken when the SlavePTY is closed, meaning that there are no more FileDescriptors referring to it.
46 lines
980 B
C++
46 lines
980 B
C++
#include "SlavePTY.h"
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#include "MasterPTY.h"
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#include "DevPtsFS.h"
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SlavePTY::SlavePTY(MasterPTY& master, unsigned index)
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: TTY(11, index)
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, m_master(master)
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, m_index(index)
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{
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VFS::the().register_character_device(*this);
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DevPtsFS::the().register_slave_pty(*this);
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set_size(80, 25);
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}
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SlavePTY::~SlavePTY()
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{
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dbgprintf("~SlavePTY(%u)\n", m_index);
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DevPtsFS::the().unregister_slave_pty(*this);
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VFS::the().unregister_character_device(*this);
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}
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String SlavePTY::tty_name() const
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{
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return String::format("/dev/pts/%u", m_index);
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}
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void SlavePTY::on_master_write(const byte* buffer, size_t size)
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{
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for (size_t i = 0; i < size; ++i)
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emit(buffer[i]);
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}
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void SlavePTY::on_tty_write(const byte* data, size_t size)
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{
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m_master->on_slave_write(data, size);
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}
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bool SlavePTY::can_write(Process&) const
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{
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return m_master->can_write_from_slave();
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}
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void SlavePTY::close()
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{
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m_master->notify_slave_closed(Badge<SlavePTY>());
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}
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