1 files changed, 24 insertions, 0 deletions
diff --git a/Kernel/PTYMultiplexer.h b/Kernel/PTYMultiplexer.h
new file mode 100644
index 0000000000..4646fc7f05
--- /dev/null
+++ b/Kernel/PTYMultiplexer.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <VirtualFileSystem/CharacterDevice.h>
+#include <AK/Lock.h>
+
+class MasterPTY;
+
+class PTYMultiplexer final : public CharacterDevice {
+    AK_MAKE_ETERNAL
+public:
+    PTYMultiplexer();
+    virtual ~PTYMultiplexer() override;
+
+    // ^CharacterDevice
+    virtual RetainPtr<FileDescriptor> open(int& error, int options) override;
+    virtual ssize_t read(Process&, byte*, size_t) override { return 0; }
+    virtual ssize_t write(Process&, const byte*, size_t) override { return 0; }
+    virtual bool can_read(Process&) const override { return true; }
+    virtual bool can_write(Process&) const override { return true; }
+
+private:
+    SpinLock m_lock;
+    Vector<RetainPtr<MasterPTY>> m_freelist;
+};