mirror of
https://github.com/wpilibsuite/allwpilib
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66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) 2016-2018 FIRST. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in the root directory of */
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/* the project. */
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/*----------------------------------------------------------------------------*/
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#ifndef NTCORE_HANDLE_H_
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#define NTCORE_HANDLE_H_
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#include "ntcore_c.h"
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namespace nt {
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// Handle data layout:
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// Bits 30-28: Type
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// Bits 27-20: Instance index
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// Bits 19-0: Handle index (0/unused for instance handles)
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class Handle {
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public:
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enum Type {
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kConnectionListener = 1,
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kConnectionListenerPoller,
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kEntry,
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kEntryListener,
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kEntryListenerPoller,
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kInstance,
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kLogger,
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kLoggerPoller,
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kRpcCall,
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kRpcCallPoller
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};
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enum { kIndexMax = 0xfffff };
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explicit Handle(NT_Handle handle) : m_handle(handle) {}
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operator NT_Handle() const { return m_handle; }
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NT_Handle handle() const { return m_handle; }
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Handle(int inst, int index, Type type) {
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if (inst < 0 || index < 0) {
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m_handle = 0;
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return;
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}
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m_handle = ((static_cast<int>(type) & 0xf) << 27) | ((inst & 0x7f) << 20) |
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(index & 0xfffff);
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}
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int GetIndex() const { return static_cast<int>(m_handle) & 0xfffff; }
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Type GetType() const {
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return static_cast<Type>((static_cast<int>(m_handle) >> 27) & 0xf);
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}
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int GetInst() const { return (static_cast<int>(m_handle) >> 20) & 0x7f; }
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bool IsType(Type type) const { return type == GetType(); }
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int GetTypedIndex(Type type) const { return IsType(type) ? GetIndex() : -1; }
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int GetTypedInst(Type type) const { return IsType(type) ? GetInst() : -1; }
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private:
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NT_Handle m_handle;
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};
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} // namespace nt
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#endif // NTCORE_HANDLE_H_
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