mirror of
https://github.com/wpilibsuite/allwpilib
synced 2026-06-20 00:51:42 +00:00
f84018af5f
During shared library loading, a different libLLVM can be pulled in, causing llvm symbols from dependent libraries to resolve to that library instead of this one. This has been seen in the wild with the Mesa OpenGL implementation in JavaFX applications (see wpilibsuite/shuffleboard#361). This is clearly a very breaking change. For some level of backwards compatibility, a namespace alias from llvm to wpi is performed in the "llvm" headers. Unfortunately, forward declarations of llvm classes will still break, but compilers seem to generate clear error messages in those cases ("namespace alias 'llvm' not allowed here, assuming 'wpi'"). This change also moves all the wpiutil headers to a single "wpi" subdirectory from the previously split "llvm", "support", "tcpsockets", and "udpsockets". Shim headers will be added for backwards compatibility in a later commit.
118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) FIRST 2015-2018. 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_MESSAGE_H_
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#define NTCORE_MESSAGE_H_
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#include <functional>
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#include <memory>
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#include <string>
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#include "networktables/NetworkTableValue.h"
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namespace nt {
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class WireDecoder;
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class WireEncoder;
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class Message {
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struct private_init {};
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public:
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enum MsgType {
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kUnknown = -1,
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kKeepAlive = 0x00,
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kClientHello = 0x01,
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kProtoUnsup = 0x02,
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kServerHelloDone = 0x03,
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kServerHello = 0x04,
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kClientHelloDone = 0x05,
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kEntryAssign = 0x10,
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kEntryUpdate = 0x11,
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kFlagsUpdate = 0x12,
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kEntryDelete = 0x13,
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kClearEntries = 0x14,
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kExecuteRpc = 0x20,
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kRpcResponse = 0x21
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};
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typedef std::function<NT_Type(unsigned int id)> GetEntryTypeFunc;
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Message() : m_type(kUnknown), m_id(0), m_flags(0), m_seq_num_uid(0) {}
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Message(MsgType type, const private_init&)
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: m_type(type), m_id(0), m_flags(0), m_seq_num_uid(0) {}
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MsgType type() const { return m_type; }
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bool Is(MsgType type) const { return type == m_type; }
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// Message data accessors. Callers are responsible for knowing what data is
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// actually provided for a particular message.
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wpi::StringRef str() const { return m_str; }
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std::shared_ptr<Value> value() const { return m_value; }
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unsigned int id() const { return m_id; }
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unsigned int flags() const { return m_flags; }
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unsigned int seq_num_uid() const { return m_seq_num_uid; }
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// Read and write from wire representation
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void Write(WireEncoder& encoder) const;
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static std::shared_ptr<Message> Read(WireDecoder& decoder,
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GetEntryTypeFunc get_entry_type);
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// Create messages without data
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static std::shared_ptr<Message> KeepAlive() {
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return std::make_shared<Message>(kKeepAlive, private_init());
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}
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static std::shared_ptr<Message> ProtoUnsup() {
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return std::make_shared<Message>(kProtoUnsup, private_init());
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}
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static std::shared_ptr<Message> ServerHelloDone() {
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return std::make_shared<Message>(kServerHelloDone, private_init());
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}
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static std::shared_ptr<Message> ClientHelloDone() {
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return std::make_shared<Message>(kClientHelloDone, private_init());
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}
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static std::shared_ptr<Message> ClearEntries() {
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return std::make_shared<Message>(kClearEntries, private_init());
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}
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// Create messages with data
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static std::shared_ptr<Message> ClientHello(wpi::StringRef self_id);
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static std::shared_ptr<Message> ServerHello(unsigned int flags,
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wpi::StringRef self_id);
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static std::shared_ptr<Message> EntryAssign(wpi::StringRef name,
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unsigned int id,
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unsigned int seq_num,
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std::shared_ptr<Value> value,
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unsigned int flags);
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static std::shared_ptr<Message> EntryUpdate(unsigned int id,
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unsigned int seq_num,
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std::shared_ptr<Value> value);
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static std::shared_ptr<Message> FlagsUpdate(unsigned int id,
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unsigned int flags);
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static std::shared_ptr<Message> EntryDelete(unsigned int id);
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static std::shared_ptr<Message> ExecuteRpc(unsigned int id, unsigned int uid,
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wpi::StringRef params);
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static std::shared_ptr<Message> RpcResponse(unsigned int id, unsigned int uid,
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wpi::StringRef result);
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Message(const Message&) = delete;
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Message& operator=(const Message&) = delete;
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private:
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MsgType m_type;
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// Message data. Use varies by message type.
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std::string m_str;
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std::shared_ptr<Value> m_value;
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unsigned int m_id; // also used for proto_rev
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unsigned int m_flags;
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unsigned int m_seq_num_uid;
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};
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} // namespace nt
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#endif // NTCORE_MESSAGE_H_
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