42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
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//===- xray-registry.cc - Implement a command registry. -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement a simple subcommand registry.
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//
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//===----------------------------------------------------------------------===//
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#include "xray-registry.h"
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#include "llvm/Support/ManagedStatic.h"
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#include <unordered_map>
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namespace llvm {
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namespace xray {
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using HandlerType = std::function<Error()>;
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ManagedStatic<std::unordered_map<cl::SubCommand *, HandlerType>> Commands;
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CommandRegistration::CommandRegistration(cl::SubCommand *SC,
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HandlerType Command) {
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assert(Commands->count(SC) == 0 &&
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"Attempting to overwrite a command handler");
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assert(Command && "Attempting to register an empty std::function<Error()>");
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(*Commands)[SC] = Command;
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}
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HandlerType dispatch(cl::SubCommand *SC) {
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auto It = Commands->find(SC);
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assert(It != Commands->end() &&
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"Attempting to dispatch on un-registered SubCommand.");
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return It->second;
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}
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} // namespace xray
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} // namespace llvm
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