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66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
//===- SmallVectorMemoryBuffer.h --------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares a wrapper class to hold the memory into which an
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// object will be generated.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_SMALLVECTORMEMORYBUFFER_H
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#define LLVM_SUPPORT_SMALLVECTORMEMORYBUFFER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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/// SmallVector-backed MemoryBuffer instance.
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///
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/// This class enables efficient construction of MemoryBuffers from SmallVector
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/// instances. This is useful for MCJIT and Orc, where object files are streamed
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/// into SmallVectors, then inspected using ObjectFile (which takes a
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/// MemoryBuffer).
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class SmallVectorMemoryBuffer : public MemoryBuffer {
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public:
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/// Construct an SmallVectorMemoryBuffer from the given SmallVector
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/// r-value.
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///
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/// FIXME: It'd be nice for this to be a non-templated constructor taking a
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/// SmallVectorImpl here instead of a templated one taking a SmallVector<N>,
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/// but SmallVector's move-construction/assignment currently only take
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/// SmallVectors. If/when that is fixed we can simplify this constructor and
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/// the following one.
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SmallVectorMemoryBuffer(SmallVectorImpl<char> &&SV)
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: SV(std::move(SV)), BufferName("<in-memory object>") {
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init(this->SV.begin(), this->SV.end(), false);
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}
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/// Construct a named SmallVectorMemoryBuffer from the given
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/// SmallVector r-value and StringRef.
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SmallVectorMemoryBuffer(SmallVectorImpl<char> &&SV, StringRef Name)
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: SV(std::move(SV)), BufferName(std::string(Name)) {
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init(this->SV.begin(), this->SV.end(), false);
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}
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// Key function.
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~SmallVectorMemoryBuffer() override;
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StringRef getBufferIdentifier() const override { return BufferName; }
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BufferKind getBufferKind() const override { return MemoryBuffer_Malloc; }
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private:
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SmallVector<char, 0> SV;
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std::string BufferName;
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};
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} // namespace llvm
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#endif
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