80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
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//===- FDRawByteChannel.h - File descriptor based byte-channel -*- 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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// File descriptor based RawByteChannel.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_SHARED_FDRAWBYTECHANNEL_H
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#define LLVM_EXECUTIONENGINE_ORC_SHARED_FDRAWBYTECHANNEL_H
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#include "llvm/ExecutionEngine/Orc/Shared/RawByteChannel.h"
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#if !defined(_MSC_VER) && !defined(__MINGW32__)
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#include <unistd.h>
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#else
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#include <io.h>
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#endif
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namespace llvm {
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namespace orc {
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namespace shared {
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/// Serialization channel that reads from and writes from file descriptors.
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class FDRawByteChannel final : public RawByteChannel {
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public:
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FDRawByteChannel(int InFD, int OutFD) : InFD(InFD), OutFD(OutFD) {}
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llvm::Error readBytes(char *Dst, unsigned Size) override {
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assert(Dst && "Attempt to read into null.");
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ssize_t Completed = 0;
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while (Completed < static_cast<ssize_t>(Size)) {
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ssize_t Read = ::read(InFD, Dst + Completed, Size - Completed);
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if (Read <= 0) {
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auto ErrNo = errno;
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if (ErrNo == EAGAIN || ErrNo == EINTR)
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continue;
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else
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return llvm::errorCodeToError(
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std::error_code(errno, std::generic_category()));
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}
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Completed += Read;
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}
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return llvm::Error::success();
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}
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llvm::Error appendBytes(const char *Src, unsigned Size) override {
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assert(Src && "Attempt to append from null.");
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ssize_t Completed = 0;
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while (Completed < static_cast<ssize_t>(Size)) {
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ssize_t Written = ::write(OutFD, Src + Completed, Size - Completed);
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if (Written < 0) {
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auto ErrNo = errno;
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if (ErrNo == EAGAIN || ErrNo == EINTR)
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continue;
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else
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return llvm::errorCodeToError(
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std::error_code(errno, std::generic_category()));
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}
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Completed += Written;
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}
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return llvm::Error::success();
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}
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llvm::Error send() override { return llvm::Error::success(); }
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private:
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int InFD, OutFD;
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};
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} // namespace shared
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} // namespace orc
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} // namespace llvm
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#endif // LLVM_EXECUTIONENGINE_ORC_SHARED_FDRAWBYTECHANNEL_H
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