mirror of
https://github.com/wpilibsuite/allwpilib
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e2314f3528
- Provide an EventLoopRunner to run uv::Loop on a separate thread. - Add raw_ostream wrapper for uv::Buffer.
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) 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 WPIUTIL_WPI_RAW_UV_OSTREAM_H_
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#define WPIUTIL_WPI_RAW_UV_OSTREAM_H_
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#include "wpi/ArrayRef.h"
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#include "wpi/SmallVector.h"
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#include "wpi/raw_ostream.h"
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#include "wpi/uv/Buffer.h"
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namespace wpi {
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/**
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* raw_ostream style output to a SmallVector of uv::Buffer buffers. Fixed-size
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* buffers are allocated and appended as necessary to fit the data being output.
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* The SmallVector need not be empty at start.
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*/
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class raw_uv_ostream : public raw_ostream {
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public:
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/**
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* Construct a new raw_uv_ostream.
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* @param bufs Buffers vector. NOT cleared on construction.
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* @param allocSize Size to allocate for each buffer; allocation will be
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* performed using Buffer::Allocate().
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*/
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raw_uv_ostream(SmallVectorImpl<uv::Buffer>& bufs, size_t allocSize)
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: m_bufs(bufs),
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m_alloc([=]() { return uv::Buffer::Allocate(allocSize); }) {
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SetUnbuffered();
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}
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/**
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* Construct a new raw_uv_ostream.
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* @param bufs Buffers vector. NOT cleared on construction.
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* @param alloc Allocator.
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*/
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raw_uv_ostream(SmallVectorImpl<uv::Buffer>& bufs,
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std::function<uv::Buffer()> alloc)
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: m_bufs(bufs), m_alloc(alloc) {
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SetUnbuffered();
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}
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~raw_uv_ostream() override = default;
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/**
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* Returns an ArrayRef to the buffers.
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*/
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ArrayRef<uv::Buffer> bufs() { return m_bufs; }
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void flush() = delete;
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private:
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void write_impl(const char* data, size_t len) override;
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uint64_t current_pos() const override;
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SmallVectorImpl<uv::Buffer>& m_bufs;
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std::function<uv::Buffer()> m_alloc;
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// How much allocated space is left in the current buffer.
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size_t m_left = 0;
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};
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} // namespace wpi
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#endif // WPIUTIL_WPI_RAW_UV_OSTREAM_H_
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