pipe.cpp

// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "winapi-common" project.
// For details, see https://github.com/egor-tensin/winapi-common.
// Distributed under the MIT License.
 
#include <winapi/error.hpp>
#include <winapi/handle.hpp>
#include <winapi/pipe.hpp>
 
#include <windows.h>
 
#include <cstring>
#include <utility>
 
namespace winapi {
namespace {
 
void create_pipe(Handle& read_end, Handle& write_end) {
    HANDLE read_end_impl = INVALID_HANDLE_VALUE;
    HANDLE write_end_impl = INVALID_HANDLE_VALUE;
 
    SECURITY_ATTRIBUTES attributes;
    std::memset(&attributes, 0, sizeof(attributes));
    attributes.nLength = sizeof(attributes);
    attributes.bInheritHandle = TRUE;
 
    static constexpr DWORD buffer_size = 16 * 1024;
 
    const auto ret = ::CreatePipe(&read_end_impl, &write_end_impl, &attributes, buffer_size);
 
    if (!ret) {
        throw error::windows(GetLastError(), "CreatePipe");
    }
 
    read_end = Handle{read_end_impl};
    write_end = Handle{write_end_impl};
}
 
} // namespace
 
Pipe::Pipe() {
    create_pipe(m_read_end, m_write_end);
}
 
} // namespace winapi