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// 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 <boost/config.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;
BOOST_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);
}
Pipe::Pipe(Pipe&& other) BOOST_NOEXCEPT_OR_NOTHROW {
swap(other);
}
Pipe& Pipe::operator=(Pipe other) BOOST_NOEXCEPT_OR_NOTHROW {
swap(other);
return *this;
}
void Pipe::swap(Pipe& other) BOOST_NOEXCEPT_OR_NOTHROW {
using std::swap;
swap(m_read_end, other.m_read_end);
swap(m_write_end, other.m_write_end);
}
} // namespace winapi
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