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https://github.com/NixOS/nix
synced 2025-06-25 06:31:14 +02:00
39b2a399ad
Building derivations is a lot harder, but the downloading goals is portable enough. The "common channel" code is due to Volth. I wonder if there is a way we can factor it out into separate functions / files to avoid some within-function CPP. Co-authored-by: volth <volth@volth.com>
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
#include "windows-async-pipe.hh"
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#include "windows-error.hh"
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namespace nix::windows {
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void AsyncPipe::createAsyncPipe(HANDLE iocp)
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{
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// std::cerr << (format("-----AsyncPipe::createAsyncPipe(%x)") % iocp) << std::endl;
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buffer.resize(0x1000);
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memset(&overlapped, 0, sizeof(overlapped));
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std::string pipeName = fmt("\\\\.\\pipe\\nix-%d-%p", GetCurrentProcessId(), (void *) this);
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readSide = CreateNamedPipeA(
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pipeName.c_str(), PIPE_ACCESS_INBOUND | FILE_FLAG_OVERLAPPED, PIPE_TYPE_BYTE, PIPE_UNLIMITED_INSTANCES, 0, 0,
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INFINITE, NULL);
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if (!readSide)
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throw WinError("CreateNamedPipeA(%s)", pipeName);
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HANDLE hIocp = CreateIoCompletionPort(readSide.get(), iocp, (ULONG_PTR) (readSide.get()) ^ 0x5555, 0);
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if (hIocp != iocp)
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throw WinError("CreateIoCompletionPort(%x[%s], %x, ...) returned %x", readSide.get(), pipeName, iocp, hIocp);
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if (!ConnectNamedPipe(readSide.get(), &overlapped) && GetLastError() != ERROR_IO_PENDING)
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throw WinError("ConnectNamedPipe(%s)", pipeName);
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SECURITY_ATTRIBUTES psa2 = {0};
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psa2.nLength = sizeof(SECURITY_ATTRIBUTES);
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psa2.bInheritHandle = TRUE;
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writeSide = CreateFileA(pipeName.c_str(), GENERIC_WRITE, 0, &psa2, OPEN_EXISTING, 0, NULL);
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if (!readSide)
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throw WinError("CreateFileA(%s)", pipeName);
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}
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void AsyncPipe::close()
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{
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readSide.close();
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writeSide.close();
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}
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}
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