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/* Copyright 2016-present Facebook, Inc.
* Licensed under the Apache License, Version 2.0 */
#include "watchman.h"
#include "Pipe.h"
#include <system_error>
namespace watchman {
Pipe::Pipe() {
#ifdef _WIN32
HANDLE readPipe;
HANDLE writePipe;
SECURITY_ATTRIBUTES sec;
memset(&sec, 0, sizeof(sec));
sec.nLength = sizeof(sec);
sec.bInheritHandle = FALSE; // O_CLOEXEC equivalent
constexpr DWORD kPipeSize = 64 * 1024;
if (!CreatePipe(&readPipe, &writePipe, &sec, kPipeSize)) {
throw std::system_error(
GetLastError(), std::system_category(), "CreatePipe failed");
}
read = FileDescriptor(intptr_t(readPipe));
write = FileDescriptor(intptr_t(writePipe));
#else
int fds[2];
int res;
#if HAVE_PIPE2
res = pipe2(fds, O_NONBLOCK | O_CLOEXEC);
#else
res = pipe(fds);
#endif
if (res) {
throw std::system_error(
errno,
std::system_category(),
std::string("pipe error: ") + strerror(errno));
}
read = FileDescriptor(fds[0]);
write = FileDescriptor(fds[1]);
#if !HAVE_PIPE2
read.setCloExec();
read.setNonBlock();
write.setCloExec();
write.setNonBlock();
#endif
#endif
}
}
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