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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/cmd_line.hpp>
#include <winapi/error.hpp>
#include <winapi/process.hpp>
#include <winapi/utf8.hpp>
#include <boost/config.hpp>
#include <windows.h>
#include <cstring>
#include <utility>
#include <vector>
namespace winapi {
namespace {
typedef std::vector<wchar_t> EscapedCommandLine;
Handle create_process(EscapedCommandLine cmd_line) {
BOOST_STATIC_CONSTEXPR DWORD flags = CREATE_NO_WINDOW | CREATE_UNICODE_ENVIRONMENT;
STARTUPINFOW startup_info;
std::memset(&startup_info, 0, sizeof(startup_info));
startup_info.cb = sizeof(startup_info);
PROCESS_INFORMATION child_info;
std::memset(&child_info, 0, sizeof(child_info));
const auto ret = ::CreateProcessW(
NULL, cmd_line.data(), NULL, NULL, FALSE, flags, NULL, NULL, &startup_info, &child_info);
if (!ret) {
throw error::windows(GetLastError(), "CreateProcessW");
}
Handle h_process{child_info.hProcess};
Handle h_thread{child_info.hThread};
return std::move(h_process);
}
EscapedCommandLine escape_command_line(const CommandLine& cmd_line) {
const auto whole = widen(cmd_line.join());
return {whole.cbegin(), whole.cend()};
}
Handle create_process(const CommandLine& cmd_line) {
return create_process(escape_command_line(cmd_line));
}
} // namespace
Process Process::create(const CommandLine& cmd_line) {
return Process{create_process(cmd_line)};
}
void Process::wait() {
const auto ret = ::WaitForSingleObject(static_cast<HANDLE>(m_handle), INFINITE);
switch (ret) {
case WAIT_OBJECT_0:
m_handle = Handle{};
return;
case WAIT_FAILED:
throw error::windows(GetLastError(), "WaitForSingleObject");
default:
// Shouldn't happen.
throw error::custom(ret, "WaitForSingleObject");
}
}
} // namespace winapi
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