整理

include/boost/process/v1/spawn.hpp

@@ -0,0 +1,69 @@
+// Copyright (c) 2006, 2007 Julio M. Merino Vidal
+// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
+// Copyright (c) 2009 Boris Schaeling
+// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
+// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
+// Copyright (c) 2016 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+/**
+ * \file boost/process/spawn.hpp
+ *
+ * Defines the spawn function.
+ */
+
+#ifndef BOOST_PROCESS_SPAWN_HPP
+#define BOOST_PROCESS_SPAWN_HPP
+
+#include <boost/process/v1/detail/config.hpp>
+#include <boost/process/v1/detail/child_decl.hpp>
+#include <boost/process/v1/detail/execute_impl.hpp>
+#include <boost/process/v1/detail/async_handler.hpp>
+
+#if defined(BOOST_POSIX_API)
+#include <boost/process/v1/posix.hpp>
+#endif
+
+namespace boost {
+
+namespace process { BOOST_PROCESS_V1_INLINE namespace v1 {
+
+namespace detail {
+
+}
+
+/** Launch a process and detach it. Returns no handle.
+
+This function starts a process and immediately detaches it. It thereby prevents the system from creating a zombie process,
+but will also cause the system to be unable to wait for the child to exit.
+
+\note This will set `SIGCHLD` to `SIGIGN` on posix.
+
+\warning This function does not allow asynchronous operations, since it cannot wait for the end of the process.
+It will fail to compile if a reference to `boost::asio::io_context` is passed.
+
+ */
+template<typename ...Args>
+inline void spawn(Args && ...args)
+{
+    typedef typename ::boost::process::v1::detail::has_async_handler<Args...>::type
+            has_async;
+
+
+    static_assert(
+            !has_async::value,
+            "Spawn cannot wait for exit, so async properties cannot be used");
+
+    auto c = ::boost::process::v1::detail::execute_impl(
+#if defined(BOOST_POSIX_API)
+            ::boost::process::v1::posix::sig.ign(),
+#endif
+             std::forward<Args>(args)...);
+    c.detach();
+}
+
+}}}
+
+#endif