Replace boost by the standalone asio library

1 files changed, 343 insertions, 0 deletions

diff --git a/lib/asio/impl/io_context.hpp b/lib/asio/impl/io_context.hpp
new file mode 100644
index 0000000..eaf580d
--- /dev/null
+++ b/lib/asio/impl/io_context.hpp
@@ -0,0 +1,343 @@
+//
+// impl/io_context.hpp
+// ~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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)
+//
+
+#ifndef ASIO_IMPL_IO_CONTEXT_HPP
+#define ASIO_IMPL_IO_CONTEXT_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/completion_handler.hpp"
+#include "asio/detail/executor_op.hpp"
+#include "asio/detail/fenced_block.hpp"
+#include "asio/detail/handler_type_requirements.hpp"
+#include "asio/detail/recycling_allocator.hpp"
+#include "asio/detail/service_registry.hpp"
+#include "asio/detail/throw_error.hpp"
+#include "asio/detail/type_traits.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+template <typename Service>
+inline Service& use_service(io_context& ioc)
+{
+  // Check that Service meets the necessary type requirements.
+  (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
+  (void)static_cast<const execution_context::id*>(&Service::id);
+
+  return ioc.service_registry_->template use_service<Service>(ioc);
+}
+
+template <>
+inline detail::io_context_impl& use_service<detail::io_context_impl>(
+    io_context& ioc)
+{
+  return ioc.impl_;
+}
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HAS_IOCP)
+# include "asio/detail/win_iocp_io_context.hpp"
+#else
+# include "asio/detail/scheduler.hpp"
+#endif
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+
+inline io_context::executor_type
+io_context::get_executor() ASIO_NOEXCEPT
+{
+  return executor_type(*this);
+}
+
+#if defined(ASIO_HAS_CHRONO)
+
+template <typename Rep, typename Period>
+std::size_t io_context::run_for(
+    const chrono::duration<Rep, Period>& rel_time)
+{
+  return this->run_until(chrono::steady_clock::now() + rel_time);
+}
+
+template <typename Clock, typename Duration>
+std::size_t io_context::run_until(
+    const chrono::time_point<Clock, Duration>& abs_time)
+{
+  std::size_t n = 0;
+  while (this->run_one_until(abs_time))
+    if (n != (std::numeric_limits<std::size_t>::max)())
+      ++n;
+  return n;
+}
+
+template <typename Rep, typename Period>
+std::size_t io_context::run_one_for(
+    const chrono::duration<Rep, Period>& rel_time)
+{
+  return this->run_one_until(chrono::steady_clock::now() + rel_time);
+}
+
+template <typename Clock, typename Duration>
+std::size_t io_context::run_one_until(
+    const chrono::time_point<Clock, Duration>& abs_time)
+{
+  typename Clock::time_point now = Clock::now();
+  while (now < abs_time)
+  {
+    typename Clock::duration rel_time = abs_time - now;
+    if (rel_time > chrono::seconds(1))
+      rel_time = chrono::seconds(1);
+
+    asio::error_code ec;
+    std::size_t s = impl_.wait_one(
+        static_cast<long>(chrono::duration_cast<
+          chrono::microseconds>(rel_time).count()), ec);
+    asio::detail::throw_error(ec);
+
+    if (s || impl_.stopped())
+      return s;
+
+    now = Clock::now();
+  }
+
+  return 0;
+}
+
+#endif // defined(ASIO_HAS_CHRONO)
+
+#if !defined(ASIO_NO_DEPRECATED)
+
+inline void io_context::reset()
+{
+  restart();
+}
+
+template <typename LegacyCompletionHandler>
+ASIO_INITFN_RESULT_TYPE(LegacyCompletionHandler, void ())
+io_context::dispatch(ASIO_MOVE_ARG(LegacyCompletionHandler) handler)
+{
+  // If you get an error on the following line it means that your handler does
+  // not meet the documented type requirements for a LegacyCompletionHandler.
+  ASIO_LEGACY_COMPLETION_HANDLER_CHECK(
+      LegacyCompletionHandler, handler) type_check;
+
+  async_completion<LegacyCompletionHandler, void ()> init(handler);
+
+  if (impl_.can_dispatch())
+  {
+    detail::fenced_block b(detail::fenced_block::full);
+    asio_handler_invoke_helpers::invoke(
+        init.completion_handler, init.completion_handler);
+  }
+  else
+  {
+    // Allocate and construct an operation to wrap the handler.
+    typedef detail::completion_handler<
+      typename handler_type<LegacyCompletionHandler, void ()>::type> op;
+    typename op::ptr p = { detail::addressof(init.completion_handler),
+      op::ptr::allocate(init.completion_handler), 0 };
+    p.p = new (p.v) op(init.completion_handler);
+
+    ASIO_HANDLER_CREATION((*this, *p.p,
+          "io_context", this, 0, "dispatch"));
+
+    impl_.do_dispatch(p.p);
+    p.v = p.p = 0;
+  }
+
+  return init.result.get();
+}
+
+template <typename LegacyCompletionHandler>
+ASIO_INITFN_RESULT_TYPE(LegacyCompletionHandler, void ())
+io_context::post(ASIO_MOVE_ARG(LegacyCompletionHandler) handler)
+{
+  // If you get an error on the following line it means that your handler does
+  // not meet the documented type requirements for a LegacyCompletionHandler.
+  ASIO_LEGACY_COMPLETION_HANDLER_CHECK(
+      LegacyCompletionHandler, handler) type_check;
+
+  async_completion<LegacyCompletionHandler, void ()> init(handler);
+
+  bool is_continuation =
+    asio_handler_cont_helpers::is_continuation(init.completion_handler);
+
+  // Allocate and construct an operation to wrap the handler.
+  typedef detail::completion_handler<
+    typename handler_type<LegacyCompletionHandler, void ()>::type> op;
+  typename op::ptr p = { detail::addressof(init.completion_handler),
+      op::ptr::allocate(init.completion_handler), 0 };
+  p.p = new (p.v) op(init.completion_handler);
+
+  ASIO_HANDLER_CREATION((*this, *p.p,
+        "io_context", this, 0, "post"));
+
+  impl_.post_immediate_completion(p.p, is_continuation);
+  p.v = p.p = 0;
+
+  return init.result.get();
+}
+
+template <typename Handler>
+#if defined(GENERATING_DOCUMENTATION)
+unspecified
+#else
+inline detail::wrapped_handler<io_context&, Handler>
+#endif
+io_context::wrap(Handler handler)
+{
+  return detail::wrapped_handler<io_context&, Handler>(*this, handler);
+}
+
+#endif // !defined(ASIO_NO_DEPRECATED)
+
+inline io_context&
+io_context::executor_type::context() const ASIO_NOEXCEPT
+{
+  return io_context_;
+}
+
+inline void
+io_context::executor_type::on_work_started() const ASIO_NOEXCEPT
+{
+  io_context_.impl_.work_started();
+}
+
+inline void
+io_context::executor_type::on_work_finished() const ASIO_NOEXCEPT
+{
+  io_context_.impl_.work_finished();
+}
+
+template <typename Function, typename Allocator>
+void io_context::executor_type::dispatch(
+    ASIO_MOVE_ARG(Function) f, const Allocator& a) const
+{
+  typedef typename decay<Function>::type function_type;
+
+  // Invoke immediately if we are already inside the thread pool.
+  if (io_context_.impl_.can_dispatch())
+  {
+    // Make a local, non-const copy of the function.
+    function_type tmp(ASIO_MOVE_CAST(Function)(f));
+
+    detail::fenced_block b(detail::fenced_block::full);
+    asio_handler_invoke_helpers::invoke(tmp, tmp);
+    return;
+  }
+
+  // Allocate and construct an operation to wrap the function.
+  typedef detail::executor_op<function_type, Allocator, detail::operation> op;
+  typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 };
+  p.p = new (p.v) op(ASIO_MOVE_CAST(Function)(f), a);
+
+  ASIO_HANDLER_CREATION((this->context(), *p.p,
+        "io_context", &this->context(), 0, "post"));
+
+  io_context_.impl_.post_immediate_completion(p.p, false);
+  p.v = p.p = 0;
+}
+
+template <typename Function, typename Allocator>
+void io_context::executor_type::post(
+    ASIO_MOVE_ARG(Function) f, const Allocator& a) const
+{
+  typedef typename decay<Function>::type function_type;
+
+  // Allocate and construct an operation to wrap the function.
+  typedef detail::executor_op<function_type, Allocator, detail::operation> op;
+  typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 };
+  p.p = new (p.v) op(ASIO_MOVE_CAST(Function)(f), a);
+
+  ASIO_HANDLER_CREATION((this->context(), *p.p,
+        "io_context", &this->context(), 0, "post"));
+
+  io_context_.impl_.post_immediate_completion(p.p, false);
+  p.v = p.p = 0;
+}
+
+template <typename Function, typename Allocator>
+void io_context::executor_type::defer(
+    ASIO_MOVE_ARG(Function) f, const Allocator& a) const
+{
+  typedef typename decay<Function>::type function_type;
+
+  // Allocate and construct an operation to wrap the function.
+  typedef detail::executor_op<function_type, Allocator, detail::operation> op;
+  typename op::ptr p = { detail::addressof(a), op::ptr::allocate(a), 0 };
+  p.p = new (p.v) op(ASIO_MOVE_CAST(Function)(f), a);
+
+  ASIO_HANDLER_CREATION((this->context(), *p.p,
+        "io_context", &this->context(), 0, "defer"));
+
+  io_context_.impl_.post_immediate_completion(p.p, true);
+  p.v = p.p = 0;
+}
+
+inline bool
+io_context::executor_type::running_in_this_thread() const ASIO_NOEXCEPT
+{
+  return io_context_.impl_.can_dispatch();
+}
+
+#if !defined(ASIO_NO_DEPRECATED)
+inline io_context::work::work(asio::io_context& io_context)
+  : io_context_impl_(io_context.impl_)
+{
+  io_context_impl_.work_started();
+}
+
+inline io_context::work::work(const work& other)
+  : io_context_impl_(other.io_context_impl_)
+{
+  io_context_impl_.work_started();
+}
+
+inline io_context::work::~work()
+{
+  io_context_impl_.work_finished();
+}
+
+inline asio::io_context& io_context::work::get_io_context()
+{
+  return static_cast<asio::io_context&>(io_context_impl_.context());
+}
+
+inline asio::io_context& io_context::work::get_io_service()
+{
+  return static_cast<asio::io_context&>(io_context_impl_.context());
+}
+#endif // !defined(ASIO_NO_DEPRECATED)
+
+inline asio::io_context& io_context::service::get_io_context()
+{
+  return static_cast<asio::io_context&>(context());
+}
+
+#if !defined(ASIO_NO_DEPRECATED)
+inline asio::io_context& io_context::service::get_io_service()
+{
+  return static_cast<asio::io_context&>(context());
+}
+#endif // !defined(ASIO_NO_DEPRECATED)
+
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_IMPL_IO_CONTEXT_HPP