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Diffstat (limited to 'boost/fiber/unbounded_channel.hpp')
-rw-r--r-- | boost/fiber/unbounded_channel.hpp | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/boost/fiber/unbounded_channel.hpp b/boost/fiber/unbounded_channel.hpp deleted file mode 100644 index 6de5a6f5f0..0000000000 --- a/boost/fiber/unbounded_channel.hpp +++ /dev/null @@ -1,272 +0,0 @@ - -// Copyright Oliver Kowalke 2013. -// 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 BOOST_FIBERS_UNBOUNDED_CHANNEL_H -#define BOOST_FIBERS_UNBOUNDED_CHANNEL_H - -#warn "template unbounded_channel is deprecated" - -#include <atomic> -#include <algorithm> -#include <chrono> -#include <cstddef> -#include <deque> -#include <memory> -#include <mutex> -#include <utility> - -#include <boost/config.hpp> -#include <boost/intrusive_ptr.hpp> - -#include <boost/fiber/detail/config.hpp> -#include <boost/fiber/channel_op_status.hpp> -#include <boost/fiber/condition_variable.hpp> -#include <boost/fiber/detail/convert.hpp> -#include <boost/fiber/exceptions.hpp> -#include <boost/fiber/mutex.hpp> -#include <boost/fiber/operations.hpp> - -#ifdef BOOST_HAS_ABI_HEADERS -# include BOOST_ABI_PREFIX -#endif - -namespace boost { -namespace fibers { - -template< typename T, - typename Allocator = std::allocator< T > -> -class unbounded_channel { -public: - typedef T value_type; - -private: - struct node { - typedef intrusive_ptr< node > ptr_t; - typedef typename std::allocator_traits< Allocator >::template rebind_alloc< - node - > allocator_t; - typedef std::allocator_traits< allocator_t > allocator_traits_t; - -#if ! defined(BOOST_FIBERS_NO_ATOMICS) - std::atomic< std::size_t > use_count{ 0 }; -#else - std::size_t use_count{ 0 }; -#endif - allocator_t alloc; - T va; - ptr_t nxt{}; - - node( T const& t, allocator_t const& alloc_) noexcept : - alloc{ alloc_ }, - va{ t } { - } - - node( T && t, allocator_t const& alloc_) noexcept : - alloc{ alloc_ }, - va{ std::move( t) } { - } - - friend - void intrusive_ptr_add_ref( node * p) noexcept { - ++p->use_count; - } - - friend - void intrusive_ptr_release( node * p) noexcept { - if ( 0 == --p->use_count) { - allocator_t alloc( p->alloc); - allocator_traits_t::destroy( alloc, p); - allocator_traits_t::deallocate( alloc, p, 1); - } - } - }; - - using ptr_t = typename node::ptr_t; - using allocator_t = typename node::allocator_t; - using allocator_traits_t = typename node::allocator_traits_t; - - enum class queue_status { - open = 0, - closed - }; - - allocator_t alloc_; - queue_status state_{ queue_status::open }; - ptr_t head_{}; - ptr_t * tail_; - mutable mutex mtx_{}; - condition_variable not_empty_cond_{}; - - bool is_closed_() const noexcept { - return queue_status::closed == state_; - } - - void close_( std::unique_lock< mutex > & lk) noexcept { - state_ = queue_status::closed; - lk.unlock(); - not_empty_cond_.notify_all(); - } - - bool is_empty_() const noexcept { - return ! head_; - } - - channel_op_status push_( ptr_t new_node, - std::unique_lock< mutex > & lk) noexcept { - if ( is_closed_() ) { - return channel_op_status::closed; - } - return push_and_notify_( new_node, lk); - } - - channel_op_status push_and_notify_( ptr_t new_node, - std::unique_lock< mutex > & lk) noexcept { - push_tail_( new_node); - lk.unlock(); - not_empty_cond_.notify_one(); - return channel_op_status::success; - } - - void push_tail_( ptr_t new_node) noexcept { - * tail_ = new_node; - tail_ = & new_node->nxt; - } - - value_type value_pop_( std::unique_lock< mutex > & lk) { - BOOST_ASSERT( ! is_empty_() ); - auto old_head = pop_head_(); - return std::move( old_head->va); - } - - ptr_t pop_head_() noexcept { - auto old_head = head_; - head_ = old_head->nxt; - if ( ! head_) { - tail_ = & head_; - } - old_head->nxt.reset(); - return old_head; - } - -public: - explicit unbounded_channel( Allocator const& alloc = Allocator() ) noexcept : - alloc_{ alloc }, - tail_{ & head_ } { - } - - unbounded_channel( unbounded_channel const&) = delete; - unbounded_channel & operator=( unbounded_channel const&) = delete; - - void close() noexcept { - std::unique_lock< mutex > lk( mtx_); - close_( lk); - } - - channel_op_status push( value_type const& va) { - typename allocator_traits_t::pointer ptr{ - allocator_traits_t::allocate( alloc_, 1) }; - try { - allocator_traits_t::construct( alloc_, ptr, va, alloc_); - } catch (...) { - allocator_traits_t::deallocate( alloc_, ptr, 1); - throw; - } - std::unique_lock< mutex > lk( mtx_); - return push_( { detail::convert( ptr) }, lk); - } - - channel_op_status push( value_type && va) { - typename allocator_traits_t::pointer ptr{ - allocator_traits_t::allocate( alloc_, 1) }; - try { - allocator_traits_t::construct( - alloc_, ptr, std::move( va), alloc_); - } catch (...) { - allocator_traits_t::deallocate( alloc_, ptr, 1); - throw; - } - std::unique_lock< mutex > lk( mtx_); - return push_( { detail::convert( ptr) }, lk); - } - - channel_op_status pop( value_type & va) { - std::unique_lock< mutex > lk( mtx_); - not_empty_cond_.wait( lk, - [this](){ - return is_closed_() || ! is_empty_(); - }); - if ( is_closed_() && is_empty_() ) { - return channel_op_status::closed; - } - va = value_pop_( lk); - return channel_op_status::success; - } - - value_type value_pop() { - std::unique_lock< mutex > lk( mtx_); - not_empty_cond_.wait( lk, - [this](){ - return is_closed_() || ! is_empty_(); - }); - if ( is_closed_() && is_empty_() ) { - throw fiber_error( - std::make_error_code( std::errc::operation_not_permitted), - "boost fiber: queue is closed"); - } - return value_pop_( lk); - } - - channel_op_status try_pop( value_type & va) { - std::unique_lock< mutex > lk( mtx_); - if ( is_closed_() && is_empty_() ) { - // let other fibers run - lk.unlock(); - this_fiber::yield(); - return channel_op_status::closed; - } - if ( is_empty_() ) { - // let other fibers run - lk.unlock(); - this_fiber::yield(); - return channel_op_status::empty; - } - va = value_pop_( lk); - return channel_op_status::success; - } - - template< typename Rep, typename Period > - channel_op_status pop_wait_for( value_type & va, - std::chrono::duration< Rep, Period > const& timeout_duration) { - return pop_wait_until( va, std::chrono::steady_clock::now() + timeout_duration); - } - - template< typename Clock, typename Duration > - channel_op_status pop_wait_until( value_type & va, - std::chrono::time_point< Clock, Duration > const& timeout_time) { - std::unique_lock< mutex > lk( mtx_); - if ( ! not_empty_cond_.wait_until( lk, timeout_time, - [this](){ - return is_closed_() || ! is_empty_(); - })) { - return channel_op_status::timeout; - } - if ( is_closed_() && is_empty_() ) { - return channel_op_status::closed; - } - va = value_pop_( lk); - return channel_op_status::success; - } -}; - -}} - -#ifdef BOOST_HAS_ABI_HEADERS -# include BOOST_ABI_SUFFIX -#endif - -#endif // BOOST_FIBERS_UNBOUNDED_CHANNEL_H |