Added boost header

test/external/boost/thread/win32/condition_variable.hpp

@@ -0,0 +1,418 @@
+#ifndef BOOST_THREAD_CONDITION_VARIABLE_WIN32_HPP
+#define BOOST_THREAD_CONDITION_VARIABLE_WIN32_HPP
+// 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)
+// (C) Copyright 2007-8 Anthony Williams
+
+#include <boost/thread/mutex.hpp>
+#include "thread_primitives.hpp"
+#include <limits.h>
+#include <boost/assert.hpp>
+#include <algorithm>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/thread_time.hpp>
+#include "interlocked_read.hpp"
+#include <boost/thread/xtime.hpp>
+#include <vector>
+#include <boost/intrusive_ptr.hpp>
+
+#include <boost/config/abi_prefix.hpp>
+
+namespace boost
+{
+    namespace detail
+    {
+        class basic_cv_list_entry;
+        void intrusive_ptr_add_ref(basic_cv_list_entry * p);
+        void intrusive_ptr_release(basic_cv_list_entry * p);
+        
+        class basic_cv_list_entry
+        {
+        private:
+            detail::win32::handle_manager semaphore;
+            detail::win32::handle_manager wake_sem;
+            long waiters;
+            bool notified;
+            long references;
+
+            basic_cv_list_entry(basic_cv_list_entry&);
+            void operator=(basic_cv_list_entry&);
+            
+        public:
+            explicit basic_cv_list_entry(detail::win32::handle_manager const& wake_sem_):
+                semaphore(detail::win32::create_anonymous_semaphore(0,LONG_MAX)),
+                wake_sem(wake_sem_.duplicate()),
+                waiters(1),notified(false),references(0)
+            {}
+
+            static bool no_waiters(boost::intrusive_ptr<basic_cv_list_entry> const& entry)
+            {
+                return !detail::interlocked_read_acquire(&entry->waiters);
+            }
+
+            void add_waiter()
+            {
+                BOOST_INTERLOCKED_INCREMENT(&waiters);
+            }
+            
+            void remove_waiter()
+            {
+                BOOST_INTERLOCKED_DECREMENT(&waiters);
+            }
+
+            void release(unsigned count_to_release)
+            {
+                notified=true;
+                detail::win32::ReleaseSemaphore(semaphore,count_to_release,0);
+            }
+
+            void release_waiters()
+            {
+                release(detail::interlocked_read_acquire(&waiters));
+            }
+
+            bool is_notified() const
+            {
+                return notified;
+            }
+
+            bool wait(timeout wait_until)
+            {
+                return this_thread::interruptible_wait(semaphore,wait_until);
+            }
+
+            bool woken()
+            {
+                unsigned long const woken_result=detail::win32::WaitForSingleObject(wake_sem,0);
+                BOOST_ASSERT((woken_result==detail::win32::timeout) || (woken_result==0));
+                return woken_result==0;
+            }
+
+            friend void intrusive_ptr_add_ref(basic_cv_list_entry * p);
+            friend void intrusive_ptr_release(basic_cv_list_entry * p);
+        };
+
+        inline void intrusive_ptr_add_ref(basic_cv_list_entry * p)
+        {
+            BOOST_INTERLOCKED_INCREMENT(&p->references);
+        }
+            
+        inline void intrusive_ptr_release(basic_cv_list_entry * p)
+        {
+            if(!BOOST_INTERLOCKED_DECREMENT(&p->references))
+            {
+                delete p;
+            }
+        }
+
+        class basic_condition_variable
+        {
+            boost::mutex internal_mutex;
+            long total_count;
+            unsigned active_generation_count;
+
+            typedef basic_cv_list_entry list_entry;
+
+            typedef boost::intrusive_ptr<list_entry> entry_ptr;
+            typedef std::vector<entry_ptr> generation_list;
+
+            generation_list generations;
+            detail::win32::handle_manager wake_sem;
+
+            void wake_waiters(long count_to_wake)
+            {
+                detail::interlocked_write_release(&total_count,total_count-count_to_wake);
+                detail::win32::ReleaseSemaphore(wake_sem,count_to_wake,0);
+            }
+            
+            template<typename lock_type>
+            struct relocker
+            {
+                lock_type& lock;
+                bool unlocked;
+                
+                relocker(lock_type& lock_):
+                    lock(lock_),unlocked(false)
+                {}
+                void unlock()
+                {
+                    lock.unlock();
+                    unlocked=true;
+                }
+                ~relocker()
+                {
+                    if(unlocked)
+                    {
+                        lock.lock();
+                    }
+                    
+                }
+            private:
+                relocker(relocker&);
+                void operator=(relocker&);
+            };
+            
+
+            entry_ptr get_wait_entry()
+            {
+                boost::lock_guard<boost::mutex> internal_lock(internal_mutex);
+
+                if(!wake_sem)
+                {
+                    wake_sem=detail::win32::create_anonymous_semaphore(0,LONG_MAX);
+                    BOOST_ASSERT(wake_sem);
+                }
+
+                detail::interlocked_write_release(&total_count,total_count+1);
+                if(generations.empty() || generations.back()->is_notified())
+                {
+                    entry_ptr new_entry(new list_entry(wake_sem));
+                    generations.push_back(new_entry);
+                    return new_entry;
+                }
+                else
+                {
+                    generations.back()->add_waiter();
+                    return generations.back();
+                }
+            }
+            
+            struct entry_manager
+            {
+                entry_ptr const entry;
+                    
+                entry_manager(entry_ptr const& entry_):
+                    entry(entry_)
+                {}
+                    
+                ~entry_manager()
+                {
+                    entry->remove_waiter();
+                }
+
+                list_entry* operator->()
+                {
+                    return entry.get();
+                }
+
+            private:
+                void operator=(entry_manager&);
+                entry_manager(entry_manager&);
+            };
+                
+
+        protected:
+            template<typename lock_type>
+            bool do_wait(lock_type& lock,timeout wait_until)
+            {
+                relocker<lock_type> locker(lock);
+                
+                entry_manager entry(get_wait_entry());
+
+                locker.unlock();
+
+                bool woken=false;
+                while(!woken)
+                {
+                    if(!entry->wait(wait_until))
+                    {
+                        return false;
+                    }
+                
+                    woken=entry->woken();
+                }
+                return woken;
+            }
+
+            template<typename lock_type,typename predicate_type>
+            bool do_wait(lock_type& m,timeout const& wait_until,predicate_type pred)
+            {
+                while (!pred())
+                {
+                    if(!do_wait(m, wait_until))
+                        return pred();
+                }
+                return true;
+            }
+        
+            basic_condition_variable(const basic_condition_variable& other);
+            basic_condition_variable& operator=(const basic_condition_variable& other);
+
+        public:
+            basic_condition_variable():
+                total_count(0),active_generation_count(0),wake_sem(0)
+            {}
+            
+            ~basic_condition_variable()
+            {}
+
+            void notify_one()
+            {
+                if(detail::interlocked_read_acquire(&total_count))
+                {
+                    boost::lock_guard<boost::mutex> internal_lock(internal_mutex);
+                    if(!total_count)
+                    {
+                        return;
+                    }
+                    wake_waiters(1);
+
+                    for(generation_list::iterator it=generations.begin(),
+                            end=generations.end();
+                        it!=end;++it)
+                    {
+                        (*it)->release(1);
+                    }
+                    generations.erase(std::remove_if(generations.begin(),generations.end(),&basic_cv_list_entry::no_waiters),generations.end());
+                }
+            }
+        
+            void notify_all()
+            {
+                if(detail::interlocked_read_acquire(&total_count))
+                {
+                    boost::lock_guard<boost::mutex> internal_lock(internal_mutex);
+                    if(!total_count)
+                    {
+                        return;
+                    }
+                    wake_waiters(total_count);
+                    for(generation_list::iterator it=generations.begin(),
+                            end=generations.end();
+                        it!=end;++it)
+                    {
+                        (*it)->release_waiters();
+                    }
+                    generations.clear();
+                    wake_sem=detail::win32::handle(0);
+                }
+            }
+        
+        };
+    }
+
+    class condition_variable:
+        private detail::basic_condition_variable
+    {
+    private:
+        condition_variable(condition_variable&);
+        void operator=(condition_variable&);
+    public:
+        condition_variable()
+        {}
+        
+        using detail::basic_condition_variable::notify_one;
+        using detail::basic_condition_variable::notify_all;
+        
+        void wait(unique_lock<mutex>& m)
+        {
+            do_wait(m,detail::timeout::sentinel());
+        }
+
+        template<typename predicate_type>
+        void wait(unique_lock<mutex>& m,predicate_type pred)
+        {
+            while(!pred()) wait(m);
+        }
+        
+
+        bool timed_wait(unique_lock<mutex>& m,boost::system_time const& wait_until)
+        {
+            return do_wait(m,wait_until);
+        }
+
+        bool timed_wait(unique_lock<mutex>& m,boost::xtime const& wait_until)
+        {
+            return do_wait(m,system_time(wait_until));
+        }
+        template<typename duration_type>
+        bool timed_wait(unique_lock<mutex>& m,duration_type const& wait_duration)
+        {
+            return do_wait(m,wait_duration.total_milliseconds());
+        }
+
+        template<typename predicate_type>
+        bool timed_wait(unique_lock<mutex>& m,boost::system_time const& wait_until,predicate_type pred)
+        {
+            return do_wait(m,wait_until,pred);
+        }
+        template<typename predicate_type>
+        bool timed_wait(unique_lock<mutex>& m,boost::xtime const& wait_until,predicate_type pred)
+        {
+            return do_wait(m,system_time(wait_until),pred);
+        }
+        template<typename duration_type,typename predicate_type>
+        bool timed_wait(unique_lock<mutex>& m,duration_type const& wait_duration,predicate_type pred)
+        {
+            return do_wait(m,wait_duration.total_milliseconds(),pred);
+        }
+    };
+    
+    class condition_variable_any:
+        private detail::basic_condition_variable
+    {
+    private:
+        condition_variable_any(condition_variable_any&);
+        void operator=(condition_variable_any&);
+    public:
+        condition_variable_any()
+        {}
+        
+        using detail::basic_condition_variable::notify_one;
+        using detail::basic_condition_variable::notify_all;
+        
+        template<typename lock_type>
+        void wait(lock_type& m)
+        {
+            do_wait(m,detail::timeout::sentinel());
+        }
+
+        template<typename lock_type,typename predicate_type>
+        void wait(lock_type& m,predicate_type pred)
+        {
+            while(!pred()) wait(m);
+        }
+        
+        template<typename lock_type>
+        bool timed_wait(lock_type& m,boost::system_time const& wait_until)
+        {
+            return do_wait(m,wait_until);
+        }
+
+        template<typename lock_type>
+        bool timed_wait(lock_type& m,boost::xtime const& wait_until)
+        {
+            return do_wait(m,system_time(wait_until));
+        }
+
+        template<typename lock_type,typename duration_type>
+        bool timed_wait(lock_type& m,duration_type const& wait_duration)
+        {
+            return do_wait(m,wait_duration.total_milliseconds());
+        }
+
+        template<typename lock_type,typename predicate_type>
+        bool timed_wait(lock_type& m,boost::system_time const& wait_until,predicate_type pred)
+        {
+            return do_wait(m,wait_until,pred);
+        }
+
+        template<typename lock_type,typename predicate_type>
+        bool timed_wait(lock_type& m,boost::xtime const& wait_until,predicate_type pred)
+        {
+            return do_wait(m,system_time(wait_until),pred);
+        }
+
+        template<typename lock_type,typename duration_type,typename predicate_type>
+        bool timed_wait(lock_type& m,duration_type const& wait_duration,predicate_type pred)
+        {
+            return do_wait(m,wait_duration.total_milliseconds(),pred);
+        }
+    };
+
+}
+
+#include <boost/config/abi_suffix.hpp>
+
+#endif