boost/interprocess/sync/windows/named_condition_any.hpp
//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2011-2012. 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)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTERPROCESS_WINDOWS_NAMED_CONDITION_ANY_HPP
#define BOOST_INTERPROCESS_WINDOWS_NAMED_CONDITION_ANY_HPP
#ifndef BOOST_CONFIG_HPP
# include <boost/config.hpp>
#endif
#
#if defined(BOOST_HAS_PRAGMA_ONCE)
# pragma once
#endif
#include <boost/interprocess/detail/config_begin.hpp>
#include <boost/interprocess/detail/workaround.hpp>
#include <boost/interprocess/sync/cv_status.hpp>
#include <boost/interprocess/creation_tags.hpp>
#include <boost/interprocess/permissions.hpp>
#include <boost/interprocess/detail/interprocess_tester.hpp>
#include <boost/interprocess/sync/windows/named_sync.hpp>
#include <boost/interprocess/sync/windows/winapi_semaphore_wrapper.hpp>
#include <boost/interprocess/sync/detail/condition_algorithm_8a.hpp>
#include <boost/interprocess/timed_utils.hpp>
namespace boost {
namespace interprocess {
namespace ipcdetail {
template<class CharT>
struct named_cond_callbacks_str;
template<>
struct named_cond_callbacks_str<char>
{
static const char* ipc_cond()
{ return "Global\\bipc.cond."; }
static const char* bq()
{ return "_bq"; }
static const char* bl()
{ return "_bl"; }
static const char* ul()
{ return "_ul"; }
};
template<>
struct named_cond_callbacks_str<wchar_t>
{
static const wchar_t* ipc_cond()
{ return L"Global\\bipc.cond."; }
static const wchar_t* bq()
{ return L"_bq"; }
static const wchar_t* bl()
{ return L"_bl"; }
static const wchar_t* ul()
{ return L"_ul"; }
};
class winapi_named_condition_any
{
#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
//Non-copyable
winapi_named_condition_any();
winapi_named_condition_any(const winapi_named_condition_any &);
winapi_named_condition_any &operator=(const winapi_named_condition_any &);
#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
public:
winapi_named_condition_any
(create_only_t, const char *name, const permissions &perm = permissions())
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoCreate, name, perm, callbacks);
}
winapi_named_condition_any
(open_or_create_t, const char *name, const permissions &perm = permissions())
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoOpenOrCreate, name, perm, callbacks);
}
winapi_named_condition_any(open_only_t, const char *name)
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoOpen, name, permissions(), callbacks);
}
#if defined(BOOST_INTERPROCESS_WCHAR_NAMED_RESOURCES) || defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
winapi_named_condition_any
(create_only_t, const wchar_t *name, const permissions &perm = permissions())
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoCreate, name, perm, callbacks);
}
winapi_named_condition_any
(open_or_create_t, const wchar_t *name, const permissions &perm = permissions())
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoOpenOrCreate, name, perm, callbacks);
}
winapi_named_condition_any(open_only_t, const wchar_t *name)
: m_condition_data()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.open_or_create(DoOpen, name, permissions(), callbacks);
}
#endif //defined(BOOST_INTERPROCESS_WCHAR_NAMED_RESOURCES) || defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
~winapi_named_condition_any()
{
named_cond_callbacks callbacks(m_condition_data.get_members());
m_named_sync.close(callbacks);
}
void notify_one()
{ m_condition_data.notify_one(); }
void notify_all()
{ m_condition_data.notify_all(); }
template <typename L, typename TimePoint>
bool timed_wait(L& lock, const TimePoint &abs_time)
{ return m_condition_data.timed_wait(lock, abs_time); }
template <typename L, typename TimePoint, typename Pr>
bool timed_wait(L& lock, const TimePoint &abs_time, Pr pred)
{ return m_condition_data.timed_wait(lock, abs_time, pred); }
template <typename L>
void wait(L& lock)
{ m_condition_data.wait(lock); }
template <typename L, typename Pr>
void wait(L& lock, Pr pred)
{ m_condition_data.wait(lock, pred); }
template <typename L, class TimePoint>
cv_status wait_until(L& lock, const TimePoint &abs_time)
{ return this->timed_wait(lock, abs_time) ? cv_status::no_timeout : cv_status::timeout; }
template <typename L, class TimePoint, typename Pr>
bool wait_until(L& lock, const TimePoint &abs_time, Pr pred)
{ return this->timed_wait(lock, abs_time, pred); }
template <typename L, class Duration>
cv_status wait_for(L& lock, const Duration &dur)
{ return this->wait_until(lock, ipcdetail::duration_to_ustime(dur)); }
template <typename L, class Duration, typename Pr>
bool wait_for(L& lock, const Duration &dur, Pr pred)
{ return this->wait_until(lock, ipcdetail::duration_to_ustime(dur), pred); }
static bool remove(const char *name)
{ return windows_named_sync::remove(name); }
static bool remove(const wchar_t *name)
{ return windows_named_sync::remove(name); }
#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
private:
void dont_close_on_destruction()
{}
friend class interprocess_tester;
struct condition_data
{
typedef boost::int32_t integer_type;
typedef winapi_semaphore_wrapper semaphore_type;
typedef winapi_mutex_wrapper mutex_type;
integer_type &get_nwaiters_blocked()
{ return m_nwaiters_blocked; }
integer_type &get_nwaiters_gone()
{ return m_nwaiters_gone; }
integer_type &get_nwaiters_to_unblock()
{ return m_nwaiters_to_unblock; }
semaphore_type &get_sem_block_queue()
{ return m_sem_block_queue; }
semaphore_type &get_sem_block_lock()
{ return m_sem_block_lock; }
mutex_type &get_mtx_unblock_lock()
{ return m_mtx_unblock_lock; }
integer_type m_nwaiters_blocked;
integer_type m_nwaiters_gone;
integer_type m_nwaiters_to_unblock;
winapi_semaphore_wrapper m_sem_block_queue;
winapi_semaphore_wrapper m_sem_block_lock;
winapi_mutex_wrapper m_mtx_unblock_lock;
};
class named_cond_callbacks : public windows_named_sync_interface
{
typedef __int64 sem_count_t;
mutable sem_count_t sem_counts [2];
public:
named_cond_callbacks(condition_data &cond_data)
: m_condition_data(cond_data)
{}
virtual std::size_t get_data_size() const BOOST_OVERRIDE
{ return sizeof(sem_counts); }
virtual const void *buffer_with_final_data_to_file() BOOST_OVERRIDE
{
sem_counts[0] = m_condition_data.m_sem_block_queue.value();
sem_counts[1] = m_condition_data.m_sem_block_lock.value();
return &sem_counts;
}
virtual const void *buffer_with_init_data_to_file() BOOST_OVERRIDE
{
sem_counts[0] = 0;
sem_counts[1] = 1;
return &sem_counts;
}
virtual void *buffer_to_store_init_data_from_file() BOOST_OVERRIDE
{ return &sem_counts; }
virtual bool open(create_enum_t op, const char *id_name) BOOST_OVERRIDE
{ return this->open_impl(op, id_name); }
virtual bool open(create_enum_t op, const wchar_t *id_name) BOOST_OVERRIDE
{ return this->open_impl(op, id_name); }
virtual void close() BOOST_OVERRIDE
{
m_condition_data.m_sem_block_queue.close();
m_condition_data.m_sem_block_lock.close();
m_condition_data.m_mtx_unblock_lock.close();
m_condition_data.m_nwaiters_blocked = 0;
m_condition_data.m_nwaiters_gone = 0;
m_condition_data.m_nwaiters_to_unblock = 0;
}
virtual ~named_cond_callbacks() BOOST_OVERRIDE
{}
private:
template<class CharT>
bool open_impl(create_enum_t, const CharT *id_name)
{
typedef named_cond_callbacks_str<CharT> str_t;
m_condition_data.m_nwaiters_blocked = 0;
m_condition_data.m_nwaiters_gone = 0;
m_condition_data.m_nwaiters_to_unblock = 0;
//Now open semaphores and mutex.
//Use local variables + swap to guarantee consistent
//initialization and cleanup in case any opening fails
permissions perm;
perm.set_unrestricted();
std::basic_string<CharT> aux_str = str_t::ipc_cond();
aux_str += id_name;
std::size_t pos = aux_str.size();
//sem_block_queue
aux_str += str_t::bq();
winapi_semaphore_wrapper sem_block_queue;
bool created;
if(!sem_block_queue.open_or_create
(aux_str.c_str(), static_cast<long>(sem_counts[0]), winapi_semaphore_wrapper::MaxCount, perm, created))
return false;
aux_str.erase(pos);
//sem_block_lock
aux_str += str_t::bl();
winapi_semaphore_wrapper sem_block_lock;
if(!sem_block_lock.open_or_create
(aux_str.c_str(), static_cast<long>(sem_counts[1]), winapi_semaphore_wrapper::MaxCount, perm, created))
return false;
aux_str.erase(pos);
//mtx_unblock_lock
aux_str += str_t::ul();
winapi_mutex_wrapper mtx_unblock_lock;
if(!mtx_unblock_lock.open_or_create(aux_str.c_str(), perm))
return false;
//All ok, commit data
m_condition_data.m_sem_block_queue.swap(sem_block_queue);
m_condition_data.m_sem_block_lock.swap(sem_block_lock);
m_condition_data.m_mtx_unblock_lock.swap(mtx_unblock_lock);
return true;
}
condition_data &m_condition_data;
};
windows_named_sync m_named_sync;
ipcdetail::condition_8a_wrapper<condition_data> m_condition_data;
#endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
};
} //namespace ipcdetail {
} //namespace interprocess {
} //namespace boost {
#include <boost/interprocess/detail/config_end.hpp>
#endif //BOOST_INTERPROCESS_WINDOWS_NAMED_CONDITION_ANY_HPP