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Diffstat (limited to 'ksvg/impl/libs/libtext2path/src/myboost/shared_count.hpp')
| -rw-r--r-- | ksvg/impl/libs/libtext2path/src/myboost/shared_count.hpp | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/ksvg/impl/libs/libtext2path/src/myboost/shared_count.hpp b/ksvg/impl/libs/libtext2path/src/myboost/shared_count.hpp deleted file mode 100644 index e8ec19a8..00000000 --- a/ksvg/impl/libs/libtext2path/src/myboost/shared_count.hpp +++ /dev/null @@ -1,367 +0,0 @@ -#ifndef BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED -#define BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED - -// -// detail/shared_count.hpp -// -// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. -// -// Permission to copy, use, modify, sell and distribute this software -// is granted provided this copyright notice appears in all copies. -// This software is provided "as is" without express or implied -// warranty, and with no claim as to its suitability for any purpose. -// - -#include "myboost/checked_delete.hpp" -#include "myboost/throw_exception.hpp" -#include "myboost/lightweight_mutex.hpp" - -#include <memory> // std::auto_ptr, std::allocator -#include <functional> // std::less -#include <exception> // std::exception -#include <new> // std::bad_alloc -#include <typeinfo> // std::type_info in get_deleter -#include <cstddef> // std::size_t - -namespace myboost -{ - -class bad_weak_ptr: public std::exception -{ -public: - - virtual char const * what() const throw() - { - return "myboost::bad_weak_ptr"; - } -}; - -namespace detail -{ - -class sp_counted_base -{ -private: - - typedef detail::lightweight_mutex mutex_type; - -public: - - sp_counted_base(): use_count_(1), weak_count_(1) - { - } - - virtual ~sp_counted_base() // nothrow - { - } - - // dispose() is called when use_count_ drops to zero, to release - // the resources managed by *this. - - virtual void dispose() = 0; // nothrow - - // destruct() is called when weak_count_ drops to zero. - - virtual void destruct() // nothrow - { - delete this; - } - - virtual void * get_deleter(std::type_info const & ti) = 0; - - void add_ref_copy() - { - mutex_type::scoped_lock lock(mtx_); - ++use_count_; - } - - void add_ref_lock() - { - mutex_type::scoped_lock lock(mtx_); - if(use_count_ == 0) myboost::throw_exception(myboost::bad_weak_ptr()); - ++use_count_; - } - - void release() // nothrow - { - { - mutex_type::scoped_lock lock(mtx_); - long new_use_count = --use_count_; - - if(new_use_count != 0) return; - } - - dispose(); - weak_release(); - } - - void weak_add_ref() // nothrow - { - mutex_type::scoped_lock lock(mtx_); - ++weak_count_; - } - - void weak_release() // nothrow - { - long new_weak_count; - - { - mutex_type::scoped_lock lock(mtx_); - new_weak_count = --weak_count_; - } - - if(new_weak_count == 0) - { - destruct(); - } - } - - long use_count() const // nothrow - { - mutex_type::scoped_lock lock(mtx_); - return use_count_; - } - -private: - - sp_counted_base(sp_counted_base const &); - sp_counted_base & operator= (sp_counted_base const &); - - long use_count_; // #shared - long weak_count_; // #weak + (#shared != 0) - - mutable mutex_type mtx_; -}; - -template<class P, class D> class sp_counted_base_impl: public sp_counted_base -{ -private: - - P ptr; // copy constructor must not throw - D del; // copy constructor must not throw - - sp_counted_base_impl(sp_counted_base_impl const &); - sp_counted_base_impl & operator= (sp_counted_base_impl const &); - - typedef sp_counted_base_impl<P, D> this_type; - -public: - - // pre: initial_use_count <= initial_weak_count, d(p) must not throw - - sp_counted_base_impl(P p, D d): ptr(p), del(d) - { - } - - virtual void dispose() // nothrow - { - del(ptr); - } - - virtual void * get_deleter(std::type_info const & ti) - { - return ti == typeid(D)? &del: 0; - } - - void * operator new(std::size_t) - { - return std::allocator<this_type>().allocate(1, static_cast<this_type *>(0)); - } - - void operator delete(void * p) - { - std::allocator<this_type>().deallocate(static_cast<this_type *>(p), 1); - } -}; - -class weak_count; - -class shared_count -{ -private: - - sp_counted_base * pi_; - - friend class weak_count; - -public: - - shared_count(): pi_(0) // nothrow - { - } - - template<class P, class D> shared_count(P p, D d): pi_(0) - { - - try - { - pi_ = new sp_counted_base_impl<P, D>(p, d); - } - catch(...) - { - d(p); // delete p - throw; - } - - - pi_ = new sp_counted_base_impl<P, D>(p, d); - - if(pi_ == 0) - { - d(p); // delete p - myboost::throw_exception(std::bad_alloc()); - } - } - - // auto_ptr<Y> is special cased to provide the strong guarantee - - template<class Y> - explicit shared_count(std::auto_ptr<Y> & r): pi_(new sp_counted_base_impl< Y *, checked_deleter<Y> >(r.get(), checked_deleter<Y>())) - { - r.release(); - } - - ~shared_count() // nothrow - { - if(pi_ != 0) pi_->release(); - } - - shared_count(shared_count const & r): pi_(r.pi_) // nothrow - { - if(pi_ != 0) pi_->add_ref_copy(); - } - - explicit shared_count(weak_count const & r); // throws bad_weak_ptr when r.use_count() == 0 - - shared_count & operator= (shared_count const & r) // nothrow - { - sp_counted_base * tmp = r.pi_; - if(tmp != 0) tmp->add_ref_copy(); - if(pi_ != 0) pi_->release(); - pi_ = tmp; - - return *this; - } - - void swap(shared_count & r) // nothrow - { - sp_counted_base * tmp = r.pi_; - r.pi_ = pi_; - pi_ = tmp; - } - - long use_count() const // nothrow - { - return pi_ != 0? pi_->use_count(): 0; - } - - bool unique() const // nothrow - { - return use_count() == 1; - } - - friend inline bool operator==(shared_count const & a, shared_count const & b) - { - return a.pi_ == b.pi_; - } - - friend inline bool operator<(shared_count const & a, shared_count const & b) - { - return std::less<sp_counted_base *>()(a.pi_, b.pi_); - } - - void * get_deleter(std::type_info const & ti) const - { - return pi_? pi_->get_deleter(ti): 0; - } -}; - -class weak_count -{ -private: - - sp_counted_base * pi_; - - friend class shared_count; - -public: - - weak_count(): pi_(0) // nothrow - { - } - - weak_count(shared_count const & r): pi_(r.pi_) // nothrow - { - if(pi_ != 0) pi_->weak_add_ref(); - } - - weak_count(weak_count const & r): pi_(r.pi_) // nothrow - { - if(pi_ != 0) pi_->weak_add_ref(); - } - - ~weak_count() // nothrow - { - if(pi_ != 0) pi_->weak_release(); - } - - weak_count & operator= (shared_count const & r) // nothrow - { - sp_counted_base * tmp = r.pi_; - if(tmp != 0) tmp->weak_add_ref(); - if(pi_ != 0) pi_->weak_release(); - pi_ = tmp; - - return *this; - } - - weak_count & operator= (weak_count const & r) // nothrow - { - sp_counted_base * tmp = r.pi_; - if(tmp != 0) tmp->weak_add_ref(); - if(pi_ != 0) pi_->weak_release(); - pi_ = tmp; - - return *this; - } - - void swap(weak_count & r) // nothrow - { - sp_counted_base * tmp = r.pi_; - r.pi_ = pi_; - pi_ = tmp; - } - - long use_count() const // nothrow - { - return pi_ != 0? pi_->use_count(): 0; - } - - friend inline bool operator==(weak_count const & a, weak_count const & b) - { - return a.pi_ == b.pi_; - } - - friend inline bool operator<(weak_count const & a, weak_count const & b) - { - return std::less<sp_counted_base *>()(a.pi_, b.pi_); - } -}; - -inline shared_count::shared_count(weak_count const & r): pi_(r.pi_) -{ - if(pi_ != 0) - { - pi_->add_ref_lock(); - } - else - { - myboost::throw_exception(myboost::bad_weak_ptr()); - } -} - -} // namespace detail - -} // namespace myboost - -#endif // #ifndef BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED |