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__gnu_debug__Safe_sequence_base

NAME

__gnu_debug::_Safe_sequence_base - Base class that supports tracking of iterators that reference a sequence.

SYNOPSIS

Inherited by __gnu_debug::_Safe_sequence< _Sequence >, __gnu_debug::_Safe_sequence< basic_string< _CharT, _Traits, _Allocator > >, __gnu_debug::_Safe_sequence< deque< _Tp, _Allocator > >, __gnu_debug::_Safe_sequence< hash_map< _Value, _Tp, _HashFcn, _EqualKey, _Alloc > >, __gnu_debug::_Safe_sequence< hash_multimap< _Value, _Tp, _HashFcn, _EqualKey, _Alloc > >, __gnu_debug::_Safe_sequence< hash_multiset< _Value, _HashFcn, _EqualKey, _Alloc > >, __gnu_debug::_Safe_sequence< hash_set< _Value, _HashFcn, _EqualKey, _Alloc > >, __gnu_debug::_Safe_sequence< list< _Tp, _Allocator > >, __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >, __gnu_debug::_Safe_sequence< multimap< _Key, _Tp, _Compare, _Allocator > >, __gnu_debug::_Safe_sequence< multiset< _Key, _Compare, _Allocator > >, __gnu_debug::_Safe_sequence< set< _Key, _Compare, _Allocator > >, __gnu_debug::_Safe_sequence< vector< _Tp, _Allocator > >, and std::__debug::bitset< _Nb >.

Public Member Functions

void _M_invalidate_all () const

Public Attributes

_Safe_iterator_base * _M_const_iterators

_Safe_iterator_base * _M_iterators

unsigned int _M_version

Protected Member Functions

void _M_detach_all ()

void _M_detach_singular ()

__gnu_cxx::__mutex & _M_get_mutex ()

void _M_revalidate_singular ()

void _M_swap (_Safe_sequence_base &__x)

~_Safe_sequence_base ()

Detailed Description

The _Safe_sequence_base class provides basic support for tracking iterators into a sequence. Sequences that track iterators must derived from _Safe_sequence_base publicly, so that safe iterators (which inherit _Safe_iterator_base) can attach to them. This class contains two linked lists of iterators, one for constant iterators and one for mutable iterators, and a version number that allows very fast invalidation of all iterators that reference the container.

This class must ensure that no operation on it may throw an exception, otherwise 'safe' sequences may fail to provide the exception-safety guarantees required by the C++ standard.

Definition at line 164 of file safe_base.h.

Constructor & Destructor Documentation

__gnu_debug::_Safe_sequence_base::~_Safe_sequence_base () [inline, protected]

Notify all iterators that reference this sequence that the sequence is being destroyed.

Definition at line 184 of file safe_base.h.

References _M_detach_all().

Member Function Documentation

void __gnu_debug::_Safe_sequence_base::_M_detach_all () [protected]

Detach all iterators, leaving them singular.

Referenced by ~_Safe_sequence_base().

void __gnu_debug::_Safe_sequence_base::_M_detach_singular () [protected]

Detach all singular iterators.

Postcondition:

for all iterators i attached to this sequence, i->_M_version == _M_version.

__gnu_cxx::__mutex& __gnu_debug::_Safe_sequence_base::_M_get_mutex () [protected]

For use in _Safe_sequence.

Referenced by __gnu_debug::_Safe_sequence< _Sequence >::_M_invalidate_if(), and __gnu_debug::_Safe_sequence< _Sequence >::_M_transfer_iter().

void __gnu_debug::_Safe_sequence_base::_M_invalidate_all () const [inline]

Invalidates all iterators.

Definition at line 220 of file safe_base.h.

References _M_version.

void __gnu_debug::_Safe_sequence_base::_M_revalidate_singular () [protected]

Revalidates all attached singular iterators. This method may be used to validate iterators that were invalidated before (but for some reasion, such as an exception, need to become valid again).

void __gnu_debug::_Safe_sequence_base::_M_swap (_Safe_sequence_base & __x) [protected]

Swap this sequence with the given sequence. This operation also swaps ownership of the iterators, so that when the operation is complete all iterators that originally referenced one container now reference the other container.

Member Data Documentation

_Safe_iterator_base* __gnu_debug::_Safe_sequence_base::_M_const_iterators

The list of constant iterators that reference this container.

Definition at line 171 of file safe_base.h.

Referenced by __gnu_debug::_Safe_sequence< _Sequence >::_M_invalidate_if(), __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_invalidate_single(), and __gnu_debug::_Safe_sequence< _Sequence >::_M_transfer_iter().

_Safe_iterator_base* __gnu_debug::_Safe_sequence_base::_M_iterators

The list of mutable iterators that reference this container.

Definition at line 168 of file safe_base.h.

Referenced by __gnu_debug::_Safe_sequence< _Sequence >::_M_invalidate_if(), __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_invalidate_single(), and __gnu_debug::_Safe_sequence< _Sequence >::_M_transfer_iter().

unsigned int __gnu_debug::_Safe_sequence_base::_M_version [mutable]

The container version number. This number may never be 0.

Definition at line 174 of file safe_base.h.

Referenced by _M_invalidate_all().

Author

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