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- /* Inferior iterators and ranges for GDB, the GNU debugger.
- Copyright (C) 2018-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #ifndef INFERIOR_ITER_H
- #define INFERIOR_ITER_H
- #include "gdbsupport/filtered-iterator.h"
- #include "gdbsupport/safe-iterator.h"
- /* A forward iterator that iterates over all inferiors. */
- class all_inferiors_iterator
- {
- public:
- typedef all_inferiors_iterator self_type;
- typedef struct inferior *value_type;
- typedef struct inferior *&reference;
- typedef struct inferior **pointer;
- typedef std::forward_iterator_tag iterator_category;
- typedef int difference_type;
- /* Create an iterator pointing at HEAD. */
- all_inferiors_iterator (process_stratum_target *proc_target,
- const intrusive_list<inferior> &list)
- : m_proc_target (proc_target), m_inf_iter (list.begin ())
- {
- intrusive_list<inferior>::iterator end;
- /* Advance M_INF to the first inferior's position. */
- for (; m_inf_iter != end; ++m_inf_iter)
- if (m_inf_matches ())
- return;
- }
- /* Create a one-past-end iterator. */
- all_inferiors_iterator ()
- : m_proc_target (nullptr)
- {}
- all_inferiors_iterator &operator++ ()
- {
- advance ();
- return *this;
- }
- inferior *operator* () const
- { return &*m_inf_iter; }
- bool operator!= (const all_inferiors_iterator &other) const
- { return m_inf_iter != other.m_inf_iter; }
- private:
- /* Advance to next inferior, skipping filtered inferiors. */
- void advance ()
- {
- intrusive_list<inferior>::iterator end;
- /* The loop below is written in the natural way as-if we'd always
- start at the beginning of the inferior list. This
- fast-forwards the algorithm to the actual current position. */
- goto start;
- while (m_inf_iter != end)
- {
- if (m_inf_matches ())
- return;
- start:
- ++m_inf_iter;
- }
- }
- bool m_inf_matches ()
- {
- return (m_proc_target == nullptr
- || m_proc_target == m_inf_iter->process_target ());
- }
- process_stratum_target *m_proc_target;
- intrusive_list<inferior>::iterator m_inf_iter;
- };
- /* A range adapter that makes it possible to iterate over all
- inferiors with range-for. */
- using all_inferiors_range = iterator_range<all_inferiors_iterator>;
- /* Filter for filtered_iterator. Filters out exited inferiors. */
- struct exited_inferior_filter
- {
- bool operator() (inferior *inf)
- {
- return inf->pid != 0;
- }
- };
- /* Iterate over all non-exited inferiors. */
- using all_non_exited_inferiors_iterator
- = filtered_iterator<all_inferiors_iterator, exited_inferior_filter>;
- /* A range adapter that makes it possible to iterate over all
- non-exited inferiors with range-for. */
- using all_non_exited_inferiors_range
- = iterator_range<all_non_exited_inferiors_iterator>;
- /* Iterate over all inferiors, safely. */
- using all_inferiors_safe_iterator
- = basic_safe_iterator<all_inferiors_iterator>;
- /* A range adapter that makes it possible to iterate over all
- inferiors with range-for "safely". I.e., it is safe to delete the
- currently-iterated inferior. */
- using all_inferiors_safe_range = iterator_range<all_inferiors_safe_iterator>;
- #endif /* !defined (INFERIOR_ITER_H) */
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