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/* Thread iterators and ranges for GDB, the GNU debugger.
Copyright (C) 2018-2019 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/>. */
#include "defs.h"
#include "gdbthread.h"
#include "inferior.h"
/* See thread-iter.h. */
all_threads_iterator::all_threads_iterator (begin_t)
{
/* Advance M_INF/M_THR to the first thread's position. */
for (m_inf = inferior_list; m_inf != NULL; m_inf = m_inf->next)
if ((m_thr = m_inf->thread_list) != NULL)
return;
}
/* See thread-iter.h. */
void
all_threads_iterator::advance ()
{
/* 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;
for (; m_inf != NULL; m_inf = m_inf->next)
{
m_thr = m_inf->thread_list;
while (m_thr != NULL)
{
return;
start:
m_thr = m_thr->next;
}
}
}
/* See thread-iter.h. */
bool
all_matching_threads_iterator::m_inf_matches ()
{
return (m_filter_ptid == minus_one_ptid
|| m_filter_ptid.pid () == m_inf->pid);
}
/* See thread-iter.h. */
all_matching_threads_iterator::all_matching_threads_iterator
(ptid_t filter_ptid)
: m_filter_ptid (filter_ptid)
{
m_thr = nullptr;
for (m_inf = inferior_list; m_inf != NULL; m_inf = m_inf->next)
if (m_inf_matches ())
for (m_thr = m_inf->thread_list; m_thr != NULL; m_thr = m_thr->next)
if (m_thr->ptid.matches (m_filter_ptid))
return;
}
/* See thread-iter.h. */
void
all_matching_threads_iterator::advance ()
{
/* 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;
for (; m_inf != NULL; m_inf = m_inf->next)
if (m_inf_matches ())
{
m_thr = m_inf->thread_list;
while (m_thr != NULL)
{
if (m_thr->ptid.matches (m_filter_ptid))
return;
start:
m_thr = m_thr->next;
}
}
}
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