mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 02:08:12 +03:00
688e54eac7
This does not add any behaviour change to the processes, but it ties a TTY to an active process group via TIOCSPGRP, and returns the TTY to the kernel when all processes in the process group die. Also makes the TTY keep a link to the original controlling process' parent (for SIGCHLD) instead of the process itself.
71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2020, the SerenityOS developers.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "ProcessGroup.h"
|
|
|
|
namespace Kernel {
|
|
|
|
RecursiveSpinLock g_process_groups_lock;
|
|
InlineLinkedList<ProcessGroup>* g_process_groups;
|
|
|
|
ProcessGroup::~ProcessGroup()
|
|
{
|
|
ScopedSpinLock lock(g_process_groups_lock);
|
|
g_process_groups->remove(this);
|
|
}
|
|
|
|
NonnullRefPtr<ProcessGroup> ProcessGroup::create(ProcessGroupID pgid)
|
|
{
|
|
auto process_group = adopt(*new ProcessGroup(pgid));
|
|
{
|
|
ScopedSpinLock lock(g_process_groups_lock);
|
|
g_process_groups->prepend(process_group);
|
|
}
|
|
|
|
return process_group;
|
|
}
|
|
|
|
NonnullRefPtr<ProcessGroup> ProcessGroup::find_or_create(ProcessGroupID pgid)
|
|
{
|
|
if (auto existing = from_pgid(pgid))
|
|
return *existing;
|
|
|
|
return create(pgid);
|
|
}
|
|
|
|
ProcessGroup* ProcessGroup::from_pgid(ProcessGroupID pgid)
|
|
{
|
|
ScopedSpinLock lock(g_process_groups_lock);
|
|
|
|
for (auto& group : *g_process_groups) {
|
|
if (group.pgid() == pgid)
|
|
return &group;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
}
|