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Kernel: Keep a list of threads per Process

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This allow us to iterate only the threads of the process.
This commit is contained in:
Tom 2021-01-22 23:24:33 -07:00 • committed by Andreas Kling
parent 03a9ee79fa
commit ac3927086f
4 changed files with 45 additions and 28 deletions
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8
Kernel/Thread.cpp
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@ -49,7 +49,7 @@ Thread::Thread(NonnullRefPtr<Process> process)
: m_process(move(process))
, m_name(m_process->name())
{
bool is_first_thread = m_process->m_thread_count.fetch_add(1, AK::MemoryOrder::memory_order_relaxed) == 0;
bool is_first_thread = m_process->add_thread(*this);
ArmedScopeGuard guard([&]() {
drop_thread_count(is_first_thread);
});
@ -130,6 +130,7 @@ Thread::~Thread()
// block conditions would access m_process, which would be in
// the middle of being destroyed.
ScopedSpinLock lock(g_scheduler_lock);
ASSERT(!m_process_thread_list_node.is_in_list());
g_scheduler_data->thread_list_for_state(m_state).remove(*this);
// We shouldn't be queued
@ -388,10 +389,9 @@ void Thread::finalize()
void Thread::drop_thread_count(bool initializing_first_thread)
{
auto thread_cnt_before = m_process->m_thread_count.fetch_sub(1, AK::MemoryOrder::memory_order_acq_rel);
bool is_last = process().remove_thread(*this);
ASSERT(thread_cnt_before != 0);
if (!initializing_first_thread && thread_cnt_before == 1)
if (!initializing_first_thread && is_last)
process().finalize();
}