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Kernel: Fix thread signal handling

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Threads will now only handle signals once they are not holding any
mutexes. This removes some dead locks.
This commit is contained in:
Bananymous
2024-05-26 20:08:35 +03:00
parent a4c634e4bf
commit 2d3810874d
3 changed files with 27 additions and 11 deletions
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14
kernel/include/kernel/Lock/Mutex.h
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@@ -27,6 +27,8 @@ namespace Kernel
while (!m_locker.compare_exchange(-1, tid))
Scheduler::get().yield();
ASSERT(m_lock_depth == 0);
if (Scheduler::current_tid())
Thread::current().add_mutex();
}
m_lock_depth++;
}
@@ -41,6 +43,8 @@ namespace Kernel
if (!m_locker.compare_exchange(-1, tid))
return false;
ASSERT(m_lock_depth == 0);
if (Scheduler::current_tid())
Thread::current().add_mutex();
}
m_lock_depth++;
return true;
@@ -51,7 +55,11 @@ namespace Kernel
ASSERT(m_locker == Scheduler::current_tid());
ASSERT(m_lock_depth > 0);
if (--m_lock_depth == 0)
{
m_locker = -1;
if (Scheduler::current_tid())
Thread::current().remove_mutex();
}
}
pid_t locker() const { return m_locker; }
@@ -84,6 +92,8 @@ namespace Kernel
while (!(has_priority || m_queue_length == 0) || !m_locker.compare_exchange(-1, tid))
Scheduler::get().yield();
ASSERT(m_lock_depth == 0);
if (Scheduler::current_tid())
Thread::current().add_mutex();
}
m_lock_depth++;
}
@@ -101,6 +111,8 @@ namespace Kernel
if (has_priority)
m_queue_length++;
ASSERT(m_lock_depth == 0);
if (Scheduler::current_tid())
Thread::current().add_mutex();
}
m_lock_depth++;
return true;
@@ -117,6 +129,8 @@ namespace Kernel
if (has_priority)
m_queue_length--;
m_locker = -1;
if (Scheduler::current_tid())
Thread::current().remove_mutex();
}
}