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Kernel: Fix a few Thread::block related races

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We need to have a Thread lock to protect threading related
operations, such as Thread::m_blocker which is used in
Thread::block.

Also, if a Thread::Blocker indicates that it should be
unblocking immediately, don't actually block the Thread
and instead return immediately in Thread::block.
This commit is contained in:
Tom
2020-08-02 16:59:01 -06:00
committed by Andreas Kling
parent df3c8267d4
commit c813bb7355
Notes: sideshowbarker 2024-07-19 04:21:30 +09:00 
Author: https://github.com/tomuta
Commit: https://github.com/SerenityOS/serenity/commit/c813bb7355d
Pull-request: https://github.com/SerenityOS/serenity/pull/2973
Reviewed-by: https://github.com/awesomekling
7 changed files with 109 additions and 46 deletions
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2
Kernel/FileSystem/Plan9FileSystem.cpp
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@@ -498,7 +498,7 @@ KResult Plan9FS::read_and_dispatch_one_message()
return KSuccess;
}
bool Plan9FS::Blocker::should_unblock(Thread&, time_t, long)
bool Plan9FS::Blocker::should_unblock(Thread&)
{
if (m_completion.completed)
return true;