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#107 nullptr crash in coro::mutex::unlock() during stress test #108

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Merged
merged 1 commit into from
Nov 6, 2021
Merged

#107 nullptr crash in coro::mutex::unlock() during stress test #108

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3 changes: 2 additions & 1 deletion src/mutex.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ auto mutex::lock_operation::await_ready() const noexcept -> bool

auto mutex::lock_operation::await_suspend(std::coroutine_handle<> awaiting_coroutine) noexcept -> bool
{
m_awaiting_coroutine = awaiting_coroutine;
void* current = m_mutex.m_state.load(std::memory_order::acquire);
void* new_value;

Expand All @@ -57,10 +58,10 @@ auto mutex::lock_operation::await_suspend(std::coroutine_handle<> awaiting_corou
if (current == unlocked_value)
{
std::atomic_thread_fence(std::memory_order::acquire);
m_awaiting_coroutine = nullptr; // nothing to await later since this doesn't suspend
return false;
}

m_awaiting_coroutine = awaiting_coroutine;
return true;
}

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