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Prioritize vip_lock in shared_mutex

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Should fix some deadlock issues.
This commit is contained in:
Nekotekina 2019-10-06 13:32:03 +03:00
parent 239f53568c
commit cf13dee1f3
1 changed files with 2 additions and 2 deletions
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4
Utilities/mutex.h
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@ -122,14 +122,14 @@ public:
const u32 value = m_value.load();
// Conditional increment
return value < c_one - 1 && (value % c_vip) == 0 && m_value.compare_and_swap_test(value, value + c_vip);
return (value < c_one - 1 || value & (c_one - c_vip)) && (value % c_vip) == 0 && m_value.compare_and_swap_test(value, value + c_vip);
}
void lock_vip()
{
const u32 value = m_value.load();
if (UNLIKELY(value >= c_one - 1 || (value % c_vip) || !m_value.compare_and_swap_test(value, value + c_vip)))
if (UNLIKELY((value >= c_one - 1 && !(value & (c_one - c_vip))) || (value % c_vip) || !m_value.compare_and_swap_test(value, value + c_vip)))
{
imp_lock_vip(value);
}