79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
#pragma once
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class AeLocker
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{
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bool m_fArmed = false;
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public:
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AeLocker()
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{
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}
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void arm(client *c) // if a client is passed, then the client is already locked
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{
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if (m_fArmed)
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return;
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serverAssertDebug(!GlobalLocksAcquired());
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if (c != nullptr)
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{
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serverAssert(!m_fArmed);
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serverAssert(c->lock.fOwnLock());
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if (!aeTryAcquireLock(true /*fWeak*/)) // avoid locking the client if we can
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{
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bool fOwnClientLock = true;
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int clientNesting = 1;
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for (;;)
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{
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if (fOwnClientLock)
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{
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clientNesting = c->lock.unlock_recursive();
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fOwnClientLock = false;
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}
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aeAcquireLock();
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if (!c->lock.try_lock(false)) // ensure a strong try because aeAcquireLock is expensive
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{
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aeReleaseLock();
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}
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else
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{
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break;
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}
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}
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c->lock.lock_recursive(clientNesting);
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}
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m_fArmed = true;
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}
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else if (!m_fArmed)
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{
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m_fArmed = true;
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aeAcquireLock();
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}
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}
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void disarm()
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{
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serverAssert(m_fArmed);
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m_fArmed = false;
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aeReleaseLock();
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}
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bool isArmed() const
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{
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return m_fArmed;
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}
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void release()
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{
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m_fArmed = false;
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}
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~AeLocker()
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{
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if (m_fArmed)
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aeReleaseLock();
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}
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}; |