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sync: simplify MaybeCheckNotHeld() definitions by using a template

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Reduce 4 of the `MaybeCheckNotHeld()` definitions to 2 by using a
template. This also makes the function usable for other
[BasicLockable](https://en.cppreference.com/w/cpp/named_req/BasicLockable)
types.
This commit is contained in:
Vasil Dimov 2022-07-13 10:13:31 +02:00
parent a8c3590890
commit 11c190e3f1
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1 changed files with 6 additions and 8 deletions
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14
src/sync.h
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@ -249,14 +249,12 @@ using DebugLock = UniqueLock<typename std::remove_reference<typename std::remove
inline Mutex& MaybeCheckNotHeld(Mutex& cs) EXCLUSIVE_LOCKS_REQUIRED(!cs) LOCK_RETURNED(cs) { return cs; }
inline Mutex* MaybeCheckNotHeld(Mutex* cs) EXCLUSIVE_LOCKS_REQUIRED(!cs) LOCK_RETURNED(cs) { return cs; }
// When locking a GlobalMutex, just check it is not locked in the surrounding scope
inline GlobalMutex& MaybeCheckNotHeld(GlobalMutex& cs) LOCKS_EXCLUDED(cs) LOCK_RETURNED(cs) { return cs; }
inline GlobalMutex* MaybeCheckNotHeld(GlobalMutex* cs) LOCKS_EXCLUDED(cs) LOCK_RETURNED(cs) { return cs; }
// When locking a RecursiveMutex, it's okay to already hold the lock
// but check that it is not known to be locked in the surrounding scope anyway
inline RecursiveMutex& MaybeCheckNotHeld(RecursiveMutex& cs) LOCKS_EXCLUDED(cs) LOCK_RETURNED(cs) { return cs; }
inline RecursiveMutex* MaybeCheckNotHeld(RecursiveMutex* cs) LOCKS_EXCLUDED(cs) LOCK_RETURNED(cs) { return cs; }
// When locking a GlobalMutex or RecursiveMutex, just check it is not
// locked in the surrounding scope.
template <typename MutexType>
inline MutexType& MaybeCheckNotHeld(MutexType& m) LOCKS_EXCLUDED(m) LOCK_RETURNED(m) { return m; }
template <typename MutexType>
inline MutexType* MaybeCheckNotHeld(MutexType* m) LOCKS_EXCLUDED(m) LOCK_RETURNED(m) { return m; }
#define LOCK(cs) DebugLock<decltype(cs)> UNIQUE_NAME(criticalblock)(MaybeCheckNotHeld(cs), #cs, __FILE__, __LINE__)
#define LOCK2(cs1, cs2) \