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merge #19249: Add means to handle negative capabilities in thread safety annotations

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This commit is contained in:
Kittywhiskers Van Gogh 2020-06-09 16:50:45 +03:00
parent 51fababb9c
commit cbc6186b64
2 changed files with 13 additions and 0 deletions
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6
src/sync.h
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@ -100,6 +100,12 @@ public:
}
using UniqueLock = std::unique_lock<PARENT>;
#ifdef __clang__
//! For negative capabilities in the Clang Thread Safety Analysis.
//! A negative requirement uses the EXCLUSIVE_LOCKS_REQUIRED attribute, in conjunction
//! with the ! operator, to indicate that a mutex should not be held.
const AnnotatedMixin& operator!() const { return *this; }
#endif // __clang__
};
/**

7
src/threadsafety.h
View File

@ -60,6 +60,13 @@
// and should only be used when sync.h Mutex/LOCK/etc are not usable.
class LOCKABLE StdMutex : public std::mutex
{
public:
#ifdef __clang__
//! For negative capabilities in the Clang Thread Safety Analysis.
//! A negative requirement uses the EXCLUSIVE_LOCKS_REQUIRED attribute, in conjunction
//! with the ! operator, to indicate that a mutex should not be held.
const StdMutex& operator!() const { return *this; }
#endif // __clang__
};
// StdLockGuard provides an annotated version of std::lock_guard for us,