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sync.h: Add GlobalMutex type

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Anthony Towns 2022-04-20 17:09:20 +10:00
parent be6aa72f9f
commit a559509a0b
1 changed files with 12 additions and 0 deletions
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src/sync.h
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@ -129,10 +129,22 @@ using RecursiveMutex = AnnotatedMixin<std::recursive_mutex>;
/** Wrapped mutex: supports waiting but not recursive locking */
using Mutex = AnnotatedMixin<std::mutex>;
/** Different type to mark Mutex at global scope
*
* Thread safety analysis can't handle negative assertions about mutexes
* with global scope well, so mark them with a separate type, and
* eventually move all the mutexes into classes so they are not globally
* visible.
*
* See: https://github.com/bitcoin/bitcoin/pull/20272#issuecomment-720755781
*/
class GlobalMutex : public Mutex { };
#define AssertLockHeld(cs) AssertLockHeldInternal(#cs, __FILE__, __LINE__, &cs)
inline void AssertLockNotHeldInline(const char* name, const char* file, int line, Mutex* cs) EXCLUSIVE_LOCKS_REQUIRED(!cs) { AssertLockNotHeldInternal(name, file, line, cs); }
inline void AssertLockNotHeldInline(const char* name, const char* file, int line, RecursiveMutex* cs) LOCKS_EXCLUDED(cs) { AssertLockNotHeldInternal(name, file, line, cs); }
inline void AssertLockNotHeldInline(const char* name, const char* file, int line, GlobalMutex* cs) LOCKS_EXCLUDED(cs) { AssertLockNotHeldInternal(name, file, line, cs); }
#define AssertLockNotHeld(cs) AssertLockNotHeldInline(#cs, __FILE__, __LINE__, &cs)
/** Wrapper around std::unique_lock style lock for Mutex. */