threadsafety_8h_source.html

// Copyright (c) 2009-2010 Satoshi Nakamoto

// Copyright (c) 2009-present The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.


#ifndef BITCOIN_THREADSAFETY_H

#define BITCOIN_THREADSAFETY_H


#ifdef __clang__

// TL;DR Add GUARDED_BY(mutex) to member variables. The others are

// rarely necessary. Ex: int nFoo GUARDED_BY(cs_foo);

//

// See https://clang.llvm.org/docs/ThreadSafetyAnalysis.html

// for documentation.  The clang compiler can do advanced static analysis

// of locking when given the -Wthread-safety option.

#define LOCKABLE __attribute__((capability("")))

#define SCOPED_LOCKABLE __attribute__((scoped_lockable))

#define GUARDED_BY(x) __attribute__((guarded_by(x)))

#define PT_GUARDED_BY(x) __attribute__((pt_guarded_by(x)))

#define ACQUIRED_AFTER(...) __attribute__((acquired_after(__VA_ARGS__)))

#define ACQUIRED_BEFORE(...) __attribute__((acquired_before(__VA_ARGS__)))

#define EXCLUSIVE_LOCK_FUNCTION(...) __attribute__((acquire_capability(__VA_ARGS__)))

#define SHARED_LOCK_FUNCTION(...) __attribute__((acquire_shared_capability(__VA_ARGS__)))

#define EXCLUSIVE_TRYLOCK_FUNCTION(...) __attribute__((try_acquire_capability(__VA_ARGS__)))

#define SHARED_TRYLOCK_FUNCTION(...) __attribute__((try_acquire_shared_capability(__VA_ARGS__)))

#define UNLOCK_FUNCTION(...) __attribute__((release_capability(__VA_ARGS__)))

#define SHARED_UNLOCK_FUNCTION(...) __attribute__((release_shared_capability(__VA_ARGS__)))

#define LOCK_RETURNED(x) __attribute__((lock_returned(x)))

#define LOCKS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))

#define EXCLUSIVE_LOCKS_REQUIRED(...) __attribute__((requires_capability(__VA_ARGS__)))

#define SHARED_LOCKS_REQUIRED(...) __attribute__((requires_shared_capability(__VA_ARGS__)))

#define NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))

#define ASSERT_EXCLUSIVE_LOCK(...) __attribute__((assert_capability(__VA_ARGS__)))

#else

#define LOCKABLE

#define SCOPED_LOCKABLE

#define GUARDED_BY(x)

#define PT_GUARDED_BY(x)

#define ACQUIRED_AFTER(...)

#define ACQUIRED_BEFORE(...)

#define EXCLUSIVE_LOCK_FUNCTION(...)

#define SHARED_LOCK_FUNCTION(...)

#define EXCLUSIVE_TRYLOCK_FUNCTION(...)

#define SHARED_TRYLOCK_FUNCTION(...)

#define UNLOCK_FUNCTION(...)

#define SHARED_UNLOCK_FUNCTION(...)

#define LOCK_RETURNED(x)

#define LOCKS_EXCLUDED(...)

#define EXCLUSIVE_LOCKS_REQUIRED(...)

#define SHARED_LOCKS_REQUIRED(...)

#define NO_THREAD_SAFETY_ANALYSIS

#define ASSERT_EXCLUSIVE_LOCK(...)

#endif // __GNUC__


#endif // BITCOIN_THREADSAFETY_H