TomZ
70 lines
3.0 KiB
C
70 lines
3.0 KiB
C
/*
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* This file is part of the Flowee project
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* Copyright (C) 2009-2010 Satoshi Nakamoto
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* Copyright (C) 2009-2012 The Bitcoin Core developers
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FLOWEE_THREADSAFETY_H
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#define FLOWEE_THREADSAFETY_H
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#ifdef __clang__
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// TL;DR Add GUARDED_BY(mutex) to member variables. The others are
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// rarely necessary. Ex: int nFoo GUARDED_BY(cs_foo);
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//
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// See http://clang.llvm.org/docs/LanguageExtensions.html#threadsafety
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// for documentation. The clang compiler can do advanced static analysis
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// of locking when given the -Wthread-safety option.
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#define LOCKABLE __attribute__((lockable))
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#define SCOPED_LOCKABLE __attribute__((scoped_lockable))
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#define GUARDED_BY(x) __attribute__((guarded_by(x)))
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#define GUARDED_VAR __attribute__((guarded_var))
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#define PT_GUARDED_BY(x) __attribute__((pt_guarded_by(x)))
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#define PT_GUARDED_VAR __attribute__((pt_guarded_var))
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#define ACQUIRED_AFTER(...) __attribute__((acquired_after(__VA_ARGS__)))
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#define ACQUIRED_BEFORE(...) __attribute__((acquired_before(__VA_ARGS__)))
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#define EXCLUSIVE_LOCK_FUNCTION(...) __attribute__((exclusive_lock_function(__VA_ARGS__)))
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#define SHARED_LOCK_FUNCTION(...) __attribute__((shared_lock_function(__VA_ARGS__)))
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#define EXCLUSIVE_TRYLOCK_FUNCTION(...) __attribute__((exclusive_trylock_function(__VA_ARGS__)))
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#define SHARED_TRYLOCK_FUNCTION(...) __attribute__((shared_trylock_function(__VA_ARGS__)))
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#define UNLOCK_FUNCTION(...) __attribute__((unlock_function(__VA_ARGS__)))
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#define LOCK_RETURNED(x) __attribute__((lock_returned(x)))
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#define LOCKS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))
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#define EXCLUSIVE_LOCKS_REQUIRED(...) __attribute__((exclusive_locks_required(__VA_ARGS__)))
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#define SHARED_LOCKS_REQUIRED(...) __attribute__((shared_locks_required(__VA_ARGS__)))
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#define NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
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#else
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#define LOCKABLE
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#define SCOPED_LOCKABLE
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#define GUARDED_BY(x)
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#define GUARDED_VAR
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#define PT_GUARDED_BY(x)
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#define PT_GUARDED_VAR
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#define ACQUIRED_AFTER(...)
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#define ACQUIRED_BEFORE(...)
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#define EXCLUSIVE_LOCK_FUNCTION(...)
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#define SHARED_LOCK_FUNCTION(...)
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#define EXCLUSIVE_TRYLOCK_FUNCTION(...)
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#define SHARED_TRYLOCK_FUNCTION(...)
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#define UNLOCK_FUNCTION(...)
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#define LOCK_RETURNED(x)
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#define LOCKS_EXCLUDED(...)
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#define EXCLUSIVE_LOCKS_REQUIRED(...)
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#define SHARED_LOCKS_REQUIRED(...)
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#define NO_THREAD_SAFETY_ANALYSIS
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#endif // __GNUC__
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#endif
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