ThreadSafetyAnalysis.h

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#pragma once
 
// see https://clang.llvm.org/docs/ThreadSafetyAnalysis.html#mutexheader
 
#ifndef THREAD_SAFETY_ANALYSIS_MUTEX_H
#define THREAD_SAFETY_ANALYSIS_MUTEX_H
 
#pragma GCC system_header
 
// Enable thread safety attributes only with clang.
// The attributes can be safely erased when compiling with other compilers.
#if defined(__clang__) && (!defined(SWIG))
#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
#else
#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
#endif
 
#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
 
#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
 
#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
 
#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
 
#define ACQUIRED_BEFORE(...)                                                   \
  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
 
#define ACQUIRED_AFTER(...)                                                    \
  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
 
#define REQUIRES(...)                                                          \
  THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
 
#define REQUIRES_SHARED(...)                                                   \
  THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
 
#define ACQUIRE(...)                                                           \
  THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
 
#define ACQUIRE_SHARED(...)                                                    \
  THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
 
#define RELEASE(...)                                                           \
  THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
 
#define RELEASE_SHARED(...)                                                    \
  THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
 
#define TRY_ACQUIRE(...)                                                       \
  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
 
#define TRY_ACQUIRE_SHARED(...)                                                \
  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
 
#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
 
#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
 
#define ASSERT_SHARED_CAPABILITY(x)                                            \
  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
 
#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
 
#define NO_THREAD_SAFETY_ANALYSIS                                              \
  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
 
#ifdef USE_LOCK_STYLE_THREAD_SAFETY_ATTRIBUTES
// The original version of thread safety analysis the following attribute
// definitions.  These use a lock-based terminology.  They are still in use
// by existing thread safety code, and will continue to be supported.
 
// Deprecated.
#define PT_GUARDED_VAR THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_var)
 
// Deprecated.
#define GUARDED_VAR THREAD_ANNOTATION_ATTRIBUTE__(guarded_var)
 
// Replaced by REQUIRES
#define EXCLUSIVE_LOCKS_REQUIRED(...)                                          \
  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_locks_required(__VA_ARGS__))
 
// Replaced by REQUIRES_SHARED
#define SHARED_LOCKS_REQUIRED(...)                                             \
  THREAD_ANNOTATION_ATTRIBUTE__(shared_locks_required(__VA_ARGS__))
 
// Replaced by CAPABILITY
#define LOCKABLE THREAD_ANNOTATION_ATTRIBUTE__(lockable)
 
// Replaced by SCOPED_CAPABILITY
#define SCOPED_LOCKABLE THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
 
// Replaced by ACQUIRE
#define EXCLUSIVE_LOCK_FUNCTION(...)                                           \
  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock_function(__VA_ARGS__))
 
// Replaced by ACQUIRE_SHARED
#define SHARED_LOCK_FUNCTION(...)                                              \
  THREAD_ANNOTATION_ATTRIBUTE__(shared_lock_function(__VA_ARGS__))
 
// Replaced by RELEASE and RELEASE_SHARED
#define UNLOCK_FUNCTION(...)                                                   \
  THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__))
 
// Replaced by TRY_ACQUIRE
#define EXCLUSIVE_TRYLOCK_FUNCTION(...)                                        \
  THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock_function(__VA_ARGS__))
 
// Replaced by TRY_ACQUIRE_SHARED
#define SHARED_TRYLOCK_FUNCTION(...)                                           \
  THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock_function(__VA_ARGS__))
 
// Replaced by ASSERT_CAPABILITY
#define ASSERT_EXCLUSIVE_LOCK(...)                                             \
  THREAD_ANNOTATION_ATTRIBUTE__(assert_exclusive_lock(__VA_ARGS__))
 
// Replaced by ASSERT_SHARED_CAPABILITY
#define ASSERT_SHARED_LOCK(...)                                                \
  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_lock(__VA_ARGS__))
 
// Replaced by EXCLUDE_CAPABILITY.
#define LOCKS_EXCLUDED(...)                                                    \
  THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
 
// Replaced by RETURN_CAPABILITY
#define LOCK_RETURNED(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
 
#endif // USE_LOCK_STYLE_THREAD_SAFETY_ATTRIBUTES
 
#endif // THREAD_SAFETY_ANALYSIS_MUTEX_H