File indexing completed on 2024-04-28 11:47:33
0001 /* 0002 SPDX-FileCopyrightText: 2011 Will Stephenson <wstephenson@kde.org> 0003 0004 SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL 0005 */ 0006 0007 #ifndef MM_MACROS_H 0008 #define MM_MACROS_H 0009 0010 #define MM_GLOBAL_STATIC_STRUCT_NAME(NAME) 0011 typedef void (*MmCleanUpFunction)(); 0012 class MmCleanUpGlobalStatic 0013 { 0014 public: 0015 MmCleanUpFunction func; 0016 0017 inline ~MmCleanUpGlobalStatic() 0018 { 0019 func(); 0020 } 0021 }; 0022 0023 #define MM_GLOBAL_STATIC(TYPE, NAME) MM_GLOBAL_STATIC_WITH_ARGS(TYPE, NAME, ()) 0024 0025 /* clang-format off */ 0026 #define MM_GLOBAL_STATIC_WITH_ARGS(TYPE, NAME, ARGS) \ 0027 static QBasicAtomicPointer<TYPE > _mm_static_##NAME = Q_BASIC_ATOMIC_INITIALIZER(0); \ 0028 static bool _mm_static_##NAME##_destroyed; \ 0029 static struct MM_GLOBAL_STATIC_STRUCT_NAME(NAME) \ 0030 { \ 0031 inline bool isDestroyed() const \ 0032 { \ 0033 return _mm_static_##NAME##_destroyed; \ 0034 } \ 0035 inline bool exists() const \ 0036 { \ 0037 return _mm_static_##NAME != 0; \ 0038 } \ 0039 inline operator TYPE*() \ 0040 { \ 0041 return operator->(); \ 0042 } \ 0043 inline TYPE *operator->() \ 0044 { \ 0045 if (!_mm_static_##NAME) { \ 0046 if (isDestroyed()) { \ 0047 qFatal("Fatal Error: Accessed global static '%s *%s()' after destruction. " \ 0048 "Defined at %s:%d", #TYPE, #NAME, __FILE__, __LINE__); \ 0049 } \ 0050 TYPE *x = new TYPE ARGS; \ 0051 if (!_mm_static_##NAME.testAndSetOrdered(0, x) \ 0052 && _mm_static_##NAME != x ) { \ 0053 delete x; \ 0054 } else { \ 0055 static MmCleanUpGlobalStatic cleanUpObject = { destroy }; \ 0056 } \ 0057 } \ 0058 return _mm_static_##NAME; \ 0059 } \ 0060 inline TYPE &operator*() \ 0061 { \ 0062 return *operator->(); \ 0063 } \ 0064 static void destroy() \ 0065 { \ 0066 _mm_static_##NAME##_destroyed = true; \ 0067 TYPE *x = _mm_static_##NAME; \ 0068 _mm_static_##NAME = 0; \ 0069 delete x; \ 0070 } \ 0071 } NAME; 0072 /* clang-format on */ 0073 0074 #endif