1 /* 2 If G_HAS_CONSTRUCTORS is true then the compiler support *both* constructors and 3 destructors, in a sane way, including e.g. on library unload. If not you're on 4 your own. 5 6 Some compilers need #pragma to handle this, which does not work with macros, 7 so the way you need to use this is (for constructors): 8 9 #ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA 10 #pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(my_constructor) 11 #endif 12 G_DEFINE_CONSTRUCTOR(my_constructor) 13 static void my_constructor(void) { 14 ... 15 } 16 17 */ 18 19 #ifndef __GTK_DOC_IGNORE__ 20 21 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) 22 23 #define G_HAS_CONSTRUCTORS 1 24 25 #define G_DEFINE_CONSTRUCTOR(_func) static void __attribute__((constructor)) _func (void); 26 #define G_DEFINE_DESTRUCTOR(_func) static void __attribute__((destructor)) _func (void); 27 28 #elif defined (_MSC_VER) && (_MSC_VER >= 1500) 29 /* Visual studio 2008 and later has _Pragma */ 30 31 #define G_HAS_CONSTRUCTORS 1 32 33 /* We do some weird things to avoid the constructors being optimized 34 * away on VS2015 if WholeProgramOptimization is enabled. First we 35 * make a reference to the array from the wrapper to make sure its 36 * references. Then we use a pragma to make sure the wrapper function 37 * symbol is always included at the link stage. Also, the symbols 38 * need to be extern (but not dllexport), even though they are not 39 * really used from another object file. 40 */ 41 42 /* We need to account for differences between the mangling of symbols 43 * for Win32 (x86) and x64 programs, as symbols on Win32 are prefixed 44 * with an underscore but symbols on x64 are not. 45 */ 46 #ifdef _WIN64 47 #define G_MSVC_SYMBOL_PREFIX "" 48 #else 49 #define G_MSVC_SYMBOL_PREFIX "_" 50 #endif 51 52 #define G_DEFINE_CONSTRUCTOR(_func) G_MSVC_CTOR (_func, G_MSVC_SYMBOL_PREFIX) 53 #define G_DEFINE_DESTRUCTOR(_func) G_MSVC_DTOR (_func, G_MSVC_SYMBOL_PREFIX) 54 55 #define G_MSVC_CTOR(_func,_sym_prefix) \ 56 static void _func(void); \ 57 extern int (* _array ## _func)(void); \ 58 int _func ## _wrapper(void) { _func(); g_slist_find (NULL, _array ## _func); return 0; } \ 59 __pragma(comment(linker,"/include:" _sym_prefix # _func "_wrapper")) \ 60 __pragma(section(".CRT$XCU",read)) \ 61 __declspec(allocate(".CRT$XCU")) int (* _array ## _func)(void) = _func ## _wrapper; 62 63 #define G_MSVC_DTOR(_func,_sym_prefix) \ 64 static void _func(void); \ 65 extern int (* _array ## _func)(void); \ 66 int _func ## _constructor(void) { atexit (_func); g_slist_find (NULL, _array ## _func); return 0; } \ 67 __pragma(comment(linker,"/include:" _sym_prefix # _func "_constructor")) \ 68 __pragma(section(".CRT$XCU",read)) \ 69 __declspec(allocate(".CRT$XCU")) int (* _array ## _func)(void) = _func ## _constructor; 70 71 #elif defined (_MSC_VER) 72 73 #define G_HAS_CONSTRUCTORS 1 74 75 /* Pre Visual studio 2008 must use #pragma section */ 76 #define G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA 1 77 #define G_DEFINE_DESTRUCTOR_NEEDS_PRAGMA 1 78 79 #define G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(_func) \ 80 section(".CRT$XCU",read) 81 #define G_DEFINE_CONSTRUCTOR(_func) \ 82 static void _func(void); \ 83 static int _func ## _wrapper(void) { _func(); return 0; } \ 84 __declspec(allocate(".CRT$XCU")) static int (*p)(void) = _func ## _wrapper; 85 86 #define G_DEFINE_DESTRUCTOR_PRAGMA_ARGS(_func) \ 87 section(".CRT$XCU",read) 88 #define G_DEFINE_DESTRUCTOR(_func) \ 89 static void _func(void); \ 90 static int _func ## _constructor(void) { atexit (_func); return 0; } \ 91 __declspec(allocate(".CRT$XCU")) static int (* _array ## _func)(void) = _func ## _constructor; 92 93 #elif defined(__SUNPRO_C) 94 95 /* This is not tested, but i believe it should work, based on: 96 * http://opensource.apple.com/source/OpenSSL098/OpenSSL098-35/src/fips/fips_premain.c 97 */ 98 99 #define G_HAS_CONSTRUCTORS 1 100 101 #define G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA 1 102 #define G_DEFINE_DESTRUCTOR_NEEDS_PRAGMA 1 103 104 #define G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(_func) \ 105 init(_func) 106 #define G_DEFINE_CONSTRUCTOR(_func) \ 107 static void _func(void); 108 109 #define G_DEFINE_DESTRUCTOR_PRAGMA_ARGS(_func) \ 110 fini(_func) 111 #define G_DEFINE_DESTRUCTOR(_func) \ 112 static void _func(void); 113 114 #else 115 116 /* constructors not supported for this compiler */ 117 118 #endif 119 120 #endif /* __GTK_DOC_IGNORE__ */ 121