P99_AT_LOAD_DEFINE P99_AT_UNLOAD_DEFINE P99_INIT_FUNCTION_DECLARE p99_init_main P99_INIT_TRIGGER P99_INIT_VARIABLE P99_INTERCEPT_MAIN P99_MAIN_INTERCEPT

P99_INIT_FUNCTION_DECLARE #define P99_INIT_FUNCTION_DECLARE (   FUNC,   NR  ) Request that FUNC is to be called at initialization time with priority NR. Parameters FUNC must be compatible to a function pointer of type void (*)(void) NR must be chosen uniquely in the range 0 .. P99_MAX_NUMBER. It can be omitted, in which case a low valued number is provided. Warning To ensure that NR is unique the file "p99_init.h" must be included before any usage of P99_INIT_FUNCTION_DECLARE The mechanism that ensures this feature is relatively fragile. You should in particular ensure that the compilation unit that contains p99_init_main (or main if you intercept main) see all such calls to P99_INIT_FUNCTION_DECLARE that are used by the program. This works by initializing a bunch of static const variables with function and data pointers. The order in which these then are processed depends on the file inclusion order. So if you do not use the NR you should not rely on a particular order. If you need initialization dependencies between "modules" (= compilation units) you should use // ***** file module1.h P99_DECLARE_ONCE_CHAIN(module1); // always include this immediately before, even several times #include "p99_init.h" P99_INIT_FUNCTION_DECLARE(module1_trigger); // ***** file module2.c P99_DEFINE_ONCE_CHAIN(module1) { // here initialize some global variables e.g } // always include this immediately before, even several times #include "p99_init.h" void module1_trigger(void) { P99_INIT_CHAIN(module1); } // ***** file module2.h P99_DECLARE_ONCE_CHAIN(module2); // always include this immediately before, even several times #include "p99_init.h" P99_INIT_FUNCTION_DECLARE(module2_trigger); // ***** file module2.c // module2 depends upon module1 being properly initialized P99_DEFINE_ONCE_CHAIN(module2, module1) { // here initialize some global variables e.g } // always include this immediately before, even several times #include "p99_init.h" void module2_trigger(void) { P99_INIT_CHAIN(module2); } See also P99_INIT_VARIABLE for a similar mechanism with that receive a pointer argument and are compatible with void (*)(void*). Definition at line 143 of file p99_init.h.