c++ - Visual Studio macro for penter and pexit -


i'm making profiler in project, , want make easy integrate projects. i'm using penter , pexit /gh /gh compiler flags functions called every time function called or returned from. right now, have in projects copy on penter , pexit function anywhere in global scope , works, want make macro inserts function in. defined macro in profiler.h file , included in other project. errors i'm getting 

error c2598: linkage specification must @ global scope error c2601: '_pexit' : local function definitions illegal error c1075: end of file found before left brace '{' @ 'path/main.cpp' matched

note 'path/main.cpp' long path project (non-profiler project) , main i'm 'calling' macros

here macros, must understanding these wrong. figured it'd insert function 'called'

#define penter                                           \ extern "c" void __declspec(naked) _cdecl _penter(void)   \ {                                                        \   _asm push ebp;                                         \   _asm mov ebp, esp;                                     \   _asm pushad;                                           \   profiler::getinstance().enter();                       \   _asm popad;                                            \   _asm mov esp, ebp;                                     \   _asm pop ebp;                                          \   _asm ret;                                              \ }                                                        \   #define pexit                                            \ extern "c" void __declspec(naked) _cdecl _pexit(void)    \ {                                                        \   _asm push ebp;                                         \   _asm mov ebp, esp;                                     \   _asm pushad;                                           \   profiler::getinstance().exit();                        \   _asm popad;                                            \   _asm mov esp, ebp;                                     \   _asm pop ebp;                                          \   _asm ret;                                              \ }                                                        \

thanks help!

you missing } @ place before profiler.h.

i use inline function instead of multiline macro.

extern "c" inline void __declspec(naked) _cdecl _pexit(void) {
_asm pushad; profiler::getinstance().exit(); _asm popad; _asm ret; }

(that way, it's possible step function when debugging - @ least in debug mode when it's not inlined).

i removed unnecessary esp/ebp saving , restoring - pushad save registers (even esp) [and technically, need save/restore scratch registers, eax, ecx , edx, other registers must saved function(s) call.


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