Thread: Semaphore pre-initialisation

Let's say I have this:

Code:

#ifdef _WIN32
typedef HANDLE sem;
#define INVALID SEM NULL
...
#else
typedef sem_t sem;
#define INVALID_SEM ...
...
#endif
sem global_sem = INVALID_SEM;
int main(...) { ... }

Is there any way to define INVALID_SEM in the second case? I've been trying to find info on that but all the search engines think I'm looking for is sem_init which is intended to be used during runtime, not compile time.