51 unsigned int sleep(
unsigned int s)
    64 int setenv(
const char *name, 
const char *value, 
int overwrite)
    69     if (GetEnvironmentVariable(name, &c, 
sizeof (c)) > 0) 
return 0;
    72   if (SetEnvironmentVariable(name, value) != 0) 
return 0;
 int usleep(unsigned int us)
int win32_nanosleep(long long nano)
unsigned int sleep(unsigned int s)
int setenv(const char *name, const char *value, int overwrite)