todo semaphore

include/musicat/child.h

@@ -2,8 +2,9 @@
 #define MUSICAT_CHILD_H
 
 #include <string>
-#ifdef _WIN32
 
+#ifdef WIN32
+#include <windows.h>
 #else
 #include <semaphore.h>
 #endif
@@ -31,7 +32,6 @@ void shutdown ();
 // should be called by parent process
 std::string get_sem_key (const std::string &key);
 
-#ifdef _SEMAPHORE_H
 // should be called by parent process
 sem_t *create_sem (const std::string &full_key);
 
@@ -42,7 +42,6 @@ int clear_sem (sem_t *sem, const std::string &full_key);
 
 // should be called by parent process
 int do_sem_wait (sem_t *sem, const std::string &full_key);
-#endif
 
 } // child
 } // musicat