Implemented Sem_Value for debug; get the current value of a semaphore.

skyjake · Aug 29, 2011 · 18c086b · 18c086b
1 parent 51dcebb
commit 18c086b
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Showing 2 changed files with 19 additions and 11 deletions.
diff --git a/doomsday/engine/portable/include/sys_system.h b/doomsday/engine/portable/include/sys_system.h
@@ -64,7 +64,17 @@ void Sys_Unlock(mutex_t mutexHandle);
 
 sem_t Sem_Create(uint32_t initialValue);
 void Sem_Destroy(sem_t semaphore);
+
+/**
+ * "Proberen" a semaphore. Blocks until the successful.
+ */
 void Sem_P(sem_t semaphore);
+
+/**
+ * "Verhogen" a semaphore. Returns immediately.
+ */
 void Sem_V(sem_t semaphore);
 
+uint32_t Sem_Value(sem_t semaphore);
+
 #endif /* LIBDENG_FILESYS_SYSTEM_H */
diff --git a/doomsday/engine/portable/src/sys_system.c b/doomsday/engine/portable/src/sys_system.c
@@ -375,11 +375,6 @@ void Sys_Unlock(mutex_t handle)
     SDL_mutexV((SDL_mutex *) handle);
 }
 
-/**
- * Create a new semaphore.
- *
- * @return              New handle.
- */
 sem_t Sem_Create(uint32_t initialValue)
 {
     return (sem_t) SDL_CreateSemaphore(initialValue);
@@ -393,9 +388,6 @@ void Sem_Destroy(sem_t semaphore)
     }
 }
 
-/**
- * "Proberen" a semaphore. Blocks until the successful.
- */
 void Sem_P(sem_t semaphore)
 {
     if(semaphore)
@@ -404,13 +396,19 @@ void Sem_P(sem_t semaphore)
     }
 }
 
-/**
- * "Verhogen" a semaphore. Returns immediately.
- */
 void Sem_V(sem_t semaphore)
 {
     if(semaphore)
     {
         SDL_SemPost((SDL_sem *) semaphore);
     }
 }
+
+uint32_t Sem_Value(sem_t semaphore)
+{
+    if(semaphore)
+    {
+        return (uint32_t)SDL_SemValue((SDL_sem*)semaphore);
+    }
+    return 0;
+}