X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FCapability.h;h=cb0b09bd7cfca4db924c51cf122ef0e941433e8e;hb=0bffc410964e1688ad80d277d53400659e697ab5;hp=b878507a228c96c7236c7ad87b8feb3d9b9d3482;hpb=e289780ec23a1934f39d214d60705f8f26d1763d;p=ghc-hetmet.git

diff --git a/ghc/rts/Capability.h b/ghc/rts/Capability.h
index b878507..cb0b09b 100644
--- a/ghc/rts/Capability.h
+++ b/ghc/rts/Capability.h
@@ -28,14 +28,22 @@
 extern Capability MainCapability;
 #endif
 
-
 extern void initCapabilities(void);
-extern void grabCapability(Capability** cap);
+extern void grabCapability(Capability** pCap);
 extern void releaseCapability(Capability* cap);
 
-#if defined(RTS_SUPPORTS_THREADS)
-/* total number of available capabilities */
 extern nat rts_n_free_capabilities;  
+#if defined(RTS_SUPPORTS_THREADS)
+/* number of worker threads waiting to do good work within
+   the RTS. Used by Task.c (only) to determine whether or not
+   new worker threads needs to be created (when an external call
+   is made).
+ */
+extern nat rts_n_waiting_workers; /* used by Task.c to determine */
+
+extern void grabReturnCapability(Mutex* pMutex, Capability** pCap);
+extern void yieldToReturningWorker(Mutex* pMutex, Capability** pCap);
+extern void waitForWorkCapability(Mutex* pMutex, Capability** pCap, rtsBool runnable);
 
 static inline nat getFreeCapabilities (void)
 {