[project @ 2002-12-05 23:49:43 by mthomas]

[ghc-hetmet.git] / ghc / rts / Capability.h

diff --git a/ghc/rts/Capability.h b/ghc/rts/Capability.h
index 6aef3db..cb0b09b 100644 (file)
--- a/ghc/rts/Capability.h
+++ b/ghc/rts/Capability.h
@@ -32,13 +32,18 @@ extern void initCapabilities(void);
 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;  
-extern nat rts_n_waiting_workers;
+#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(Capability** pCap);
-extern void yieldCapability(Capability* cap);
+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)
 {