From 7452ddfa24aa565b4a0d3408f9da1f12ad1ef3ad Mon Sep 17 00:00:00 2001
From: simonmar <unknown>
Date: Thu, 26 Feb 2004 16:31:44 +0000
Subject: [PATCH] [project @ 2004-02-26 16:31:44 by simonmar] Avoid signalling
 thread_ready_cond if rts_n_waiting_tasks==0.

---
 ghc/rts/Capability.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ghc/rts/Capability.c b/ghc/rts/Capability.c
index 18ef4df..c99cf05 100644
--- a/ghc/rts/Capability.c
+++ b/ghc/rts/Capability.c
@@ -206,7 +206,9 @@ releaseCapability( Capability* cap UNUSED_IF_NOT_SMP )
 	rts_n_free_capabilities = 1;
 #endif
 	// Signal that a capability is available
-	signalCondition(&thread_ready_cond);
+	if (rts_n_waiting_tasks > 0) {
+	    signalCondition(&thread_ready_cond);
+	}
 	startSchedulerTaskIfNecessary();
 	IF_DEBUG(scheduler, sched_belch("worker: released capability"));
     }
-- 
1.7.10.4