From a99d0dd7b7a920540401d591a54a5776afb5ec48 Mon Sep 17 00:00:00 2001
From: Rene Gollent <anevilyak@gmail.com>
Date: Fri, 10 Jun 2011 01:55:12 +0000
Subject: [PATCH] AcquireReference() now returns the previous ref count.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42079 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 headers/private/shared/Referenceable.h | 2 +-
 src/kits/support/Referenceable.cpp     | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/headers/private/shared/Referenceable.h b/headers/private/shared/Referenceable.h
index 264eaea6ea..f020d7e163 100644
--- a/headers/private/shared/Referenceable.h
+++ b/headers/private/shared/Referenceable.h
@@ -17,7 +17,7 @@ public:
 								BReferenceable();
 	virtual						~BReferenceable();
 
-			void				AcquireReference();
+			int32				AcquireReference();
 			bool				ReleaseReference();
 									// returns true after last
 
diff --git a/src/kits/support/Referenceable.cpp b/src/kits/support/Referenceable.cpp
index 3df724635e..39906255ae 100644
--- a/src/kits/support/Referenceable.cpp
+++ b/src/kits/support/Referenceable.cpp
@@ -28,13 +28,16 @@ BReferenceable::~BReferenceable()
 }
 
 
-void
+int32
 BReferenceable::AcquireReference()
 {
-	if (atomic_add(&fReferenceCount, 1) == 0)
+	int32 previousReferenceCount = atomic_add(&fReferenceCount, 1);
+	if (previousReferenceCount == 0)
 		FirstReferenceAcquired();
 
 	TRACE("%p: acquire %ld\n", this, fReferenceCount);
+
+	return previousReferenceCount;
 }