Adjust ReleaseReference() to also return the previous ref count as

AcquireReference() now does, and adjust all callers that relied on the previous
return type.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42091 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/shared/Referenceable.h

@@ -17,9 +17,10 @@ public:
 								BReferenceable();
 	virtual						~BReferenceable();
 
+								// acquire and release return
+								// the previous ref count
 			int32				AcquireReference();
-			bool				ReleaseReference();
-									// returns true after last
+			int32				ReleaseReference();
 
 			int32				CountReferences() const
 									{ return fReferenceCount; }

src/add-ons/kernel/file_systems/netfs/server/ClientConnection.cpp

@@ -2789,7 +2789,7 @@ ClientConnection::_PutVolume(ClientVolume* volume)
 
 	// decrement reference counter and remove the volume, if 0
 	AutoLocker<VolumeMap> locker(fVolumes);
-	bool removed = (volume->ReleaseReference() && volume->IsRemoved());
+	bool removed = (volume->ReleaseReference() == 1 && volume->IsRemoved());
 	if (removed)
 		fVolumes->Remove(volume->GetID());
 	locker.Unlock();

src/add-ons/kernel/file_systems/netfs/shared/NetAddress.cpp

@@ -253,7 +253,7 @@ NetAddressResolver::~NetAddressResolver()
 {
 	if (fResolver) {
 		_Lock();
-		if (sResolver->ReleaseReference()) {
+		if (sResolver->ReleaseReference() == 1) {
 			delete sResolver;
 			sResolver = NULL;
 		}

src/kits/support/Referenceable.cpp

@@ -41,14 +41,14 @@ BReferenceable::AcquireReference()
 }
 
 
-bool
+int32
 BReferenceable::ReleaseReference()
 {
-	bool unreferenced = (atomic_add(&fReferenceCount, -1) == 1);
+	int32 previousReferenceCount = atomic_add(&fReferenceCount, -1);
 	TRACE("%p: release %ld\n", this, fReferenceCount);
-	if (unreferenced)
+	if (previousReferenceCount == 1)
 		LastReferenceReleased();
-	return unreferenced;
+	return previousReferenceCount;
 }