* Port:

- Send() now also gets the message to send as parameter.
  - Added methods to reserve and unreserve space in the buffer.
* RequestAllocator: Uses the port buffer reservation methods now. This allows
  to let more than one RequestAllocator use a Port in a stack-like manner.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29565 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/userlandfs/private/Port.h

@@ -33,10 +33,14 @@ public:
 
 			const Info*			GetInfo() const;
 
-			void*				GetBuffer() const;
-			int32				GetCapacity() const;
+			void*				GetBuffer() const	{ return fBuffer; }
+			int32				GetCapacity() const	{ return fCapacity; }
 
-			status_t			Send(int32 size);
+			void				Reserve(int32 endOffset);
+			void				Unreserve(int32 endOffset);
+			int32				ReservedSize() const { return fReservedSize; }
+
+			status_t			Send(const void* message, int32 size);
 			status_t			Receive(void** _message, size_t* _size,
 									bigtime_t timeout = -1);
 
@@ -46,6 +50,7 @@ private:
 			Info				fInfo;
 			uint8*				fBuffer;
 			int32				fCapacity;
+			int32				fReservedSize;
 			status_t			fInitStatus;
 			bool				fOwner;
 };

headers/private/userlandfs/private/RequestAllocator.h

@@ -61,6 +61,8 @@ private:
 			Port*				fPort;
 			Request*			fRequest;
 			int32				fRequestSize;
+			int32				fPortReservedOffset;
+			int32				fRequestOffset;
 			area_id				fAllocatedAreas[MAX_REQUEST_ADDRESS_COUNT];
 			int32				fAllocatedAreaCount;
 			DeferredInitInfo	fDeferredInitInfos[MAX_REQUEST_ADDRESS_COUNT];