added new networking subsystem (early stage - files are not compiled yet during normal build!)

Note
	The files i added / modifications i did, are not affecting a normal build
	nothing gets changed yet!

	Linux 2.5+ only yet.

	


git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@16271 54d463be-8e91-2dee-dedb-b68131a5f0ec

1 files changed, 83 insertions, 0 deletions

diff --git a/src/common/netbuffer.h b/src/common/netbuffer.h
new file mode 100644
index 000000000..844241226
--- /dev/null
+++ b/src/common/netbuffer.h
@@ -0,0 +1,83 @@
+// Copyright (c) rAthena Project (www.rathena.org) - Licensed under GNU GPL
+// For more information, see LICENCE in the main folder
+
+#ifndef _rA_NETBUFFER_H_
+#define _rA_NETBUFFER_H_
+
+#include "../common/cbasetypes.h"
+
+typedef struct netbuf{
+	sysint	pool;				// The pool ID this buffer belongs to,
+								// is set to -1 if its an emergency allocated buffer 
+	
+	struct netbuf *next;		// Used by Network system.
+
+	volatile int32 refcnt;		// Internal Refcount, it gets lowered every call to netbuffer_put, 
+								// if its getting zero, the buffer will returned back to the pool
+								// and can be reused.
+
+	int32	dataPos;	// Current Offset
+						// Used only for Reading (recv job)
+						// write cases are using the sessions local datapos member due to
+						// shared write buffer support.
+	
+	int32	dataLen;	// read buffer case:
+						//	The length expected to read to.
+						//	when this->dataPos == dateLen, read job has been completed.
+						// write buffer case:
+						//	The lngth of data in te buffer
+						//	when s->dataPos == dataLen, write job has been completed
+						//
+						// Note:
+						//	leftBytes = (dateLen - dataPos)
+						//
+						//	Due to shared buffer support
+						//	dataPos gets not used in write case (each connection has its local offset)
+						//
+
+	// The Bufferspace itself.
+	char buf[32];
+} *netbuf;
+
+
+void netbuffer_init();
+void netbuffer_final();
+
+/**
+ * Gets a netbuffer that has atleast (sz) byes space.
+ *
+ * @note: The netbuffer system guarantees that youll always recevie a buffer.
+ *			no check for null is required!
+ *
+ * @param sz - minimum size needed.
+ *
+ * @return pointer to netbuf struct
+ */
+netbuf netbuffer_get( sysint sz );
+
+
+/** 
+ * Returns the given netbuffer (decreases refcount, if its 0 - the buffer will get returned to the pool)
+ *
+ * @param buf - the buffer to return 
+ */
+void netbuffer_put( netbuf buf );
+
+
+/** 
+ * Increases the Refcount on the given buffer 
+ * (used for areasends .. etc)
+ *
+ */
+void netbuffer_incref( netbuf buf );
+
+
+// Some Useful macros
+#define NBUFP(netbuf,pos) (((uint8*)(netbuf->buf)) + (pos))
+#define NBUFB(netbuf,pos) (*(uint8*)((netbuf->buf) + (pos)))
+#define NBUFW(netbuf,pos) (*(uint16*)((netbuf->buf) + (pos)))
+#define NBUFL(netbuf,pos) (*(uint32*)((netbuf->buf) + (pos)))
+
+
+
+#endif