[Libsysio-commit] HEAD: libsysio/include inode.h

[Lee W. <lw...@us...>]

Update of /cvsroot/libsysio/libsysio/include
In directory sc8-pr-cvs6.sourceforge.net:/tmp/cvs-serv14759/include

Modified Files:
	inode.h 
Log Message:


- No longer maintain a list of all pnodes in the system.

+ Introduce a list of idle pnodes for use by the garbage collector.


Index: inode.h
===================================================================
RCS file: /cvsroot/libsysio/libsysio/include/inode.h,v
retrieving revision 1.33
retrieving revision 1.34
diff -u -w -b -B -p -r1.33 -r1.34
--- inode.h	21 Sep 2007 19:41:37 -0000	1.33
+++ inode.h	21 Sep 2007 20:12:55 -0000	1.34
@@ -259,7 +259,7 @@ struct pnode {
     struct mount *p_mount;                              /* mount info */
     struct pnode *p_cover;                              /* covering pnode */
     LIST_ENTRY(pnode) p_links;                          /* other aliases */
-    TAILQ_ENTRY(pnode) p_nodes;                         /* all nodes links */
+    TAILQ_ENTRY(pnode) p_idle;                          /* idle list links */
 };
 
 /*
@@ -267,9 +267,8 @@ struct pnode {
  */
 #define P_REF(pno) \
     do { \
-        TAILQ_REMOVE(&_sysio_pnodes, (pno), p_nodes); \
-        TAILQ_INSERT_TAIL(&_sysio_pnodes, (pno), p_nodes); \
-        (pno)->p_ref++; \
+        if (!(pno)->p_ref++) \
+            TAILQ_REMOVE(&_sysio_idle_pnodes, (pno), p_idle); \
         assert((pno)->p_ref); \
     } while (0)
 
@@ -279,7 +278,8 @@ struct pnode {
 #define P_RELE(pno) \
     do { \
         assert((pno)->p_ref); \
-        --(pno)->p_ref; \
+        if (!--(pno)->p_ref) \
+            TAILQ_INSERT_TAIL(&_sysio_idle_pnodes, (pno), p_idle); \
     } while (0)
 
 /*
@@ -487,7 +487,7 @@ struct ioctx {
 extern struct pnode *_sysio_root;
 
 extern TAILQ_HEAD(inodes_head, inode) _sysio_inodes;
-extern TAILQ_HEAD(pnodes_head, pnode) _sysio_pnodes;
+extern TAILQ_HEAD(pnodes_head, pnode) _sysio_idle_pnodes;
 
 extern int _sysio_i_init(void);
 #ifdef ZERO_SUM_MEMORY