[Libsysio-commit] b_lustre: libsysio/include sysio.h

[Mei <me...@us...>]

Update of /cvsroot/libsysio/libsysio/include
In directory sc8-pr-cvs1:/tmp/cvs-serv5026/include

Modified Files:
      Tag: b_lustre
	sysio.h 
Log Message:
make lustre could hook functions on when enter/leave system calls.



Index: sysio.h
===================================================================
RCS file: /cvsroot/libsysio/libsysio/include/sysio.h,v
retrieving revision 1.7
retrieving revision 1.7.4.1
diff -u -w -b -B -p -r1.7 -r1.7.4.1
--- sysio.h	26 Mar 2003 00:06:04 -0000	1.7
+++ sysio.h	29 Jun 2003 10:15:32 -0000	1.7.4.1
@@ -183,3 +183,25 @@ extern int mount(const char *source, con
 		 unsigned long mountflags,
 		 const void *data);
 extern int umount(const char *target);
+
+/* This allow lustre's function hook into libsysio */
+extern int  __sysio_in_syscall;
+typedef void __sysio_hook_func(void);
+extern __sysio_hook_func *__sysio_hook_sys_enter;
+extern __sysio_hook_func *__sysio_hook_sys_leave;
+
+#define SYSIO_ENTER					\
+	do {						\
+		if (__sysio_hook_sys_enter)		\
+			__sysio_hook_sys_enter();	\
+		if (__sysio_in_syscall++)		\
+			abort();			\
+	} while(0)
+
+#define SYSIO_LEAVE					\
+	do {						\
+		if (--__sysio_in_syscall != 0)		\
+			abort();			\
+		if (__sysio_hook_sys_leave)		\
+			__sysio_hook_sys_leave();	\
+	} while(0)