[Libsysio-commit] HEAD: libsysio/dev/stdfd stdfd.c

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

Update of /cvsroot/libsysio/libsysio/dev/stdfd
In directory sc8-pr-cvs1:/tmp/cvs-serv31768/dev/stdfd

Modified Files:
	stdfd.c 
Log Message:


The IO context record supported one call-back. It now supports a
chain. This was changed to accommodate the Sandia-PVFS driver. Also, it's
needed for the, coming, {read,write}_strided calls.

To add a callback to the chain use:

 _sysio_ioctx_cb(struct ioctx *ioctx,
		 void (*func)(struct ioctx *, void *),
		 void *data)

Callbacks are added to the end of the existing chain. When called, by
_sysio_io_complete, they are run in order. So... If you're freeing
things using callbacks be careful not to depend on something in a
later callback that you previously free'd.

Also, _sysio_io_complete no longer waits for the driver. To call this, now,
is to signal completion.


Index: stdfd.c
===================================================================
RCS file: /cvsroot/libsysio/libsysio/dev/stdfd/stdfd.c,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -w -b -B -p -r1.5 -r1.6
--- stdfd.c	10 Oct 2003 18:50:30 -0000	1.5
+++ stdfd.c	13 Oct 2003 01:04:34 -0000	1.6
@@ -79,11 +79,9 @@
 static int stdfd_open(struct pnode *pno, int flags, mode_t mode);
 static int stdfd_close(struct inode *ino);
 static int stdfd_ipreadv(struct inode *ino,
-			 struct io_arguments *ioargs,
-			 struct ioctx **ioctxp);
+			 struct ioctx *ioctx);
 static int stdfd_ipwritev(struct inode *ino,
-			  struct io_arguments *ioargs,
-			  struct ioctx **ioctxp);
+			  struct ioctx *ioctx);
 static int stdfd_iodone(struct ioctx *ioctx);
 static int stdfd_datasync(struct inode *ino);
 static int stdfd_ioctl(struct inode *ino,
@@ -128,18 +126,12 @@ stdfd_close(struct inode *ino __IS_UNUSE
 static int
 doio(ssize_t (*f)(int, char *, size_t),
      struct inode *ino,
-     struct io_arguments *ioargs,
-     struct ioctx **ioctxp)
+     struct ioctx *ioctx)
 {
-	struct ioctx *ioctx;
 	const struct iovec *iov;
 	size_t	n;
 	ssize_t	cc = 0;
 
-	ioctx = _sysio_ioctx_new(ino, ioargs);
-	if (!ioctx)
-		return -ENOMEM;
-
 	iov = ioctx->ioctx_iovec;
 	for (n = ioctx->ioctx_iovlen, iov = ioctx->ioctx_iovec;
 	     n--;
@@ -159,7 +151,6 @@ doio(ssize_t (*f)(int, char *, size_t),
 		ioctx->ioctx_errno = -cc;
 	}
 
-	*ioctxp = ioctx;
 	return 0;
 }
 
@@ -172,11 +163,10 @@ stdfd_read(int fd, char *buf, size_t nby
 
 static int
 stdfd_ipreadv(struct inode *ino,
-	      struct io_arguments *ioargs,
-	      struct ioctx **ioctxp)
+	      struct ioctx *ioctx)
 {
 
-	return doio(stdfd_read, ino, ioargs, ioctxp);
+	return doio(stdfd_read, ino, ioctx);
 }
 
 static ssize_t
@@ -190,14 +180,12 @@ stdfd_write(int fd,
 
 static int
 stdfd_ipwritev(struct inode *ino,
-	       struct io_arguments *ioargs,
-	       struct ioctx **ioctxp)
+	       struct ioctx *ioctx)
 {
 
 	return doio((ssize_t (*)(int, char *, size_t))stdfd_write,
 		    ino,
-		    ioargs,
-		    ioctxp);
+		    ioctx);
 }
 
 static int