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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-05-14 15:21:30 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2012-05-15 10:01:42 +0200 |
| commit | 53da07e436df21f078de665d90442ee5c7166ab7 (patch) | |
| tree | 0249d3ca4e181c677f243907a754dd1e8518bb36 /cpukit/libcsupport/src/sup_fs_deviceio.c | |
| parent | Filesystem: Add shared device IO support (diff) | |
| download | rtems-53da07e436df21f078de665d90442ee5c7166ab7.tar.bz2 | |
Filesystem: PR1255: Move offset update to handlers
It is now the responsibility of the read() and write() handler to update
the offset field of the IO descriptor (rtems_libio_t). This change
makes it possible to protect the IO descriptor from concurrent access by
per file locks.
Diffstat (limited to 'cpukit/libcsupport/src/sup_fs_deviceio.c')
| -rw-r--r-- | cpukit/libcsupport/src/sup_fs_deviceio.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/sup_fs_deviceio.c b/cpukit/libcsupport/src/sup_fs_deviceio.c index aeff60ea83..74f92cb44c 100644 --- a/cpukit/libcsupport/src/sup_fs_deviceio.c +++ b/cpukit/libcsupport/src/sup_fs_deviceio.c @@ -72,6 +72,8 @@ ssize_t rtems_deviceio_read( status = rtems_io_read( major, minor, &args ); if ( status == RTEMS_SUCCESSFUL ) { + iop->offset += args.bytes_moved; + return (ssize_t) args.bytes_moved; } else { return rtems_deviceio_errno( status ); @@ -98,6 +100,8 @@ ssize_t rtems_deviceio_write( status = rtems_io_write( major, minor, &args ); if ( status == RTEMS_SUCCESSFUL ) { + iop->offset += args.bytes_moved; + return (ssize_t) args.bytes_moved; } else { return rtems_deviceio_errno( status ); |