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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/include/rtems/libio.h | |
| 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/include/rtems/libio.h')
| -rw-r--r-- | cpukit/libcsupport/include/rtems/libio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/cpukit/libcsupport/include/rtems/libio.h b/cpukit/libcsupport/include/rtems/libio.h index 9268aed2e1..b42ff93dec 100644 --- a/cpukit/libcsupport/include/rtems/libio.h +++ b/cpukit/libcsupport/include/rtems/libio.h @@ -786,6 +786,8 @@ typedef int (*rtems_filesystem_close_t)( /** * @brief Reads from a node. * + * This handler is responsible to update the offset field of the IO descriptor. + * * @param[in, out] iop The IO pointer. * @param[out] buffer The buffer for read data. * @param[in] count The size of the buffer in characters. @@ -804,6 +806,8 @@ typedef ssize_t (*rtems_filesystem_read_t)( /** * @brief Writes to a node. * + * This handler is responsible to update the offset field of the IO descriptor. + * * @param[in, out] iop The IO pointer. * @param[out] buffer The buffer for write data. * @param[in] count The size of the buffer in characters. |