diff options
author | Chris Johns <chrisj@rtems.org> | 2010-02-18 00:24:25 +0000 |
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committer | Chris Johns <chrisj@rtems.org> | 2010-02-18 00:24:25 +0000 |
commit | a9fa9b765df38cc5319ae734b5148fd47ebbfd8d (patch) | |
tree | 55ee28ea4a162bfb26c7a2cb6106b057beda70ae /cpukit/libfs/src/rfs/rtems-rfs-mutex.c | |
parent | 7a115ee642f0e9c0a5d5b66937b118c2ace79235 (diff) |
2010-02-18 Chris Johns <chrisj@rtems.org>
* libfs/src/rfs/rtems-rfs-bitmaps.c,
libfs/src/rfs/rtems-rfs-bitmaps.h,
libfs/src/rfs/rtems-rfs-bitmaps-ut.c,
libfs/src/rfs/rtems-rfs-block.c, libfs/src/rfs/rtems-rfs-block.h,
libfs/src/rfs/rtems-rfs-block-pos.h,
libfs/src/rfs/rtems-rfs-buffer-bdbuf.c,
libfs/src/rfs/rtems-rfs-buffer.c,
libfs/src/rfs/rtems-rfs-buffer-devio.c,
libfs/src/rfs/rtems-rfs-buffer.h, libfs/src/rfs/rtems-rfs-data.h,
libfs/src/rfs/rtems-rfs-dir.c, libfs/src/rfs/rtems-rfs-dir.h,
libfs/src/rfs/rtems-rfs-dir-hash.c,
libfs/src/rfs/rtems-rfs-dir-hash.h,
libfs/src/rfs/rtems-rfs-file.c, libfs/src/rfs/rtems-rfs-file.h,
libfs/src/rfs/rtems-rfs-file-system.c,
libfs/src/rfs/rtems-rfs-file-system-fwd.h,
libfs/src/rfs/rtems-rfs-file-system.h,
libfs/src/rfs/rtems-rfs-format.c,
libfs/src/rfs/rtems-rfs-format.h, libfs/src/rfs/rtems-rfs-group.c,
libfs/src/rfs/rtems-rfs-group.h, libfs/src/rfs/rtems-rfs.h,
libfs/src/rfs/rtems-rfs-inode.c, libfs/src/rfs/rtems-rfs-inode.h,
libfs/src/rfs/rtems-rfs-link.c, libfs/src/rfs/rtems-rfs-link.h,
libfs/src/rfs/rtems-rfs-mutex.c, libfs/src/rfs/rtems-rfs-mutex.h,
libfs/src/rfs/rtems-rfs-rtems.c,
libfs/src/rfs/rtems-rfs-rtems-dev.c,
libfs/src/rfs/rtems-rfs-rtems-dir.c,
libfs/src/rfs/rtems-rfs-rtems-file.c,
libfs/src/rfs/rtems-rfs-rtems.h,
libfs/src/rfs/rtems-rfs-rtems-utils.c,
libfs/src/rfs/rtems-rfs-shell.c, libfs/src/rfs/rtems-rfs-shell.h,
libfs/src/rfs/rtems-rfs-trace.c, libfs/src/rfs/rtems-rfs-trace.h:
New.
* Makefile.am, preinstall.am, libfs/Makefile.am,
wrapup/Makefile.am: Updated with the RFS support.
* libfs/README: Updated after 10 years.
* libblock/src/flashdisk.c, libblock/src/nvdisk.c,
libblock/src/ramdisk-driver.c: Updated to the new error reporting
in libblock.
* libmisc/shell/main_ls.c, libmisc/shell/print-ls.c: Fix printing
the size in long mode.
* libnetworking/nfs/bootp_subr.c,
libnetworking/rtems/rtems_bootp.c,
libnetworking/rtems/rtems_bsdnet_internal.h: Return the BOOTP/DHCP
to the forever behaviour of 4.9 with the ability to call BOOTP and
control the process if required.
Diffstat (limited to 'cpukit/libfs/src/rfs/rtems-rfs-mutex.c')
-rw-r--r-- | cpukit/libfs/src/rfs/rtems-rfs-mutex.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/cpukit/libfs/src/rfs/rtems-rfs-mutex.c b/cpukit/libfs/src/rfs/rtems-rfs-mutex.c new file mode 100644 index 0000000000..e67651d269 --- /dev/null +++ b/cpukit/libfs/src/rfs/rtems-rfs-mutex.c @@ -0,0 +1,68 @@ +/* + * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ +/** + * @file + * + * @ingroup rtems-rfs + * + * RTEMS File System Mutex. + */ + +#include <rtems/rfs/rtems-rfs-mutex.h> + +#if __rtems__ +/** + * RTEMS_RFS Mutex Attributes + * + * @warning Do not configure as inherit priority. If a driver is in the driver + * initialisation table this locked semaphore will have the IDLE task + * as the holder and a blocking task will raise the priority of the + * IDLE task which can cause unsual side effects like not work. + */ +#define RTEMS_RFS_MUTEX_ATTRIBS \ + (RTEMS_PRIORITY | RTEMS_SIMPLE_BINARY_SEMAPHORE | \ + RTEMS_NO_INHERIT_PRIORITY | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL) +#endif + +int +rtems_rfs_mutex_create (rtems_rfs_mutex* mutex) +{ +#if __rtems__ + rtems_status_code sc; + sc = rtems_semaphore_create (rtems_build_name ('R', 'F', 'S', 'm'), + 1, RTEMS_RFS_MUTEX_ATTRIBS, 0, + mutex); + if (sc != RTEMS_SUCCESSFUL) + { + if (rtems_rfs_trace (RTEMS_RFS_TRACE_MUTEX)) + printf ("rtems-rfs: mutex: open failed: %s\n", + rtems_status_text (sc)); + return EIO; + } +#endif + return 0; +} + +int +rtems_rfs_mutex_destroy (rtems_rfs_mutex* mutex) +{ +#if __rtems__ + rtems_status_code sc; + sc = rtems_semaphore_delete (*mutex); + if (sc != RTEMS_SUCCESSFUL) + { + if (rtems_rfs_trace (RTEMS_RFS_TRACE_MUTEX)) + printf ("rtems-rfs: mutex: close failed: %s\n", + rtems_status_text (sc)); + return EIO; + } +#endif + return 0; +} |