diff options
author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2011-05-13 13:46:43 +0000 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2011-05-13 13:46:43 +0000 |
commit | 158b416c7264d5f67b512c43fa5567e396ba774c (patch) | |
tree | 6c16bf09c4db4b7ef71b0f0616f360e559f15eb6 /cpukit/libmisc/devnull | |
parent | b49648c5a2de4d21f2ffdb1d9d0f0cd0d37b13f1 (diff) |
2011-05-13 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libmisc/devnull/devzero.c, libmisc/devnull/devzero.h: New files.
* libmisc/Makefile.am, Makefile.am, preinstall.am: Reflect changes
above.
Diffstat (limited to 'cpukit/libmisc/devnull')
-rw-r--r-- | cpukit/libmisc/devnull/devzero.c | 88 | ||||
-rw-r--r-- | cpukit/libmisc/devnull/devzero.h | 78 |
2 files changed, 166 insertions, 0 deletions
diff --git a/cpukit/libmisc/devnull/devzero.c b/cpukit/libmisc/devnull/devzero.c new file mode 100644 index 0000000000..621d9a02fe --- /dev/null +++ b/cpukit/libmisc/devnull/devzero.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2011 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Obere Lagerstr. 30 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * 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. + * + * $Id$ + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/devzero.h> + +#include <string.h> + +#include <rtems/libio.h> + +rtems_device_driver dev_zero_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return rtems_io_register_name(DEVZERO_DEVICE_NAME, major, 0); +} + +rtems_device_driver dev_zero_open( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_close( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_read( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + rtems_libio_rw_args_t *rw = arg; + + rw->bytes_moved = rw->count; + memset(rw->buffer, 0, rw->count); + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_write( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg +) +{ + rtems_libio_rw_args_t *rw = arg; + + rw->bytes_moved = rw->count; + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver dev_zero_control( + rtems_device_major_number major __attribute__((unused)), + rtems_device_minor_number minor __attribute__((unused)), + void *arg __attribute__((unused)) +) +{ + return RTEMS_IO_ERROR; +} diff --git a/cpukit/libmisc/devnull/devzero.h b/cpukit/libmisc/devnull/devzero.h new file mode 100644 index 0000000000..7e5fb62a29 --- /dev/null +++ b/cpukit/libmisc/devnull/devzero.h @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2011 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Obere Lagerstr. 30 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * 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. + * + * $Id$ + */ + +#ifndef _RTEMS_DEVZERO_H +#define _RTEMS_DEVZERO_H + +#include <rtems/io.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#define DEVZERO_DEVICE_NAME "/dev/zero" + +#define DEVZERO_DRIVER_TABLE_ENTRY \ + { \ + dev_zero_initialize, \ + dev_zero_open, \ + dev_zero_close, \ + dev_zero_read, \ + dev_zero_write, \ + dev_zero_control \ + } + +rtems_device_driver dev_zero_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +rtems_device_driver dev_zero_open( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +rtems_device_driver dev_zero_close( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +rtems_device_driver dev_zero_read( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +rtems_device_driver dev_zero_write( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +rtems_device_driver dev_zero_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg +); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* _RTEMS_DEVZERO_H */ |