Module: xenomai-2.5
Branch: master
Commit: 126dbeaac5f17b7a006bd98783aea9bf1d8958f9
URL:
http://git.xenomai.org/?p=xenomai-2.5.git;a=commit;h=126dbeaac5f17b7a006bd98783aea9bf1d8958f9
Author: Alexis Berlemont <alexis.berlem...@gmail.com>
Date: Fri Oct 22 22:20:21 2010 +0200
analogy: add a "sys" function for the ioctl BUFCONFIG
The tool analogy_config uses the level 0 of the library API. At this
level, a function was missing to configure the default buffer size.
---
include/analogy/analogy.h | 2 ++
src/drvlib/analogy/async.c | 9 ++++-----
src/drvlib/analogy/sys.c | 33 +++++++++++++++++++++++++++++++++
3 files changed, 39 insertions(+), 5 deletions(-)
diff --git a/include/analogy/analogy.h b/include/analogy/analogy.h
index c40f2e7..88f7f1a 100644
--- a/include/analogy/analogy.h
+++ b/include/analogy/analogy.h
@@ -47,6 +47,8 @@ int a4l_sys_attach(int fd, a4l_lnkdesc_t * arg);
int a4l_sys_detach(int fd);
+int a4l_sys_bufcfg(int fd, unsigned int idx_subd, unsigned long size);
+
int a4l_sys_desc(int fd, a4l_desc_t * dsc, int pass);
int a4l_sys_devinfo(int fd, a4l_dvinfo_t * info);
diff --git a/src/drvlib/analogy/async.c b/src/drvlib/analogy/async.c
index f342af3..176a289 100644
--- a/src/drvlib/analogy/async.c
+++ b/src/drvlib/analogy/async.c
@@ -109,8 +109,9 @@ int a4l_snd_cancel(a4l_desc_t * dsc, unsigned int idx_subd)
*
* @return 0 on success. Otherwise:
*
- * - -EINVAL is returned if some argument is missing or wrong (Please,
- * type "dmesg" for more info)
+ * - -EINVAL is returned if the analogy descriptor is not correct or
+ if some argument is missing or wrong (Please, type "dmesg" for
+ more info)
* - -EPERM is returned if the function is called in an RT context or
* if the buffer to resize is mapped in user-space (Please, type
* "dmesg" for more info)
@@ -123,13 +124,11 @@ int a4l_snd_cancel(a4l_desc_t * dsc, unsigned int
idx_subd)
int a4l_set_bufsize(a4l_desc_t * dsc,
unsigned int idx_subd, unsigned long size)
{
- a4l_bufcfg_t cfg = { idx_subd, size };
-
/* Basic checking */
if (dsc == NULL || dsc->fd < 0)
return -EINVAL;
- return __sys_ioctl(dsc->fd, A4L_BUFCFG, &cfg);
+ return a4l_sys_bufcfg(dsc->fd, idx_subd, size);
}
/**
diff --git a/src/drvlib/analogy/sys.c b/src/drvlib/analogy/sys.c
index 51edcfe..4f22b45 100644
--- a/src/drvlib/analogy/sys.c
+++ b/src/drvlib/analogy/sys.c
@@ -179,4 +179,37 @@ int a4l_sys_detach(int fd)
return __sys_ioctl(fd, A4L_DEVCFG, NULL);
}
+/**
+ * @brief Configure the buffer size
+ *
+ *
+ * This function can configure the buffer size of the file descriptor
+ * currently in use. If the subdevice index is set to
+ * A4L_BUF_DEFMAGIC, it can also define the default buffser size at
+ * open time.
+ *
+ * @param[in] fd File descriptor as returned by a4l_sys_open()
+ * @param[in] idx_subd Index of the concerned subdevice
+ * @param[int] size Buffer size to be set
+ *
+ * @return 0 on success. Otherwise:
+ *
+ * - -EINVAL is returned if some argument is missing or wrong (Please,
+ * type "dmesg" for more info)
+ * - -EPERM is returned if the function is called in an RT context or
+ * if the buffer to resize is mapped in user-space (Please, type
+ * "dmesg" for more info)
+ * - -EFAULT is returned if a user <-> kernel transfer went wrong
+ * - -EBUSY is returned if the selected subdevice is already
+ * processing an asynchronous operation
+ * - -ENOMEM is returned if the system is out of memory
+ *
+ */
+int a4l_sys_bufcfg(int fd, unsigned int idx_subd, unsigned long size)
+{
+ a4l_bufcfg_t cfg = { idx_subd, size };
+
+ return __sys_ioctl(fd, A4L_BUFCFG, &cfg);
+}
+
/** @} */
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