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protect against multiple inclusion (this is useful when you

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start working with third party usb modules, where sometimes it
is not easy to set the inclusion order so that there are no multiple
inclusions, yet you want to compile with high WARNS levels).

I am not sure if there is a standard for having a leading and/or trailing _
in the macro name, the usb code seems to use both.

There are still several unprotected headers here so it might be useful
to do the same thing on other files as well as the need arises.

MFC After: 3 days
This commit is contained in:
Luigi Rizzo 2007-01-03 10:50:03 +00:00
parent 3f29b2ef51
commit d64492c407
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165749
1 changed files with 3 additions and 0 deletions
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3
sys/dev/usb/usbdi_util.h
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@ -38,6 +38,8 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _USBI_UTIL_H_
#define _USBI_UTIL_H_
usbd_status usbd_get_desc(usbd_device_handle dev, int type,
int index, int len, void *desc);
usbd_status usbd_get_config_desc(usbd_device_handle, int,
@ -93,3 +95,4 @@ const usb_descriptor_t *usb_find_desc(usbd_device_handle dev, int type,
int subtype);
#define USBD_SUBTYPE_ANY (~0)
#endif /* _USBI_UTIL_H_ */