snd_ctl_add_vmaster_hook(9) [centos man page]

SND_CTL_ADD_VMASTER_(9) 					 Control/Mixer API					   SND_CTL_ADD_VMASTER_(9)

NAME

       snd_ctl_add_vmaster_hook - Add a hook to a vmaster control

SYNOPSIS

       int snd_ctl_add_vmaster_hook(struct snd_kcontrol * kcontrol, void (*hook) (void *private_data, int), void * private_data);

ARGUMENTS

       kcontrol
	   vmaster kctl element

       hook
	   the hook function

       private_data
	   the private_data pointer to be saved

DESCRIPTION

       Adds the given hook to the vmaster control element so that it's called at each time when the value is changed.

RETURN

       Zero.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   SND_CTL_ADD_VMASTER_(9)

hook_t(9S)						    Data Structures for Drivers 						hook_t(9S)

NAME

       hook_t - callback structure for subscribing to netinfo events

SYNOPSIS

       #include <sys/hook.h>

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

DESCRIPTION

       The  hook_t  data structure defines a callback that is to be inserted into a networking event. This data structure must be allocated with a
       call to hook_alloc() and released with a call to hook_free().

STRUCTURE MEMBERS

	 hook_func_t  h_func;	   /* callback function to invoke */
	 char	      *h_name;	   /* unique name given to the hook */
	 int	      h_flags;
	 hook_hint_t  h_hint;	   /* insertion hint type */
	 uintptr_t    h_hintvalue; /* used with h_hint */
	 void	      *h_arg;	   /* value to pass into h_func */

	 typedef int (*hook_func_t)(net_event_t token, hook_data_t info,
		       void *);

   HINT TYPES
       Hook hints are hints that are used at the time of insertion and are not rules that enforce where a hook lives for its entire lifetime on an
       event. The valid values for the h_hint field are:

       HH_NONE	    Insert the hook wherever convenient.

       HH_FIRST     Place the hook first on the list of hooks.

       HH_LAST	    Place the hook last on the list of hooks.

       HH_BEFORE    Place  the	hook  before  another hook on the list of hooks. The value in h_hintvalue must be a pointer to the name of another
		    hook.

       HH_AFTER     Place the hook after another hook on the list of hooks. The value in h_hintvalue must be a pointer	to  the  name  of  another
		    hook.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       netinfo(9F)

SunOS 5.11							    1 May 2008								hook_t(9S)