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- Added functions which modify the callback function and the userdata pointer

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stored in a low level unbuffered file/socket data structure. These function
  perform the proper locking and are thus safe to use in a thread-safe environment.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15166 87f5fb63-7c3d-0410-a384-fd976d0f7a62
This commit is contained in:
Olaf Barthel
2006-11-15 09:17:04 +00:00
parent e9659f46d6
commit 70d1e4b7a3
7 changed files with 226 additions and 3 deletions
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23
library/include/sys/clib2_io.h
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@ -1,5 +1,5 @@
/*
* $Id: clib2_io.h,v 1.1 2006-11-15 08:51:07 obarthel Exp $
* $Id: clib2_io.h,v 1.2 2006-11-15 09:17:04 obarthel Exp $
*
* :ts=4
*
@ -153,6 +153,27 @@ struct _fd
/****************************************************************************/
/* Obtain a pointer to the _fd data structure associated with a file
descriptor number. Note that this does not perform any locking, which
means that you have to be absolutely certain that the file will not be
closed while you are still looking at it. This function can return
NULL if the file descriptor you provided is not valid. */
extern struct _fd * __get_fd(int file_descriptor);
/* Replaces the action callback function and (optionally) returns the old
function pointer; returns 0 for success and -1 for failure if you
provided an invalid file descriptor. This function performs proper locking
and is thus safe to use in a thread-safe environment. */
extern int __change_fd_action(int file_descriptor,_file_action_fd_t new_action,_file_action_fd_t * old_action_ptr);
/* Replaces the user data pointer and (optionally) returns the old user
data pointer; returns 0 for success and -1 for failure if you
provided an invalid file descriptor. This function performs proper locking
and is thus safe to use in a thread-safe environment. */
extern int __change_fd_user_data(int file_descriptor,void * new_user_data,void ** old_user_data_ptr);
/****************************************************************************/
#ifdef __cplusplus
}
#endif /* __cplusplus */