iofunc_close_dup_default()
QNX SDP8.0C Library ReferenceAPIDeveloper
Default handler for _IO_CLOSE messages
Synopsis:
#include <sys/iofunc.h>
int iofunc_close_dup_default(
resmgr_context_t *ctp,
io_close_t *msg,
iofunc_ocb_t *ocb );
Arguments:
- ctp
- A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.
- msg
- A pointer to the io_close_t structure that contains the message that the resource manager received. For more information, see the documentation for iofunc_close_dup().
- ocb
- A pointer to the iofunc_ocb_t structure for the Open Control Block that was created when the client opened the resource.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The iofunc_close_dup_default() function implements default actions for the _IO_CLOSE message. This function simply calls iofunc_close_dup() to do the actual work.
You can place iofunc_close_dup_default() directly into the resmgr_io_funcs_t table passed as the io_funcs argument to resmgr_attach(), at the close_dup position, or you can call iofunc_func_init() to initialize all of the functions to their default values.
Note:
If your resource manager uses
iofunc_lock_default(),
you must use both iofunc_close_dup_default() and
iofunc_unblock_default()
in their respective handlers, as they provide
necessary ancillary functionality for managing file locks.
This is because file locks are owned by the process, and aren't
inherited by the child process.
Returns:
- EOK
- Successful completion.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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