iofunc_lock_ocb_default()

Updated: October 26, 2022

Default handler for the lock_ocb callout

Synopsis:

#include <sys/iofunc.h>

int iofunc_lock_ocb_default( resmgr_context_t *ctp, 
                             void *reserved, 
                             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.
reserved
This argument must be NULL.
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:

If the mount structure supplies lock and unlock functions (ocb->attr->mount->funcs->attr_lock and attr_unlock), the attr_lock from the mount structure will be called, otherwise, iofunc_attr_lock() will be called to enforce locking on the attributes for the group of messages that were sent by the client.

You can place this function directly into the io_funcs table passed to resmgr_attach(), at the lock_ocb position, or you can call iofunc_func_init() to initialize all of the functions to their default values.

Returns:

EOK
Success.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes