iofunc_lock_ocb_default()

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:

The iofunc_lock_ocb_default() function calls iofunc_attr_lock() 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.

EAGAIN

On the first use, all kernel mutex objects were in use.

Classification:

QNX Neutrino

See also:

iofunc_attr_lock(), iofunc_func_init(), iofunc_ocb_t, resmgr_attach(), resmgr_context_t, resmgr_io_funcs_t

Writing a Resource Manager

Resource Managers chapter of Getting Started with QNX Neutrino