iofunc_lock_ocb_default()
QNX SDP8.0C Library ReferenceAPIDeveloper
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:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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