iofunc_unblock_default()
Default unblock handler
Synopsis:
#include <sys/iofunc.h> int iofunc_unblock_default( resmgr_context_t * ctp, io_pulse_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_pulse_t structure that describes the pulse that the resource manager received.
- 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_unblock_default() function calls iofunc_unblock() .
The iofunc_unblock_default() function implements the functionality required when the client requests to be unblocked (e.g. a signal or timeout).
You can place this function directly into the io_funcs table passed to resmgr_attach() , at the unblock position, or you can call iofunc_func_init() to initialize all of the functions to their default values.
The unblock message is synthesized by the resource-manager shared library when a client wishes to unblock from its MsgSendv() to the resource manager. The iofunc_unblock_default() function takes care of freeing up any locks that the client may have placed on the resource.
Returns:
- _RESMGR_DEFAULT
- No client connection was found.
- _RESMGR_NOREPLY
- A client connection has been unblocked.
Examples:
If you're calling iofunc_lock_default() , your unblock handler should call iofunc_unblock_default():
if((status = iofunc_unblock_default(...)) != _RESMGR_DEFAULT) { return status; } /* Do your own thing to look for a client to unblock */
Classification:
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |