petsc-3.7.7 2017-09-25

PetscOptionsMonitorSet

Sets an ADDITIONAL function to be called at every method that modified the PETSc options database.

Synopsis

#include "petscsys.h"   
PetscErrorCode  PetscOptionsMonitorSet(PetscErrorCode (*monitor)(const char name[], const char value[], void*),void *mctx,PetscErrorCode (*monitordestroy)(void**))

Not collective

Input Parameters

	monitor	- pointer to function (if this is NULL, it turns off monitoring
	mctx	- [optional] context for private data for the monitor routine (use NULL if no context is desired)
	monitordestroy	- [optional] routine that frees monitor context (may be NULL)

Calling Sequence of monitor

    monitor (const char name[], const char value[], void *mctx)

	name	- option name string
	value	- option value string
	mctx	- optional monitoring context, as set by PetscOptionsMonitorSet()

Options Database Keys

	-options_monitor	- sets PetscOptionsMonitorDefault()
	-options_monitor_cancel	- cancels all monitors that have been hardwired into a code by calls to PetscOptionsMonitorSet(), but does not cancel those set via the options database.

Notes

The default is to do nothing. To print the name and value of options being inserted into the database, use PetscOptionsMonitorDefault() as the monitoring routine, with a null monitoring context.

Several different monitoring routines may be set by calling PetscOptionsMonitorSet() multiple times; all will be called in the order in which they were set.

Keywords

PetscOptions, set, monitor