gr_application_register_log_cb

#include <gre/gre.h>

int gr_application_register_log_cb(
  gr_application_t *app,
  gr_log_writer_cb_t cb,
  void *udata,
  gr_log_writer_cb_t *old_cb,
  void **old_udata
);

The gr_application_register_log_cb function will register a handler with the application that will be called when a log message is generated.

Parameters

Parameter	Type	Description
app	gr_application_t*	A pointer to the application handle created using gr_application_create_args.
cb	gr_log_writer_cb_t	The function that should be called to when a log message is generated.
udata	void*	User data that will be passed to the handler when the log message is sent.
old_cb	gr_log_writer_cb_t*	Storage for the previous log callback. This can be NULL.
old_udata	void**	Storage for the previous user data. This can be NULL.

Returns

Type	Description
int	0 if the registration is a success and -1 if the registration fails.