traceparser_cs_range()

Updated: October 26, 2022

Attach a callback to a range of events

Synopsis:

#include <sys/traceparser.h>

int traceparser_cs_range ( 
   struct traceparser_state * stateptr, 
   void * userdata,
   tracep_callb_func_t funcptr, 
   unsigned class,
   unsigned firstevent, 
   unsigned lastevent );

Arguments:

stateptr
A pointer to an opaque data structure that contains the parser's state information, obtained by calling traceparser_init().
userdata
A pointer to arbitrary user data that you want to be passed to the callback function when it's executed.
funcptr
A pointer to the callback function that you want to register. For more information, see Callback function in the entry for traceparser_cs().
class
The class of trace events that you want to invoke the callback function for. For information about the supported classes, see Classes and events in the “Events and the Kernel” chapter of the System Analysis Toolkit User's Guide.
firstevent, lastevent
The range of trace events that you want to invoke the callback function for. The events must be members of the given class. For information about the classes and trace events, see Classes and events in the “Events and the Kernel” chapter of the System Analysis Toolkit User's Guide.

In QNX Neutrino 7.0 or later, you can OR the event numbers with _NTO_TRACE_KERCALL64. In this case, the callback is invoked only for kernel events that include 64-bit data types. You might also want to attach a callback for the events without _NTO_TRACE_KERCALL64.

Library:

libtraceparser

Use the -l traceparser option to qcc to link against this library.

Description:

The traceparser_cs_range() function attaches a callback function, given by the pointer funcptr, to a range of events from firstevent through to lastevent inclusive, from one particular class. You'll use this function if you're creating your own utility for parsing trace data (as an alternative to traceprinter).

Returns:

0
Success.
-1
Failure; errno is set. See also traceparser_get_info() for further details.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler No
Thread No