Insert a user combine trace event
Synopsis:
#include <sys/neutrino.h>
#include <sys/trace.h>
int trace_logb( int code,
const void *buf,
size_t nbytes );
Arguments:
- code
- The event code, which must be in the range from _NTO_TRACE_USERFIRST through
_NTO_TRACE_USERLAST.
- data
- A pointer to the data to include with the event.
- nbytes
- The length of the data, in bytes.
The function converts this value into the number of 32-bit integers.
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Description:
The trace_() function calls
TraceEvent()
to insert a user combine event of class _NTO_TRACE_USER,
and of the type specified by code.
Returns:
- 0
- Success.
- -1
- An error occurred
(errno is set).
Errors:
- ECANCELED
- The requested action has been canceled.
- EFAULT
- Bad internal trace buffer address.
The requested action has been specified out of order.
- ENOMEM
- Insufficient memory to allocate the trace buffers.
- ENOTSUP
- The requested action isn't supported.
- EPERM
- The application doesn't have permission to perform the action.
Classification:
QNX Neutrino
Safety: |
|
Cancellation point |
No |
Interrupt handler |
Read the Caveats for TraceEvent() |
Signal handler |
Yes |
Thread |
Yes |