Tizen(Headless) Native API  6.0
Functions
T-trace
System

The T-trace API provides functions for writing trace message to the system trace buffer.

Required Header

#include <trace.h>

Overview

The T-trace API provides functions for writing trace event to the system trace buffer. By using T-trace tool, These events can be displayed with T-trace event from Tizen framework.

For more information on features, see T-trace User Guide and T-Trace Tutorial.

Functions

void trace_begin (const char *name,...)
 Writes a trace event to indicate that a synchronous event has begun.
void trace_end (void)
 Writes a trace event to indicate that the synchronous event has ended.
void trace_async_begin (int cookie, const char *name,...)
 Writes a trace event to indicate that an asynchronous event has begun.
void trace_async_end (int cookie, const char *name,...)
 Writes a trace event to indicate that the asynchronous event has ended.
void trace_update_counter (int value, const char *name,...)
 Writes a trace event to track change of integer counter.

Enumeration Type Documentation

enum trace_error_e

Enumeration for Trace Error.

Since :
2.4
Enumerator:
TRACE_ERROR_NONE 

Successful

TRACE_ERROR_IO_ERROR 

I/O error

Function Documentation

void trace_async_begin ( int  cookie,
const char *  name,
  ... 
)

Writes a trace event to indicate that an asynchronous event has begun.

Since :
2.4
Remarks:
The specific error code can be obtained using the get_last_result() method. Error codes are described in Exception section.
Parameters:
[in]cookieAn unique identifier for distinguishing simultaneous events
[in]nameThe name of event (optionally containing format specifiers)
Exceptions:
TRACE_ERROR_NONESuccess
TRACE_ERROR_IO_ERRORI/O error
See also:
trace_async_end()
void trace_async_end ( int  cookie,
const char *  name,
  ... 
)

Writes a trace event to indicate that the asynchronous event has ended.

Since :
2.4
Remarks:
trace_async_end() ends matched trace_async_begin() which has same cookie and name.
The specific error code can be obtained using the get_last_result() method. Error codes are described in Exception section.
Parameters:
[in]cookieAn unique identifier for distinguishing simultaneous events
[in]nameThe name of event (optionally containing format specifiers)
Exceptions:
TRACE_ERROR_NONESuccess
TRACE_ERROR_IO_ERRORI/O error
See also:
trace_async_begin()
void trace_begin ( const char *  name,
  ... 
)

Writes a trace event to indicate that a synchronous event has begun.

Since :
2.4
Remarks:
The specific error code can be obtained using the get_last_result() method. Error codes are described in Exception section.
Parameters:
[in]nameThe name of event (optionally containing format specifiers)
Exceptions:
TRACE_ERROR_NONESuccess
TRACE_ERROR_IO_ERRORI/O error
See also:
trace_end()
void trace_end ( void  )

Writes a trace event to indicate that the synchronous event has ended.

Since :
2.4
Remarks:
trace_end() ends the most recently called trace_begin().
The specific error code can be obtained using the get_last_result() method. Error codes are described in Exception section.
Exceptions:
TRACE_ERROR_NONESuccess
TRACE_ERROR_IO_ERRORI/O error
See also:
trace_begin()
void trace_update_counter ( int  value,
const char *  name,
  ... 
)

Writes a trace event to track change of integer counter.

Since :
2.4
Remarks:
The specific error code can be obtained using the get_last_result() method. Error codes are described in Exception section.
Parameters:
[in]valueThe counter value
[in]nameThe name of event (optionally containing format specifiers)
Exceptions:
TRACE_ERROR_NONESuccess
TRACE_ERROR_IO_ERRORI/O error