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T
trace_logi()
Insert a user simple trace event

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
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QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
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        Insert a trace event for the entry to a function
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        Insert a trace event for the exit from a function
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        Get the flag from the header of a trace event
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        Insert a trace event for the current address
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        Insert a user combine trace event
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        Insert a trace event of an arbitrary class and type with arbitrary data
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        Insert a user string trace event
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        Insert a user simple trace event
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        Insert a user string trace event, specifying a maximum string length
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        Insert a user string trace event, using a variable argument list
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        Control the tracing of kernel events
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        Process trace data
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        Attach a callback to a trace event
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        Set the traceparser debug modes
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        Destroy a traceparser state structure
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        Get information about traceparser
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Typographical Conventions, Support, and Licensing
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trace_logi()

QNX SDP8.0C Library ReferenceAPIDeveloper

Insert a user simple trace event

Synopsis:

#include <sys/neutrino.h>
#include <sys/trace.h>

int trace_logi( int code,
                unsigned d1,
                unsigned d2 );

Arguments:

code: The event code, which must be in the range from _NTO_TRACE_USERFIRST through _NTO_TRACE_USERLAST.
d1, d2: Data to include with the event.

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 simple event of class _NTO_TRACE_USER, and of the type specified by code.

Returns:

0: Success.
-1: An error occurred (errno is set).

Errors:

ENOMEM: Insufficient memory to complete the operation.

Classification:

QNX OS


Safety:
Cancellation point	No
Signal handler	Yes
Thread	Yes

Page updated: August 11, 2025