Originální popis anglicky:
posix_trace_clear - clear trace stream and trace log (
TRACING)
Návod, kniha: POSIX Programmer's Manual
#include <sys/types.h>
#include <trace.h>
int posix_trace_clear(trace_id_t
trid);
The
posix_trace_clear() function shall reinitialize the trace stream
identified by the argument
trid as if it were returning from the
posix_trace_create() function, except that the same allocated resources
shall be reused, the mapping of trace event type identifiers to trace event
names shall be unchanged, and the trace stream status shall remain unchanged
(that is, if it was running, it remains running and if it was suspended, it
remains suspended).
All trace events in the trace stream recorded before the call to
posix_trace_clear() shall be lost. The
posix_stream_full_status
status shall be set to POSIX_TRACE_NOT_FULL. There is no guarantee that all
trace events that occurred during the
posix_trace_clear() call are
recorded; the behavior with respect to trace points that may occur during this
call is unspecified.
If the Trace Log option is supported and the trace stream has been created with
a log, the
posix_trace_clear() function shall reinitialize the trace
stream with the same behavior as if the trace stream was created without the
log, plus it shall reinitialize the trace log associated with the trace stream
identified by the argument
trid as if it were returning from the
posix_trace_create_withlog() function, except that the same allocated
resources, for the trace log, may be reused and the associated trace stream
status remains unchanged. The first trace event recorded in the trace log
after the call to
posix_trace_clear() shall be the same as the first
trace event recorded in the active trace stream after the call to
posix_trace_clear(). The
posix_log_full_status status shall be
set to POSIX_TRACE_NOT_FULL. There is no guarantee that all trace events that
occurred during the
posix_trace_clear() call are recorded in the trace
log; the behavior with respect to trace points that may occur during this call
is unspecified. If the log full policy is POSIX_TRACE_APPEND, the effect of a
call to this function is unspecified for the trace log associated with the
trace stream identified by the
trid argument.
Upon successful completion, the
posix_trace_clear() function shall return
a value of zero. Otherwise, it shall return the corresponding error number.
The
posix_trace_clear() function shall fail if:
- EINVAL
- The value of the trid argument does not correspond
to an active trace stream.
The following sections are informative.
None.
None.
None.
None.
posix_trace_attr_init() ,
posix_trace_create() ,
posix_trace_flush() ,
posix_trace_get_attr() , the Base
Definitions volume of IEEE Std 1003.1-2001,
<sys/types.h>,
<trace.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
