перебирать сопоставление типов событий трассировки (TRACING) (iterate over a mapping of trace event types (TRACING))
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
posix_trace_eventtypelist_getnext_id,
posix_trace_eventtypelist_rewind — iterate over a mapping of
trace event types (TRACING)
Синопсис (Synopsis)
#include <trace.h>
int posix_trace_eventtypelist_getnext_id(trace_id_t trid,
trace_event_id_t *restrict event, int *restrict unavailable);
int posix_trace_eventtypelist_rewind(trace_id_t trid);
Описание (Description)
The first time posix_trace_eventtypelist_getnext_id() is called,
the function shall return in the variable pointed to by event the
first trace event type identifier of the list of trace events of
the trace stream identified by the trid argument. Successive
calls to posix_trace_eventtypelist_getnext_id() return in the
variable pointed to by event the next trace event type identifier
in that same list. Each time a trace event type identifier is
successfully written into the variable pointed to by the event
argument, the variable pointed to by the unavailable argument
shall be set to zero. When no more trace event type identifiers
are available, and so none is returned, the variable pointed to
by the unavailable argument shall be set to a value different
from zero.
The posix_trace_eventtypelist_rewind() function shall reset the
next trace event type identifier to be read to the first trace
event type identifier from the list of trace events used in the
trace stream identified by trid.
Возвращаемое значение (Return value)
Upon successful completion, these functions shall return a value
of zero. Otherwise, they shall return the corresponding error
number.
The posix_trace_eventtypelist_getnext_id() function stores the
trace event type identifier value in the object pointed to by
event, if successful.
Ошибки (Error)
These functions shall fail if:
EINVAL The trid argument was not a valid trace stream identifier.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
The posix_trace_eventtypelist_getnext_id() and
posix_trace_eventtypelist_rewind() functions may be removed in a
future version.
Смотри также (See also)
posix_trace_event(3p), posix_trace_eventid_equal(3p),
posix_trace_getnext_event(3p)
The Base Definitions volume of POSIX.1‐2017, trace.h(0p)
