уничтожить и инициализировать объект атрибутов потока трассировки (TRACING) (destroy and initialize the trace stream attributes object (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_attr_destroy, posix_trace_attr_init — destroy and
initialize the trace stream attributes object (TRACING)
Синопсис (Synopsis)
#include <trace.h>
int posix_trace_attr_destroy(trace_attr_t *attr);
int posix_trace_attr_init(trace_attr_t *attr);
Описание (Description)
The posix_trace_attr_destroy() function shall destroy an
initialized trace attributes object. A destroyed attr attributes
object can be reinitialized using posix_trace_attr_init(); the
results of otherwise referencing the object after it has been
destroyed are undefined.
The posix_trace_attr_init() function shall initialize a trace
attributes object attr with the default value for all of the
individual attributes used by a given implementation. The read-
only generation-version and clock-resolution attributes of the
newly initialized trace attributes object shall be set to their
appropriate values (see Section 2.11.1.2, posix_trace_status_info
Structure).
Results are undefined if posix_trace_attr_init() is called
specifying an already initialized attr attributes object.
Implementations may add extensions to the trace attributes object
structure as permitted in the Base Definitions volume of
POSIX.1‐2017, Chapter 2, Conformance.
The resulting attributes object (possibly modified by setting
individual attributes values), when used by posix_trace_create(),
defines the attributes of the trace stream created. A single
attributes object can be used in multiple calls to
posix_trace_create(). After one or more trace streams have been
created using an attributes object, any function affecting that
attributes object, including destruction, shall not affect any
trace stream previously created. An initialized attributes object
also serves to receive the attributes of an existing trace stream
or trace log when calling the posix_trace_get_attr() function.
Возвращаемое значение (Return value)
Upon successful completion, these functions shall return a value
of zero. Otherwise, they shall return the corresponding error
number.
Ошибки (Error)
The posix_trace_attr_destroy() function may fail if:
EINVAL The value of attr is invalid.
The posix_trace_attr_init() function shall fail if:
ENOMEM Insufficient memory exists to initialize the trace
attributes object.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
The posix_trace_attr_destroy() and posix_trace_attr_init()
functions may be removed in a future version.
Смотри также (See also)
posix_trace_create(3p), posix_trace_get_attr(3p), uname(3p)
The Base Definitions volume of POSIX.1‐2017, trace.h(0p)
