PROLOG<\/a> This manual page is part of the POSIX Programmer\u2019s 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.<\/p>\n posix_trace_attr_destroy, posix_trace_attr_init \u2014 destroy and initialize the trace stream attributes object (TRACING<\/b>)<\/p>\n #include int posix_trace_attr_destroy(trace_attr_t *attr<\/i>); The posix_trace_attr_destroy<\/i>() function shall destroy an initialized trace attributes object. A destroyed attr<\/i> attributes object can be reinitialized using posix_trace_attr_init<\/i>(); the results of otherwise referencing the object after it has been destroyed are undefined.<\/p>\n The posix_trace_attr_init<\/i>() function shall initialize a trace attributes object attr<\/i> with the default value for all of the individual attributes used by a given implementation. The read-only generation-version<\/i> and clock-resolution<\/i> attributes of the newly initialized trace attributes object shall be set to their appropriate values (see Section 2.11.1.2<\/i>, posix_trace_status_info Structure<\/i>).<\/p>\n Results are undefined if posix_trace_attr_init<\/i>() is called specifying an already initialized attr<\/i> attributes object.<\/p>\n Implementations may add extensions to the trace attributes object structure as permitted in the Base Definitions volume of POSIX.1-2017, Chapter 2<\/i>, Conformance<\/i>.<\/p>\n The resulting attributes object (possibly modified by setting individual attributes values), when used by posix_trace_create<\/i>(), defines the attributes of the trace stream created. A single attributes object can be used in multiple calls to posix_trace_create<\/i>(). 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<\/i>() function.<\/p>\n Upon successful completion, these functions shall return a value of zero. Otherwise, they shall return the corresponding error number.<\/p>\n The posix_trace_attr_destroy<\/i>() function may fail if:<\/p>\n
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int posix_trace_attr_init(trace_attr_t *attr<\/i>);<\/p>\nDESCRIPTION <\/a> <\/h2>\n
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