pthread_getattr_default_np(3)                         Library Functions Manual

NUME
       pthread_getattr_default_np, pthread_setattr_default_np, - ob<?>ine sau
       stabile<?>te atributele implicite de creare a firelor

BIBLIOTECA
       Biblioteca de fire de execu<?>ie POSIX (libpthread, -lpthread)

SINOPSIS
       #define _GNU_SOURCE             /* Consulta<?>i feature_test_macros(7) */
       #include <pthread.h>

       int pthread_getattr_default_np(pthread_attr_t *attr);
       int pthread_setattr_default_np(const pthread_attr_t *attr);

DESCRIERE
       Func<?>ia pthread_setattr_default_np() stabile<?>te atributele
       implicite utilizate pentru crearea unui nou fir -- adica atributele
       care sunt utilizate atunci cand pthread_create(3) este apelat cu un al
       doilea argument care este NULL. Atributele implicite sunt stabilite
       folosind atributele furnizate in *attr, un obiect de atribute de fir
       ini<?>ializat anterior. Re<?>ine<?>i urmatoarele detalii despre
       obiectul de atribute furnizat:

       o  Valorile atributelor din obiect trebuie sa fie valide.

       o  Atributul stack address nu trebuie sa fie definit in obiect.

       o  Stabilirea atributului stack size la zero inseamna pastrarea
          neschimbata a dimensiunii implicite a stivei.

       Func<?>ia pthread_getattr_default_np() ini<?>ializeaza obiectul
       atributelor firului la care face referire attr astfel incat sa
       con<?>ina atributele implicite utilizate pentru crearea firului.

ERORI-IE<?>IRE
       EINVAL (pthread_setattr_default_np()) Una dintre valorile atributelor
              din attr nu este valabila sau atributul adresei stivei este
              definit in attr.

       ENOMEM (pthread_setattr_default_np()) Memorie insuficienta.

ATRIBUTE
       Pentru o explica<?>ie a termenilor folosi<?>i in aceasta sec<?>iune, a
       se vedea attributes(7).

       +--------------------------------------+---------------------+---------+
       |Interfa<?>a                           | Atribut             | Valoare |
       +--------------------------------------+---------------------+---------+
       |pthread_getattr_default_np(),         | Siguran<?>a firelor | MT-Safe |
       |pthread_setattr_default_np()          |                     |         |
       +--------------------------------------+---------------------+---------+
STANDARDE
       GNU; de aici <?>i sufixul ,,_np" (neportabil) din numele acestora.

ISTORIC
       glibc 2.18.

EXEMPLE
       Programul de mai jos utilizeaza pthread_getattr_default_np() pentru a
       ob<?>ine atributele implicite de creare a firelor <?>i apoi afi<?>eaza
       diverse configurari din obiectul returnat al atributelor firelor. La
       rularea programului, vedem urmatoarea ie<?>ire:

           $ ./a.out
           Stack size:          8388608
           Guard size:          4096
           Scheduling policy:   SCHED_OTHER
           Scheduling priority: 0
           Detach state:        JOINABLE
           Inherit scheduler:   INHERIT

   Sursa programului
       #define _GNU_SOURCE
       #include <err.h>
       #include <errno.h>
       #include <pthread.h>
       #include <stdio.h>
       #include <stdlib.h>

       static void
       display_pthread_attr(pthread_attr_t *attr)
       {
           int s;
           size_t stacksize;
           size_t guardsize;
           int policy;
           struct sched_param schedparam;
           int detachstate;
           int inheritsched;

           s = pthread_attr_getstacksize(attr, &stacksize);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getstacksize");
           printf("Stack size:          %zu\n", stacksize);

           s = pthread_attr_getguardsize(attr, &guardsize);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getguardsize");
           printf("Guard size:          %zu\n", guardsize);

           s = pthread_attr_getschedpolicy(attr, &policy);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getschedpolicy");
           printf("Scheduling policy:   %s\n",
                  (policy == SCHED_FIFO) ? "SCHED_FIFO" :
                  (policy == SCHED_RR) ? "SCHED_RR" :
                  (policy == SCHED_OTHER) ? "SCHED_OTHER" : "[unknown]");

           s = pthread_attr_getschedparam(attr, &schedparam);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getschedparam");
           printf("Scheduling priority: %d\n", schedparam.sched_priority);

           s = pthread_attr_getdetachstate(attr, &detachstate);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getdetachstate");
           printf("Detach state:        %s\n",
                  (detachstate == PTHREAD_CREATE_DETACHED) ? "DETACHED" :
                  (detachstate == PTHREAD_CREATE_JOINABLE) ? "JOINABLE" :
                  "???");

           s = pthread_attr_getinheritsched(attr, &inheritsched);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_attr_getinheritsched");
           printf("Inherit scheduler:   %s\n",
                  (inheritsched == PTHREAD_INHERIT_SCHED) ? "INHERIT" :
                  (inheritsched == PTHREAD_EXPLICIT_SCHED) ? "EXPLICIT" :
                  "???");
       }

       int
       main(void)
       {
           int s;
           pthread_attr_t attr;

           s = pthread_getattr_default_np(&attr);
           if (s != 0)
               errc(EXIT_FAILURE, s, "pthread_getattr_default_np");

           display_pthread_attr(&attr);

           exit(EXIT_SUCCESS);
       }

CONSULTA<?>I <?>I
       pthread_attr_getaffinity_np(3), pthread_attr_getdetachstate(3),
       pthread_attr_getguardsize(3), pthread_attr_getinheritsched(3),
       pthread_attr_getschedparam(3), pthread_attr_getschedpolicy(3),
       pthread_attr_getscope(3), pthread_attr_getstack(3),
       pthread_attr_getstackaddr(3), pthread_attr_getstacksize(3),
       pthread_attr_init(3), pthread_create(3), pthreads(7)

TRADUCERE
       Traducerea in limba romana a acestui manual a fost facuta de Remus-
       Gabriel Chelu <remusgabriel.chelu@disroot.org>

       Aceasta traducere este documenta<?>ie gratuita; citi<?>i Licen<?>a
       publica generala GNU Versiunea 3
       <https://www.gnu.org/licenses/gpl-3.0.html> sau o versiune ulterioara
       cu privire la condi<?>ii privind drepturile de autor.  NU se asuma
       NICIO RESPONSABILITATE.

       Daca gasi<?>i erori in traducerea acestui manual, va rugam sa
       trimite<?>i un e-mail la <translation-team-ro@lists.sourceforge.net>.

Pagini de manual de Linux 6.9.1  15 iunie 2024   pthread_getattr_default_np(3)