pthread_getattr_default_np(3) - wariua/manpages-ko GitHub Wiki

#define _GNU_SOURCE             /* feature_test_macros(7) 참고 */
#include <pthread.h>

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

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

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

#define errExitEN(en, msg) \
                        do { errno = en; perror(msg); \
                             exit(EXIT_FAILURE); } while (0)

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)
        errExitEN(s, "pthread_attr_getstacksize");
    printf("Stack size:          %zd\n", stacksize);

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

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

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

int
main(int argc, char *argv[])
{
    int s;
    pthread_attr_t attr;

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

    display_pthread_attr(&attr);

    exit(EXIT_SUCCESS);
}