pthread_attr_t Thread Properties (ii)

A. Function:

1. Initialization and destruction of thread properties:
#include <pthread.h>
int Pthread_attr_init (pthread_attr_t *attr);
int Pthread_attr_destroy (pthread_attr_t *attr);
Both return:0 if OK, error number on failure
2. Set thread Properties--detackstate (Detach State):
#include <pthread.h>
int pthread_attr_getdetachstate (const pthread_attr_t *restrict attr, int *detachstate);
int Pthread_attr_setdetachstate (pthread_attr_t *attr, int detachstate);
Both return:0 if OK, error number on failure
Detachstate has two options: pthread_create_detached detach state to start thread
pthread_create_joinable normal state start thread
3. Set thread properties--stackaddr (lowest address of line stacks), stacksize (size of line stacks):
#include <pthread.h>
int Pthread_attr_getstack (const pthread_attr_t *restrict attr,
void **restrict Stackaddr,
size_t *restrict stacksize);
int Pthread_attr_setstack (const pthread_attr_t *attr,
void *stackaddr,
size_t *stacksize);
Both return:0 if OK, error number on failure
4. Set thread properties--stacksize (size of line stacks):
#include <pthread.h>
int pthread_attr_getstacksize (const pthread_attr_t *restrict attr,
size_t *restrict stacksize);
int Pthread_attr_setstacksize (pthread_attr_t *attr,
size_t stacksize);
Both return:0 if OK, error number on failure
5. Set thread properties--guardsize (alert buffer size at the end of the thread stack)
#include <pthread.h>
int pthread_attr_getguardsize (const pthread_attr_t *restrict attr,
size_t *restrict guardsize);
int Pthread_attr_setguardsize (pthread_attr_t *attr,
size_t guardsize);
Both return:0 if OK, error number on failure
two. Focus:

Three. Example:

Create a thread in detach state

[CPP]View Plaincopy

2. #include <stdio.h>
4. #include <pthread.h>
6. #include <string.h>
10. void * THR_FN ()
12. {
14. printf ("Thread run\n");
16. Pthread_exit ((void *) 0);
18. }
22. int main ()
24. {
26. pthread_t Tid;
28. pthread_attr_t attr;
30. int ret;
34. ret = Pthread_attr_init (&attr);
36. if (ret!=0)
38. printf ("Init attr error:%s\n", Strerror (ret));
40. ret = Pthread_attr_setdetachstate (&attr,pthread_create_detached);
42. if (ret==0)
44. {
46. ret = Pthread_create (&tid,&attr,thr_fn,null);
48. if (ret!=0)
50. printf ("Create thread error:%s\n", strerror (ret));
52. }
54. Pthread_attr_destroy (&ATTR);
56. Sleep (1);
58. return 0;
60. }

Run:
[Email protected]:~/12#./a.out
Thread Run

pthread_attr_t Thread Properties (b)