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26 .Dt PTHREAD_ATTR_GET_NP 3
29 .Nm pthread_attr_get_np
30 .Nd get attributes of existent thread
36 .Fn pthread_attr_get_np "pthread_t pid" "pthread_attr_t *dst"
39 .Fn pthread_attr_get_np
40 function is used to get existent thread's attributes.
43 structure are exact values of attributes provided at thread creation
46 function), except for the stack address.
50 is supposed to be used in conjunction with
52 functions to retrieve individual values from
57 should point to allocated memory area big enough to fit this structure.
59 It is HIGHLY RECOMMENDED to use
60 .Xr pthread_attr_init 3
61 function to allocate attribute storage.
62 .Sh IMPLEMENTATION NOTES
64 .Fn pthread_attr_get_np
65 function will always return a pointer to the thread's real stack address,
66 regardless of its value in the original attributes structure.
69 .Fn pthread_attr_get_np
71 Otherwise, an error number is returned to indicate the error.
75 my_thread_stack_size(pthread_t pid)
80 pthread_attr_init(&attr);
81 pthread_attr_get_np(pid, &attr);
82 pthread_attr_getstacksize(&attr, &size);
83 pthread_attr_destroy(&attr);
89 .Fn pthread_attr_get_np
90 function will fail if:
93 Invalid value for one of given parameters.
95 No thread could be found corresponding to that specified by the given
99 .Xr pthread_attr_destroy 3 ,
100 .Xr pthread_attr_getdetachstate 3 ,
101 .Xr pthread_attr_getinheritsched 3 ,
102 .Xr pthread_attr_getschedparam 3 ,
103 .Xr pthread_attr_getschedpolicy 3 ,
104 .Xr pthread_attr_getscope 3 ,
105 .Xr pthread_attr_getstack 3 ,
106 .Xr pthread_attr_getstackaddr 3 ,
107 .Xr pthread_attr_getstacksize 3 ,
108 .Xr pthread_attr_init 3 ,
112 .Fn pthread_attr_get_np
113 function and this manual page were written by
114 .An Alexey Zelkin Aq Mt phantom@FreeBSD.org .