PTHREAD_ATTR_GET_NP(3) | FreeBSD Library Functions Manual | PTHREAD_ATTR_GET_NP(3) |
NAME
pthread_attr_get_np — get attributes of existent threadLIBRARY
POSIX Threads Library (libpthread, -lpthread)DESCRIPTION
The pthread_attr_get_np() function is used to get existent thread's attributes. Most fields of pthread_attr_t structure are exact values of attributes provided at thread creation time (as parameter to pthread_create(3) function), except for the stack address.Value returned as dst is supposed to be used in conjunction with pthread_attr_get*() functions to retrieve individual values from pthread_attr_t structure. Parameter dst should point to allocated memory area big enough to fit this structure.
It is HIGHLY RECOMMENDED to use pthread_attr_init(3) function to allocate attribute storage.
IMPLEMENTATION NOTES
The pthread_attr_get_np() function will always return a pointer to the thread's real stack address, regardless of its value in the original attributes structure.RETURN VALUES
If successful, pthread_attr_get_np() function returns 0. Otherwise, an error number is returned to indicate the error.EXAMPLES
size_t my_thread_stack_size(pthread_t pid) { pthread_attr_t attr; size_t size; pthread_attr_init(&attr); pthread_attr_get_np(pid, &attr); pthread_attr_getstacksize(&attr, &size); pthread_attr_destroy(&attr); return(size); }
ERRORS
The pthread_attr_get_np() function will fail if:- [ EINVAL]
- Invalid value for one of given parameters.
- [ ESRC]
- No thread could be found corresponding to that specified by the given thread ID.
SEE ALSO
pthread_attr_destroy(3), pthread_attr_getdetachstate(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)AUTHORS
The pthread_attr_get_np() function and this manual page were written by <phantom@FreeBSD.org>.January 31, 2003 | FreeBSD |