1.\" $OpenBSD: pthread_stackseg_np.3,v 1.3 2004/01/25 14:48:32 jmc Exp $ 2.\" 3.\" PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> 4.\" 5.Dd January 15, 2004 6.Dt PTHREAD_STACKSEG_NP 3 7.Os 8.Sh NAME 9.Nm pthread_stackseg_np 10.Nd return stack size and location 11.Sh SYNOPSIS 12.Fd #include <sys/signal.h> 13.Fd #include <pthread_np.h> 14.Ft int 15.Fn pthread_stackseg_np "stack_t *sinfo" 16.Sh DESCRIPTION 17The 18.Fn pthread_stackseg_np 19function returns information about the current thread's stack. 20A 21.Fa stack_t 22is the same as a 23.Fa struct sigaltstack 24(see 25.Xr sigaltstack 2 ) 26except the 27.Fa ss_sp 28variable points to the top of the stack instead of the base. 29.Sh RETURN VALUES 30If successful, the 31.Fn pthread_stackseg_np 32function will return 0. 33Otherwise an error number will be returned to indicate the error. 34.Sh ERRORS 35The 36.Fn pthread_stackseg_np 37function will fail if: 38.Bl -tag -width Er 39.It Bq Er EAGAIN 40Stack information for the current thread is not currently available. 41There is no guarantee that the current thread's stack information will ever 42become available. 43.El 44.Sh SEE ALSO 45.Xr sigaltstack 2 , 46.Xr pthreads 3 47.Sh STANDARDS 48.Fn pthread_stackseg_np 49is a non-portable extension to 50.St -p1003.1-2001 . 51