/* $OpenBSD: rthread_attr.c,v 1.23 2017/09/05 02:40:54 guenther Exp $ */ /* * Copyright (c) 2004,2005 Ted Unangst * All Rights Reserved. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * generic attribute support */ #include #include #include #include #include #include #include "rthread.h" /* * Note: stack_size + guard_size == total stack used * * pthread_attr_init MUST be called before any other attribute function * for proper operation. * * Every call to pthread_attr_init MUST be matched with a call to * pthread_attr_destroy to avoid leaking memory. This is an implementation * requirement, not a POSIX requirement. */ int pthread_attr_init(pthread_attr_t *attrp) { pthread_attr_t attr; /* make sure _rthread_attr_default has been initialized */ if (!_threads_ready) _rthread_init(); attr = calloc(1, sizeof(*attr)); if (!attr) return (errno); *attr = _rthread_attr_default; *attrp = attr; return (0); } int pthread_attr_destroy(pthread_attr_t *attrp) { free(*attrp); *attrp = NULL; return (0); } int pthread_attr_getguardsize(const pthread_attr_t *attrp, size_t *guardsize) { *guardsize = (*attrp)->guard_size; return (0); } int pthread_attr_setguardsize(pthread_attr_t *attrp, size_t guardsize) { (*attrp)->guard_size = guardsize; return (0); } int pthread_attr_getdetachstate(const pthread_attr_t *attrp, int *detachstate) { *detachstate = (*attrp)->detach_state; return (0); } int pthread_attr_setdetachstate(pthread_attr_t *attrp, int detachstate) { int error; error = (detachstate == PTHREAD_CREATE_DETACHED || detachstate == PTHREAD_CREATE_JOINABLE) ? 0 : EINVAL; if (error == 0) (*attrp)->detach_state = detachstate; return (error); } int pthread_attr_getstack(const pthread_attr_t *attrp, void **stackaddr, size_t *stacksize) { *stackaddr = (*attrp)->stack_addr; *stacksize = (*attrp)->stack_size; return (0); } int pthread_attr_setstack(pthread_attr_t *attrp, void *stackaddr, size_t stacksize) { int error; /* * XXX Add an alignment test, on stackaddr for stack-grows-up * archs or on stackaddr+stacksize for stack-grows-down archs */ if (stacksize < PTHREAD_STACK_MIN) return (EINVAL); if ((error = pthread_attr_setstackaddr(attrp, stackaddr))) return (error); (*attrp)->stack_size = stacksize; return (0); } int pthread_attr_getstacksize(const pthread_attr_t *attrp, size_t *stacksize) { *stacksize = (*attrp)->stack_size; return (0); } int pthread_attr_setstacksize(pthread_attr_t *attrp, size_t stacksize) { if (!_threads_ready) /* for ROUND_TO_PAGE */ _rthread_init(); if (stacksize < PTHREAD_STACK_MIN || stacksize > ROUND_TO_PAGE(stacksize)) return (EINVAL); (*attrp)->stack_size = stacksize; return (0); } int pthread_attr_getstackaddr(const pthread_attr_t *attrp, void **stackaddr) { *stackaddr = (*attrp)->stack_addr; return (0); } int pthread_attr_setstackaddr(pthread_attr_t *attrp, void *stackaddr) { if (!_threads_ready) _rthread_init(); /* for _thread_pagesize */ if (stackaddr == NULL || (uintptr_t)stackaddr & (_thread_pagesize - 1)) return (EINVAL); (*attrp)->stack_addr = stackaddr; return (0); } DEF_NONSTD(pthread_attr_setstackaddr); int pthread_attr_getscope(const pthread_attr_t *attrp, int *contentionscope) { *contentionscope = (*attrp)->contention_scope; return (0); } int pthread_attr_setscope(pthread_attr_t *attrp, int contentionscope) { if (contentionscope != PTHREAD_SCOPE_SYSTEM && contentionscope != PTHREAD_SCOPE_PROCESS) return (EINVAL); (*attrp)->contention_scope = contentionscope; return (0); }