projects / mirror_zfs.git / blame
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|---|---|---|
| a26baf28 BB |
1 | /* |
| 2 | * CDDL HEADER START | |
| 3 | * | |
| 4 | * The contents of this file are subject to the terms of the | |
| 5 | * Common Development and Distribution License (the "License"). | |
| 6 | * You may not use this file except in compliance with the License. | |
| 7 | * | |
| 8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 | * or http://www.opensolaris.org/os/licensing. | |
| 10 | * See the License for the specific language governing permissions | |
| 11 | * and limitations under the License. | |
| 12 | * | |
| 13 | * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 | * If applicable, add the following below this CDDL HEADER, with the | |
| 16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 | * | |
| 19 | * CDDL HEADER END | |
| 20 | */ | |
| 21 | /* | |
| 22 | * This header file distributed under the terms of the CDDL. | |
| 23 | * Portions Copyright 2008 Sun Microsystems, Inc. All Rights reserved. | |
| 24 | */ | |
| 25 | #ifndef _SYS_STACK_H | |
| 26 | #define _SYS_STACK_H | |
| 27 | ||
| 28 | #include <pthread.h> | |
| 29 | ||
| 30 | #define STACK_BIAS 0 | |
| 31 | ||
| 32 | #ifdef __USE_GNU | |
| 33 | ||
| 34 | static inline int | |
| 35 | stack_getbounds(stack_t *sp) | |
| 36 | { | |
| 37 | pthread_attr_t attr; | |
| 38 | int rc; | |
| 39 | ||
| 40 | rc = pthread_getattr_np(pthread_self(), &attr); | |
| 41 | if (rc) | |
| 42 | return rc; | |
| 43 | ||
| 44 | rc = pthread_attr_getstack(&attr, &sp->ss_sp, &sp->ss_size); | |
| 45 | if (rc == 0) | |
| 46 | sp->ss_flags = 0; | |
| 47 | ||
| 48 | pthread_attr_destroy(&attr); | |
| 49 | ||
| 50 | return rc; | |
| 51 | } | |
| 52 | ||
| 53 | static inline int | |
| 54 | thr_stksegment(stack_t *sp) | |
| 55 | { | |
| 56 | int rc; | |
| 57 | ||
| 58 | rc = stack_getbounds(sp); | |
| 59 | if (rc) | |
| 60 | return rc; | |
| 61 | ||
| 62 | /* thr_stksegment() is expected to set sp.ss_sp to the high stack | |
| 63 | * address, but the stack_getbounds() interface is expected to | |
| 64 | * set sp.ss_sp to the low address. Adjust accordingly. */ | |
| 65 | sp->ss_sp = (void *)(((uintptr_t)sp->ss_sp) + sp->ss_size); | |
| 66 | sp->ss_flags = 0; | |
| 67 | ||
| 68 | return rc; | |
| 69 | } | |
| 70 | ||
| 71 | #endif /* __USE_GNU */ | |
| 72 | #endif /* _SYS_STACK_H */ |