From 769681a8b9b14d95f719300353a9d07d60e46a08 Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Fri, 12 Dec 2008 12:10:00 -0800 Subject: [PATCH] Trivial umem implementation if portable umem unavailable --- lib/libspl/include/synch.h | 30 +++++++ lib/libspl/include/umem.h | 156 +++++++++++++++++++++++++++++++++++++ 2 files changed, 186 insertions(+) create mode 100644 lib/libspl/include/synch.h create mode 100644 lib/libspl/include/umem.h diff --git a/lib/libspl/include/synch.h b/lib/libspl/include/synch.h new file mode 100644 index 0000000000..afddcfd2ba --- /dev/null +++ b/lib/libspl/include/synch.h @@ -0,0 +1,30 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SOL_SYNCH_H +#define _SOL_SYNCH_H + +#endif diff --git a/lib/libspl/include/umem.h b/lib/libspl/include/umem.h new file mode 100644 index 0000000000..871b0d6182 --- /dev/null +++ b/lib/libspl/include/umem.h @@ -0,0 +1,156 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SOL_UMEM_H +#define _SOL_UMEM_H + +/* XXX: We should use the real portable umem library if it is detected + * at configure time. However, if the library is not available we can + * use a trivial malloc based implementation. This obviously impacts + * performance but unless you using a full userspace build of zpool for + * something other than ztest your likely not going to notice or care. + * + * https://labs.omniti.com/trac/portableumem + */ + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#define UMEM_DEFAULT 0x0000 /* normal -- may fail */ +#define UMEM_NOFAIL 0x0100 /* Never fails */ + +#define UMEM_CACHE_NAMELEN 31 + +typedef int umem_nofail_callback_t(void); +typedef int umem_constructor_t(void *, void *, int); +typedef void umem_destructor_t(void *, void *); +typedef void umem_reclaim_t(void *); + +typedef struct umem_cache { + char cache_name[UMEM_CACHE_NAMELEN + 1]; + size_t cache_bufsize; + size_t cache_align; + umem_constructor_t *cache_constructor; + umem_destructor_t *cache_destructor; + umem_reclaim_t *cache_reclaim + void *cache_private; + void *cache_arena; + int cache_cflags; +} umem_cache_t; + +static inline void * +umem_alloc(size_t size, int flags) +{ + void *ptr; + + ptr = malloc(size); + while (ptr == NULL && (flags & UMEM_NOFAIL)) + ptr = malloc(size); + + return ptr; +} + +static inline void * +umem_zalloc(size_t size, int flags) +{ + void *ptr; + + ptr = umem_alloc(size, flags); + if (ptr) + memset(ptr, 0, size); + + return ptr; +} + +static inline void +umem_free(void *ptr, size_t size) +{ + free(ptr); +} + +static inline void +umem_nofail_callback(umem_nofail_callback_t *cb) {} + +static inline umem_cache_t * +umem_cache_create(char *name, size_t bufsize, size_t align, + umem_constructor_t *constructor, + umem_destructor_t *destructor, + umem_reclaim_t *reclaim, + void *priv, void *vmp, int cflags) +{ + umem_cache_t *cp; + + cp = umem_alloc(sizeof(umem_cache_t), UMEM_DEFAULT); + if (cp) { + strncpy(cp->cache_name, name, UMEM_CACHE_NAMELEN); + cp->cache_bufsize = bufsize; + cp->cache_align = align; + cp->cache_constructor = constructor; + cp->cache_destructor = destructor; + cp->cache_reclaim = reclaim; + cp->cache_private = priv; + cp->cache_arena = vmp; + cp->cache_cflags = cflags; + } + + return cp; +} + +static inline void +umem_cache_destroy(umem_cache_t *cp) +{ + umem_free(cp, sizeof(umem_cache_t)); +} + +static inline void * +umem_cache_alloc(umem_cache_t *cp, int flags) +{ + void *ptr; + + ptr = umem_alloc(cp->cache_bufsize, flags); + if (ptr && cp->cache_constructor) + cp->cache_constructor(ptr, cp->cache_private, UMEM_DEFAULT); + + return ptr; +} + +static inline void +umem_cache_free(umem_cache_t *cp, void *ptr) +{ + if (cp->cache_destructor) + cp->cache_destructor(ptr, cp->cache_private); + + umem_free(ptr, cp->cache_bufsize); +} + +#ifdef __cplusplus +} +#endif + +#endif