/* $NetBSD: chfs_pool.c,v 1.2 2012/02/28 02:48:39 christos Exp $ */ /*- * Copyright (c) 2010 Department of Software Engineering, * University of Szeged, Hungary * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by the Department of Software Engineering, University of Szeged, Hungary * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Pool allocator and convenience routines for chfs. */ #include #include #include #include #include #include "chfs.h" //#include /* --------------------------------------------------------------------- */ void * chfs_pool_page_alloc(struct pool *, int); void chfs_pool_page_free(struct pool *, void *); /* --------------------------------------------------------------------- */ struct pool_allocator chfs_pool_allocator = { .pa_alloc = chfs_pool_page_alloc, .pa_free = chfs_pool_page_free, }; /* --------------------------------------------------------------------- */ void chfs_pool_init(struct chfs_pool *chpp, size_t size, const char *what, struct chfs_mount *chmp) { int cnt; cnt = snprintf(chpp->chp_name, sizeof(chpp->chp_name), "%s_chfs_%p", what, chmp); KASSERT(cnt < sizeof(chpp->chp_name)); pool_init(&chpp->chp_pool, size, 0, 0, 0, chpp->chp_name, &chfs_pool_allocator, IPL_NONE); chpp->chp_mount = chmp; } /* --------------------------------------------------------------------- */ void chfs_pool_destroy(struct chfs_pool *chpp) { pool_destroy((struct pool *)chpp); } /* --------------------------------------------------------------------- */ void * chfs_pool_page_alloc(struct pool *pp, int flags) { struct chfs_pool *chpp; struct chfs_mount *chmp; unsigned int pages; void *page; dbg("CHFS: pool_page_alloc()\n"); chpp = (struct chfs_pool *)pp; chmp = chpp->chp_mount; pages = atomic_inc_uint_nv(&chmp->chm_pages_used); if (pages >= CHFS_PAGES_MAX(chmp)) { atomic_dec_uint(&chmp->chm_pages_used); return NULL; } page = pool_get(pp, flags | PR_WAITOK); if (page == NULL) { atomic_dec_uint(&chmp->chm_pages_used); } return page; } /* --------------------------------------------------------------------- */ void chfs_pool_page_free(struct pool *pp, void *v) { struct chfs_pool *chpp; struct chfs_mount *chmp; dbg("CHFS: pool_page_free()\n"); chpp = (struct chfs_pool *)pp; chmp = chpp->chp_mount; atomic_dec_uint(&chmp->chm_pages_used); pool_put(pp,v); } /* --------------------------------------------------------------------- */ void chfs_str_pool_init(struct chfs_str_pool *chsp, struct chfs_mount *chmp) { dbg("CHFS: str_pool_init()\n"); chfs_pool_init(&chsp->chsp_pool_16, 16, "str", chmp); chfs_pool_init(&chsp->chsp_pool_32, 32, "str", chmp); chfs_pool_init(&chsp->chsp_pool_64, 64, "str", chmp); chfs_pool_init(&chsp->chsp_pool_128, 128, "str", chmp); chfs_pool_init(&chsp->chsp_pool_256, 256, "str", chmp); chfs_pool_init(&chsp->chsp_pool_512, 512, "str", chmp); chfs_pool_init(&chsp->chsp_pool_1024, 1024, "str", chmp); } /* --------------------------------------------------------------------- */ void chfs_str_pool_destroy(struct chfs_str_pool *chsp) { dbg("CHFS: str_pool_destroy()\n"); chfs_pool_destroy(&chsp->chsp_pool_16); chfs_pool_destroy(&chsp->chsp_pool_32); chfs_pool_destroy(&chsp->chsp_pool_64); chfs_pool_destroy(&chsp->chsp_pool_128); chfs_pool_destroy(&chsp->chsp_pool_256); chfs_pool_destroy(&chsp->chsp_pool_512); chfs_pool_destroy(&chsp->chsp_pool_1024); } /* --------------------------------------------------------------------- */ char * chfs_str_pool_get(struct chfs_str_pool *chsp, size_t len, int flags) { struct chfs_pool *p; dbg("CHFS: str_pool_get()\n"); KASSERT(len <= 1024); if (len <= 16) p = &chsp->chsp_pool_16; else if (len <= 32) p = &chsp->chsp_pool_32; else if (len <= 64) p = &chsp->chsp_pool_64; else if (len <= 128) p = &chsp->chsp_pool_128; else if (len <= 256) p = &chsp->chsp_pool_256; else if (len <= 512) p = &chsp->chsp_pool_512; else if (len <= 1024) p = &chsp->chsp_pool_1024; else { KASSERT(0); p = NULL; /* Silence compiler warnings */ } return (char *)CHFS_POOL_GET(p, flags); } /* --------------------------------------------------------------------- */ void chfs_str_pool_put(struct chfs_str_pool *chsp, char *str, size_t len) { struct chfs_pool *p; dbg("CHFS: str_pool_put()\n"); KASSERT(len <= 1024); if (len <= 16) p = &chsp->chsp_pool_16; else if (len <= 32) p = &chsp->chsp_pool_32; else if (len <= 64) p = &chsp->chsp_pool_64; else if (len <= 128) p = &chsp->chsp_pool_128; else if (len <= 256) p = &chsp->chsp_pool_256; else if (len <= 512) p = &chsp->chsp_pool_512; else if (len <= 1024) p = &chsp->chsp_pool_1024; else { KASSERT(0); p = NULL; /* Silence compiler warnings */ } CHFS_POOL_PUT(p, str); }