diff options
Diffstat (limited to 'cddl/contrib/opensolaris/lib/libdtrace/common/dt_inttab.c')
-rw-r--r-- | cddl/contrib/opensolaris/lib/libdtrace/common/dt_inttab.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_inttab.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_inttab.c new file mode 100644 index 0000000..a6ac589 --- /dev/null +++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_inttab.c @@ -0,0 +1,115 @@ +/* + * 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 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <assert.h> + +#include <dt_inttab.h> +#include <dt_impl.h> + +dt_inttab_t * +dt_inttab_create(dtrace_hdl_t *dtp) +{ + uint_t len = _dtrace_intbuckets; + dt_inttab_t *ip; + + assert((len & (len - 1)) == 0); + + if ((ip = dt_zalloc(dtp, sizeof (dt_inttab_t))) == NULL || + (ip->int_hash = dt_zalloc(dtp, sizeof (void *) * len)) == NULL) { + dt_free(dtp, ip); + return (NULL); + } + + ip->int_hdl = dtp; + ip->int_hashlen = len; + + return (ip); +} + +void +dt_inttab_destroy(dt_inttab_t *ip) +{ + dt_inthash_t *hp, *np; + + for (hp = ip->int_head; hp != NULL; hp = np) { + np = hp->inh_next; + dt_free(ip->int_hdl, hp); + } + + dt_free(ip->int_hdl, ip->int_hash); + dt_free(ip->int_hdl, ip); +} + +int +dt_inttab_insert(dt_inttab_t *ip, uint64_t value, uint_t flags) +{ + uint_t h = value & (ip->int_hashlen - 1); + dt_inthash_t *hp; + + if (flags & DT_INT_SHARED) { + for (hp = ip->int_hash[h]; hp != NULL; hp = hp->inh_hash) { + if (hp->inh_value == value && hp->inh_flags == flags) + return (hp->inh_index); + } + } + + if ((hp = dt_alloc(ip->int_hdl, sizeof (dt_inthash_t))) == NULL) + return (-1); + + hp->inh_hash = ip->int_hash[h]; + hp->inh_next = NULL; + hp->inh_value = value; + hp->inh_index = ip->int_index++; + hp->inh_flags = flags; + + ip->int_hash[h] = hp; + ip->int_nelems++; + + if (ip->int_head == NULL) + ip->int_head = hp; + else + ip->int_tail->inh_next = hp; + + ip->int_tail = hp; + return (hp->inh_index); +} + +uint_t +dt_inttab_size(const dt_inttab_t *ip) +{ + return (ip->int_nelems); +} + +void +dt_inttab_write(const dt_inttab_t *ip, uint64_t *dst) +{ + const dt_inthash_t *hp; + + for (hp = ip->int_head; hp != NULL; hp = hp->inh_next) + *dst++ = hp->inh_value; +} |