mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-26 03:58:15 +00:00
58bd26b6cf
This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <stdbool.h>
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#include <stddef.h>
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#include <isc/atomic.h>
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#include <isc/counter.h>
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#include <isc/magic.h>
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#include <isc/mem.h>
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#include <isc/refcount.h>
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#include <isc/util.h>
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#define COUNTER_MAGIC ISC_MAGIC('C', 'n', 't', 'r')
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#define VALID_COUNTER(r) ISC_MAGIC_VALID(r, COUNTER_MAGIC)
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struct isc_counter {
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unsigned int magic;
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isc_mem_t *mctx;
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isc_refcount_t references;
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atomic_uint_fast32_t limit;
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atomic_uint_fast32_t used;
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};
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isc_result_t
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isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp) {
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isc_counter_t *counter;
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REQUIRE(counterp != NULL && *counterp == NULL);
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counter = isc_mem_get(mctx, sizeof(*counter));
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counter->mctx = NULL;
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isc_mem_attach(mctx, &counter->mctx);
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isc_refcount_init(&counter->references, 1);
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atomic_init(&counter->limit, limit);
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atomic_init(&counter->used, 0);
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counter->magic = COUNTER_MAGIC;
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*counterp = counter;
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return (ISC_R_SUCCESS);
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}
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isc_result_t
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isc_counter_increment(isc_counter_t *counter) {
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uint32_t used = atomic_fetch_add_relaxed(&counter->used, 1) + 1;
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uint32_t limit = atomic_load_acquire(&counter->limit);
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if (limit != 0 && used >= limit) {
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return (ISC_R_QUOTA);
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}
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return (ISC_R_SUCCESS);
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}
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unsigned int
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isc_counter_used(isc_counter_t *counter) {
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REQUIRE(VALID_COUNTER(counter));
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return (atomic_load_acquire(&counter->used));
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}
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void
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isc_counter_setlimit(isc_counter_t *counter, int limit) {
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REQUIRE(VALID_COUNTER(counter));
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atomic_store(&counter->limit, limit);
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}
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void
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isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp) {
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REQUIRE(VALID_COUNTER(source));
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REQUIRE(targetp != NULL && *targetp == NULL);
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isc_refcount_increment(&source->references);
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*targetp = source;
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}
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static void
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destroy(isc_counter_t *counter) {
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isc_refcount_destroy(&counter->references);
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counter->magic = 0;
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isc_mem_putanddetach(&counter->mctx, counter, sizeof(*counter));
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}
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void
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isc_counter_detach(isc_counter_t **counterp) {
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isc_counter_t *counter;
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REQUIRE(counterp != NULL && *counterp != NULL);
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counter = *counterp;
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*counterp = NULL;
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REQUIRE(VALID_COUNTER(counter));
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if (isc_refcount_decrement(&counter->references) == 1) {
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destroy(counter);
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}
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}
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