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https://gitlab.isc.org/isc-projects/bind9
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2463e5232d
As it was pointed out, the alignas() can't be used on objects larger than `max_align_t` otherwise the compiler might miscompile the code to use auto-vectorization on unaligned memory. As we were only using alignas() as a way to prevent false memory sharing, we can use manual padding in the affected structures.
44 lines
1.2 KiB
C
44 lines
1.2 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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#pragma once
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#include <isc/job.h>
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#include <isc/loop.h>
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#include <isc/os.h>
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#include <isc/uv.h>
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/*%
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* NOTE: We are using struct __cds_wfcq_head that doesn't have an internal
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* mutex, because we are only using enqueue and splice, and those don't need
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* any synchronization (see urcu/wfcqueue.h for detailed description).
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*/
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STATIC_ASSERT(ISC_OS_CACHELINE_SIZE >= sizeof(struct __cds_wfcq_head),
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"ISC_OS_CACHELINE_SIZE smaller than "
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"sizeof(struct __cds_wfcq_head)");
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typedef struct isc_jobqueue {
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struct __cds_wfcq_head head;
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uint8_t __padding[ISC_OS_CACHELINE_SIZE -
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sizeof(struct __cds_wfcq_head)];
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struct cds_wfcq_tail tail;
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} isc_jobqueue_t;
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typedef ISC_LIST(isc_job_t) isc_joblist_t;
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void
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isc__job_cb(uv_idle_t *handle);
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void
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isc__job_close(uv_handle_t *handle);
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