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7b1d985de2
The isc_async API was using lock-free stack (where enqueue operation was not wait-free). Change the isc_async to use cds_wfcqueue internally - enqueue and splice (move the queue members from one list to another) is nonblocking and wait-free.
38 lines
1 KiB
C
38 lines
1 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/align.h>
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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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typedef struct isc_jobqueue {
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alignas(ISC_OS_CACHELINE_SIZE) struct __cds_wfcq_head head;
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alignas(ISC_OS_CACHELINE_SIZE) 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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