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6eb1340d1b
Previously, the async job queue would use a locked-list (ISC_LIST). With introduction of atomic stack (that has to be drained at once), we could use it to remove some contention between the threads and simplify the async queue. Fortunately, the reverse order still works for us - instead of append and tail/prev operation on the list, we are now using prepend and head/next operation on the atomic stack.
61 lines
1.5 KiB
C
61 lines
1.5 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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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <isc/async.h>
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#include <isc/atomic.h>
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#include <isc/barrier.h>
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#include <isc/condition.h>
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#include <isc/job.h>
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#include <isc/loop.h>
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#include <isc/magic.h>
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#include <isc/mem.h>
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#include <isc/mutex.h>
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#include <isc/refcount.h>
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#include <isc/result.h>
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#include <isc/signal.h>
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#include <isc/stack.h>
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#include <isc/strerr.h>
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#include <isc/thread.h>
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#include <isc/util.h>
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#include <isc/uv.h>
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#include <isc/work.h>
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#include "job_p.h"
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#include "loop_p.h"
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void
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isc_async_run(isc_loop_t *loop, isc_job_cb cb, void *cbarg) {
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int r;
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isc_job_t *job = NULL;
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REQUIRE(VALID_LOOP(loop));
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REQUIRE(cb != NULL);
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job = isc__job_new(loop, cb, cbarg);
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/*
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* Now send the half-initialized job to the loop queue.
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*
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* The ISC_ASTACK_PUSH is counterintuitive here, but uv_idle
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* drains its queue backwards, so if there's more than one event
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* to be processed then they need to be in reverse order.
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*/
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ISC_ASTACK_PUSH(loop->queue_jobs, job, link);
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r = uv_async_send(&loop->queue_trigger);
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UV_RUNTIME_CHECK(uv_async_send, r);
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}
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