v29.4-roots.1 · Commit 2: [PATCH 02/13] runtime: preserve shared operator controls
src/util/ioprio.h
Before: /dev/null · After: src/util/ioprio.h
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src/util/ioprio.h
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// Copyright (c) 2016 Satoshi Nakamoto
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_UTIL_IOPRIO_H
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#define BITCOIN_UTIL_IOPRIO_H
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#include <bitcoin-build-config.h> // IWYU pragma: keep
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#include <logging.h>
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#if HAVE_IOPRIO_SYSCALL || HAVE_IOPOLICY
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int ioprio_get();
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int ioprio_set(int ioprio);
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int ioprio_set_idle();
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class ioprio_idler {
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private:
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int orig;
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public:
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ioprio_idler(const bool lowprio) {
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if (!lowprio) {
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orig = -1;
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return;
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}
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orig = ioprio_get();
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if (orig == -1) {
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return;
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}
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if (ioprio_set_idle() == -1) {
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orig = -1;
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}
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}
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~ioprio_idler() {
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if (orig == -1) {
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return;
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}
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if (ioprio_set(orig) == -1) {
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LogPrintf("failed to restore ioprio\n");
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}
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}
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};
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#define IOPRIO_IDLER(lowprio) ioprio_idler ioprio_idler_(lowprio)
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#else
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#define ioprio_get() ((void)-1)
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#define ioprio_set(ioprio) ((void)-1)
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#define ioprio_set_idle() ((void)-1)
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#define IOPRIO_IDLER(lowprio) (void)lowprio;
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#endif
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#if HAVE_WINDOWS_IOPRIO
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bool ioprio_set_file_idle(FILE *);
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#else
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#define ioprio_set_file_idle(f) ((void)false)
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#endif
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#endif // BITCOIN_UTIL_IOPRIO_H
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