66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
// Copyright 2015 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/threading/platform_thread_internal_posix.h"
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#include <errno.h>
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#include <sys/resource.h>
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#include <ostream>
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#include "base/containers/adapters.h"
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#include "base/logging.h"
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#include "base/notreached.h"
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namespace base {
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namespace internal {
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int ThreadTypeToNiceValue(ThreadType thread_type) {
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for (const auto& pair : kThreadTypeToNiceValueMap) {
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if (pair.thread_type == thread_type)
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return pair.nice_value;
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}
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NOTREACHED() << "Unknown ThreadType";
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return 0;
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}
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ThreadPriorityForTest NiceValueToThreadPriorityForTest(int nice_value) {
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// Try to find a priority that best describes |nice_value|. If there isn't
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// an exact match, this method returns the closest priority whose nice value
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// is higher (lower priority) than |nice_value|.
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for (const auto& pair : kThreadPriorityToNiceValueMapForTest) {
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if (pair.nice_value >= nice_value)
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return pair.priority;
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}
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// Reaching here means |nice_value| is more than any of the defined
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// priorities. The lowest priority is suitable in this case.
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return ThreadPriorityForTest::kBackground;
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}
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int GetCurrentThreadNiceValue() {
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#if BUILDFLAG(IS_NACL)
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NOTIMPLEMENTED();
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return 0;
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#else
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// Need to clear errno before calling getpriority():
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// http://man7.org/linux/man-pages/man2/getpriority.2.html
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errno = 0;
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int nice_value = getpriority(PRIO_PROCESS, 0);
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if (errno != 0) {
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DVPLOG(1) << "Failed to get nice value of thread ("
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<< PlatformThread::CurrentId() << ")";
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return 0;
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}
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return nice_value;
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#endif
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}
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} // namespace internal
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} // namespace base
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