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