intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 30 insertions, 0 deletions

diff --git a/util/system/madvise.h b/util/system/madvise.h
new file mode 100644
index 0000000000..606733152e
--- /dev/null
+++ b/util/system/madvise.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include "defaults.h"
+
+#include <util/generic/array_ref.h>
+
+/// see linux madvise(MADV_SEQUENTIAL)
+void MadviseSequentialAccess(const void* begin, size_t size);
+void MadviseSequentialAccess(TArrayRef<const char> data);
+void MadviseSequentialAccess(TArrayRef<const ui8> data);
+
+/// see linux madvise(MADV_RANDOM)
+void MadviseRandomAccess(const void* begin, size_t size);
+void MadviseRandomAccess(TArrayRef<const char> data);
+void MadviseRandomAccess(TArrayRef<const ui8> data);
+
+/// see linux madvise(MADV_DONTNEED)
+void MadviseEvict(const void* begin, size_t size);
+void MadviseEvict(TArrayRef<const char> data);
+void MadviseEvict(TArrayRef<const ui8> data);
+
+/// see linux madvise(MADV_DONTDUMP)
+void MadviseExcludeFromCoreDump(const void* begin, size_t size);
+void MadviseExcludeFromCoreDump(TArrayRef<const char> data);
+void MadviseExcludeFromCoreDump(TArrayRef<const ui8> data);
+
+/// see linux madvise(MADV_DODUMP)
+void MadviseIncludeIntoCoreDump(const void* begin, size_t size);
+void MadviseIncludeIntoCoreDump(TArrayRef<const char> data);
+void MadviseIncludeIntoCoreDump(TArrayRef<const ui8> data);