accel

package
v0.0.0-...-957f62e Latest Latest
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 Go to latest Published: Nov 10, 2023 License: Apache-2.0, MIT Imports: 26 Imported by: 0

Documentation

Overview

Package accel implements proxying for hardware accelerators.

Index

Constants

View Source 
const (
	// minDegree is the minimum degree of an internal node in a Set B-tree.
	//
	//	- Any non-root node has at least minDegree-1 segments.
	//
	//	- Any non-root internal (non-leaf) node has at least minDegree children.
	//
	//	- The root node may have fewer than minDegree-1 segments, but it may
	// only have 0 segments if the tree is empty.
	//
	// Our implementation requires minDegree >= 3. Higher values of minDegree
	// usually improve performance, but increase memory usage for small sets.
	DevAddrminDegree = 3

	DevAddrmaxDegree = 2 * DevAddrminDegree
)
View Source 
const DevAddrtrackGaps = 0

trackGaps is an optional parameter.

If trackGaps is 1, the Set will track maximum gap size recursively, enabling the GapIterator.{Prev,Next}LargeEnoughGap functions. In this case, Key must be an unsigned integer.

trackGaps must be 0 or 1.

Variables

This section is empty.

Functions

func CreateDevtmpfsFile 

func CreateDevtmpfsFile(ctx context.Context, dev *devtmpfs.Accessor, num uint32) error

CreateDevtmpfsFile creates a /dev/accel[0-9]+ device file.

func DevAddrzeroNodeSlice 

func DevAddrzeroNodeSlice(slice []*DevAddrnode)

func DevAddrzeroValueSlice 

func DevAddrzeroValueSlice(slice []pinnedAccelMem)

func Filters 

func Filters() seccomp.SyscallRules

Filters returns seccomp-bpf filters for this package.

func Register 

func Register(vfsObj *vfs.VirtualFilesystem, minor uint32) error

Register registers all devices implemented by this package in vfsObj.

Types

type DevAddrGapIterator 

type DevAddrGapIterator struct {
	// contains filtered or unexported fields
}

A GapIterator is conceptually one of:

  • A pointer to a position between two segments, before the first segment, or after the last segment in a set, called a *gap*; or

  • A terminal iterator, which is a sentinel indicating that the end of iteration has been reached.

Note that the gap between two adjacent segments exists (iterators to it are non-terminal), but has a length of zero. GapIterator.IsEmpty returns true for such gaps. An empty set contains a single gap, spanning the entire range of the set's keys.

GapIterators are copyable values and are meaningfully equality-comparable. The zero value of GapIterator is a terminal iterator.

Unless otherwise specified, any mutation of a set invalidates all existing iterators into the set.

func (DevAddrGapIterator) End 

func (gap DevAddrGapIterator) End() uint64

End is equivalent to Range().End, but should be preferred if only the end of the range is needed.

func (DevAddrGapIterator) IsEmpty 

func (gap DevAddrGapIterator) IsEmpty() bool

IsEmpty returns true if the iterated gap is empty (that is, the "gap" is between two adjacent segments.)

func (DevAddrGapIterator) NextGap 

func (gap DevAddrGapIterator) NextGap() DevAddrGapIterator

NextGap returns the iterated gap's successor. If no such gap exists, NextGap returns a terminal iterator.

func (DevAddrGapIterator) NextLargeEnoughGap 

func (gap DevAddrGapIterator) NextLargeEnoughGap(minSize uint64) DevAddrGapIterator

NextLargeEnoughGap returns the iterated gap's first next gap with larger length than minSize. If not found, return a terminal gap iterator (does NOT include this gap itself).

Precondition: trackGaps must be 1.

func (DevAddrGapIterator) NextSegment 

func (gap DevAddrGapIterator) NextSegment() DevAddrIterator

NextSegment returns the segment immediately after the iterated gap. If no such segment exists, NextSegment returns a terminal iterator.

func (DevAddrGapIterator) Ok 

func (gap DevAddrGapIterator) Ok() bool

Ok returns true if the iterator is not terminal. All other methods are only valid for non-terminal iterators.

func (DevAddrGapIterator) PrevGap 

func (gap DevAddrGapIterator) PrevGap() DevAddrGapIterator

PrevGap returns the iterated gap's predecessor. If no such gap exists, PrevGap returns a terminal iterator.

func (DevAddrGapIterator) PrevLargeEnoughGap 

func (gap DevAddrGapIterator) PrevLargeEnoughGap(minSize uint64) DevAddrGapIterator

PrevLargeEnoughGap returns the iterated gap's first prev gap with larger or equal length than minSize. If not found, return a terminal gap iterator (does NOT include this gap itself).

Precondition: trackGaps must be 1.

func (DevAddrGapIterator) PrevSegment 

func (gap DevAddrGapIterator) PrevSegment() DevAddrIterator

PrevSegment returns the segment immediately before the iterated gap. If no such segment exists, PrevSegment returns a terminal iterator.

func (DevAddrGapIterator) Range 

func (gap DevAddrGapIterator) Range() DevAddrRange

Range returns the range spanned by the iterated gap.

func (DevAddrGapIterator) Start 

func (gap DevAddrGapIterator) Start() uint64

Start is equivalent to Range().Start, but should be preferred if only the start of the range is needed.

type DevAddrIterator 

type DevAddrIterator struct {
	// contains filtered or unexported fields
}

A Iterator is conceptually one of:

  • A pointer to a segment in a set; or

  • A terminal iterator, which is a sentinel indicating that the end of iteration has been reached.

Iterators are copyable values and are meaningfully equality-comparable. The zero value of Iterator is a terminal iterator.

Unless otherwise specified, any mutation of a set invalidates all existing iterators into the set.

func DevAddrsegmentAfterPosition 

func DevAddrsegmentAfterPosition(n *DevAddrnode, i int) DevAddrIterator

segmentAfterPosition returns the successor segment of the position given by n.children[i], which may or may not contain a child. If no such segment exists, segmentAfterPosition returns a terminal iterator.

func DevAddrsegmentBeforePosition 

func DevAddrsegmentBeforePosition(n *DevAddrnode, i int) DevAddrIterator

segmentBeforePosition returns the predecessor segment of the position given by n.children[i], which may or may not contain a child. If no such segment exists, segmentBeforePosition returns a terminal iterator.

func (DevAddrIterator) End 

func (seg DevAddrIterator) End() uint64

End is equivalent to Range().End, but should be preferred if only the end of the range is needed.

func (DevAddrIterator) NextGap 

func (seg DevAddrIterator) NextGap() DevAddrGapIterator

NextGap returns the gap immediately after the iterated segment.

func (DevAddrIterator) NextNonEmpty 

func (seg DevAddrIterator) NextNonEmpty() (DevAddrIterator, DevAddrGapIterator)

NextNonEmpty returns the iterated segment's successor if it is adjacent, or the gap after the iterated segment otherwise. If seg.End() == Functions.MaxKey(), NextNonEmpty will return two terminal iterators. Otherwise, exactly one of the iterators returned by NextNonEmpty will be non-terminal.

func (DevAddrIterator) NextSegment 

func (seg DevAddrIterator) NextSegment() DevAddrIterator

NextSegment returns the iterated segment's successor. If there is no succeeding segment, NextSegment returns a terminal iterator.

func (DevAddrIterator) Ok 

func (seg DevAddrIterator) Ok() bool

Ok returns true if the iterator is not terminal. All other methods are only valid for non-terminal iterators.

func (DevAddrIterator) PrevGap 

func (seg DevAddrIterator) PrevGap() DevAddrGapIterator

PrevGap returns the gap immediately before the iterated segment.

func (DevAddrIterator) PrevNonEmpty 

func (seg DevAddrIterator) PrevNonEmpty() (DevAddrIterator, DevAddrGapIterator)

PrevNonEmpty returns the iterated segment's predecessor if it is adjacent, or the gap before the iterated segment otherwise. If seg.Start() == Functions.MinKey(), PrevNonEmpty will return two terminal iterators. Otherwise, exactly one of the iterators returned by PrevNonEmpty will be non-terminal.

func (DevAddrIterator) PrevSegment 

func (seg DevAddrIterator) PrevSegment() DevAddrIterator

PrevSegment returns the iterated segment's predecessor. If there is no preceding segment, PrevSegment returns a terminal iterator.

func (DevAddrIterator) Range 

func (seg DevAddrIterator) Range() DevAddrRange

Range returns the iterated segment's range key.

func (DevAddrIterator) SetEnd 

func (seg DevAddrIterator) SetEnd(end uint64)

SetEnd mutates the iterated segment's end. If the new end value would cause the iterated segment to overlap another segment, or would result in an invalid range, SetEnd panics. This operation does not invalidate any iterators.

func (DevAddrIterator) SetEndUnchecked 

func (seg DevAddrIterator) SetEndUnchecked(end uint64)

SetEndUnchecked mutates the iterated segment's end. This operation does not invalidate any iterators.

Preconditions: The new end must be valid:

  • end > seg.Start().
  • If seg.NextSegment().Ok(), then end <= seg.NextSegment().Start().

func (DevAddrIterator) SetRange 

func (seg DevAddrIterator) SetRange(r DevAddrRange)

SetRange mutates the iterated segment's range key. If the new range would cause the iterated segment to overlap another segment, or if the new range is invalid, SetRange panics. This operation does not invalidate any iterators.

func (DevAddrIterator) SetRangeUnchecked 

func (seg DevAddrIterator) SetRangeUnchecked(r DevAddrRange)

SetRangeUnchecked mutates the iterated segment's range key. This operation does not invalidate any iterators.

Preconditions: - r.Length() > 0. - The new range must not overlap an existing one:

  • If seg.NextSegment().Ok(), then r.end <= seg.NextSegment().Start().
  • If seg.PrevSegment().Ok(), then r.start >= seg.PrevSegment().End().

func (DevAddrIterator) SetStart 

func (seg DevAddrIterator) SetStart(start uint64)

SetStart mutates the iterated segment's start. If the new start value would cause the iterated segment to overlap another segment, or would result in an invalid range, SetStart panics. This operation does not invalidate any iterators.

func (DevAddrIterator) SetStartUnchecked 

func (seg DevAddrIterator) SetStartUnchecked(start uint64)

SetStartUnchecked mutates the iterated segment's start. This operation does not invalidate any iterators.

Preconditions: The new start must be valid:

  • start < seg.End()
  • If seg.PrevSegment().Ok(), then start >= seg.PrevSegment().End().

func (DevAddrIterator) SetValue 

func (seg DevAddrIterator) SetValue(val pinnedAccelMem)

SetValue mutates the iterated segment's value. This operation does not invalidate any iterators.

func (DevAddrIterator) Start 

func (seg DevAddrIterator) Start() uint64

Start is equivalent to Range().Start, but should be preferred if only the start of the range is needed.

func (DevAddrIterator) Value 

func (seg DevAddrIterator) Value() pinnedAccelMem

Value returns a copy of the iterated segment's value.

func (DevAddrIterator) ValuePtr 

func (seg DevAddrIterator) ValuePtr() *pinnedAccelMem

ValuePtr returns a pointer to the iterated segment's value. The pointer is invalidated if the iterator is invalidated. This operation does not invalidate any iterators.

type DevAddrRange 

type DevAddrRange struct {
	// Start is the inclusive start of the range.
	Start uint64

	// End is the exclusive end of the range.
	End uint64
}

A Range represents a contiguous range of T.

+stateify savable

func (DevAddrRange) CanSplitAt 

func (r DevAddrRange) CanSplitAt(x uint64) bool

CanSplitAt returns true if it is legal to split a segment spanning the range r at x; that is, splitting at x would produce two ranges, both of which have non-zero length.

func (DevAddrRange) Contains 

func (r DevAddrRange) Contains(x uint64) bool

Contains returns true if r contains x.

func (DevAddrRange) Intersect 

func (r DevAddrRange) Intersect(r2 DevAddrRange) DevAddrRange

Intersect returns a range consisting of the intersection between r and r2. If r and r2 do not overlap, Intersect returns a range with unspecified bounds, but for which Length() == 0.

func (DevAddrRange) IsSupersetOf 

func (r DevAddrRange) IsSupersetOf(r2 DevAddrRange) bool

IsSupersetOf returns true if r is a superset of r2; that is, the range r2 is contained within r.

func (DevAddrRange) Length 

func (r DevAddrRange) Length() uint64

Length returns the length of the range.

func (DevAddrRange) Overlaps 

func (r DevAddrRange) Overlaps(r2 DevAddrRange) bool

Overlaps returns true if r and r2 overlap.

func (*DevAddrRange) StateFields 

func (r *DevAddrRange) StateFields() []string

func (*DevAddrRange) StateLoad 

func (r *DevAddrRange) StateLoad(stateSourceObject state.Source)

+checklocksignore

func (*DevAddrRange) StateSave 

func (r *DevAddrRange) StateSave(stateSinkObject state.Sink)

+checklocksignore

func (*DevAddrRange) StateTypeName 

func (r *DevAddrRange) StateTypeName() string

func (DevAddrRange) WellFormed 

func (r DevAddrRange) WellFormed() bool

WellFormed returns true if r.Start <= r.End. All other methods on a Range require that the Range is well-formed.

type DevAddrSegmentDataSlices 

type DevAddrSegmentDataSlices struct {
	Start  []uint64
	End    []uint64
	Values []pinnedAccelMem
}

SegmentDataSlices represents segments from a set as slices of start, end, and values. SegmentDataSlices is primarily used as an intermediate representation for save/restore and the layout here is optimized for that.

+stateify savable

func (*DevAddrSegmentDataSlices) StateFields 

func (d *DevAddrSegmentDataSlices) StateFields() []string

func (*DevAddrSegmentDataSlices) StateLoad 

func (d *DevAddrSegmentDataSlices) StateLoad(stateSourceObject state.Source)

+checklocksignore

func (*DevAddrSegmentDataSlices) StateSave 

func (d *DevAddrSegmentDataSlices) StateSave(stateSinkObject state.Sink)

+checklocksignore

func (*DevAddrSegmentDataSlices) StateTypeName 

func (d *DevAddrSegmentDataSlices) StateTypeName() string

type DevAddrSet 

type DevAddrSet struct {
	// contains filtered or unexported fields
}

A Set is a mapping of segments with non-overlapping Range keys. The zero value for a Set is an empty set. Set values are not safely movable nor copyable. Set is thread-compatible.

+stateify savable

func (*DevAddrSet) Add 

func (s *DevAddrSet) Add(r DevAddrRange, val pinnedAccelMem) bool

Add inserts the given segment into the set and returns true. If the new segment can be merged with adjacent segments, Add will do so. If the new segment would overlap an existing segment, Add returns false. If Add succeeds, all existing iterators are invalidated.

func (*DevAddrSet) AddWithoutMerging 

func (s *DevAddrSet) AddWithoutMerging(r DevAddrRange, val pinnedAccelMem) bool

AddWithoutMerging inserts the given segment into the set and returns true. If it would overlap an existing segment, AddWithoutMerging does nothing and returns false. If AddWithoutMerging succeeds, all existing iterators are invalidated.

func (*DevAddrSet) ApplyContiguous 

func (s *DevAddrSet) ApplyContiguous(r DevAddrRange, fn func(seg DevAddrIterator)) DevAddrGapIterator

ApplyContiguous applies a function to a contiguous range of segments, splitting if necessary. The function is applied until the first gap is encountered, at which point the gap is returned. If the function is applied across the entire range, a terminal gap is returned. All existing iterators are invalidated.

N.B. The Iterator must not be invalidated by the function.

func (*DevAddrSet) ExportSortedSlices 

func (s *DevAddrSet) ExportSortedSlices() *DevAddrSegmentDataSlices

ExportSortedSlices returns a copy of all segments in the given set, in ascending key order.

func (*DevAddrSet) Find 

func (s *DevAddrSet) Find(key uint64) (DevAddrIterator, DevAddrGapIterator)

Find returns the segment or gap whose range contains the given key. If a segment is found, the returned Iterator is non-terminal and the returned GapIterator is terminal. Otherwise, the returned Iterator is terminal and the returned GapIterator is non-terminal.

func (*DevAddrSet) FindGap 

func (s *DevAddrSet) FindGap(key uint64) DevAddrGapIterator

FindGap returns the gap containing the given key. If no such gap exists (i.e. the set contains a segment containing that key), FindGap returns a terminal iterator.

func (*DevAddrSet) FindSegment 

func (s *DevAddrSet) FindSegment(key uint64) DevAddrIterator

FindSegment returns the segment whose range contains the given key. If no such segment exists, FindSegment returns a terminal iterator.

func (*DevAddrSet) FirstGap 

func (s *DevAddrSet) FirstGap() DevAddrGapIterator

FirstGap returns the first gap in the set.

func (*DevAddrSet) FirstSegment 

func (s *DevAddrSet) FirstSegment() DevAddrIterator

FirstSegment returns the first segment in the set. If the set is empty, FirstSegment returns a terminal iterator.

func (*DevAddrSet) ImportSortedSlices 

func (s *DevAddrSet) ImportSortedSlices(sds *DevAddrSegmentDataSlices) error

ImportSortedSlices initializes the given set from the given slice.

Preconditions:

  • s must be empty.
  • sds must represent a valid set (the segments in sds must have valid lengths that do not overlap).
  • The segments in sds must be sorted in ascending key order.

func (*DevAddrSet) Insert 

func (s *DevAddrSet) Insert(gap DevAddrGapIterator, r DevAddrRange, val pinnedAccelMem) DevAddrIterator

Insert inserts the given segment into the given gap. If the new segment can be merged with adjacent segments, Insert will do so. Insert returns an iterator to the segment containing the inserted value (which may have been merged with other values). All existing iterators (including gap, but not including the returned iterator) are invalidated.

If the gap cannot accommodate the segment, or if r is invalid, Insert panics.

Insert is semantically equivalent to a InsertWithoutMerging followed by a Merge, but may be more efficient. Note that there is no unchecked variant of Insert since Insert must retrieve and inspect gap's predecessor and successor segments regardless.

func (*DevAddrSet) InsertWithoutMerging 

func (s *DevAddrSet) InsertWithoutMerging(gap DevAddrGapIterator, r DevAddrRange, val pinnedAccelMem) DevAddrIterator

InsertWithoutMerging inserts the given segment into the given gap and returns an iterator to the inserted segment. All existing iterators (including gap, but not including the returned iterator) are invalidated.

If the gap cannot accommodate the segment, or if r is invalid, InsertWithoutMerging panics.

func (*DevAddrSet) InsertWithoutMergingUnchecked 

func (s *DevAddrSet) InsertWithoutMergingUnchecked(gap DevAddrGapIterator, r DevAddrRange, val pinnedAccelMem) DevAddrIterator

InsertWithoutMergingUnchecked inserts the given segment into the given gap and returns an iterator to the inserted segment. All existing iterators (including gap, but not including the returned iterator) are invalidated.

Preconditions:

  • r.Start >= gap.Start().
  • r.End <= gap.End().

func (*DevAddrSet) IsEmpty 

func (s *DevAddrSet) IsEmpty() bool

IsEmpty returns true if the set contains no segments.

func (*DevAddrSet) IsEmptyRange 

func (s *DevAddrSet) IsEmptyRange(r DevAddrRange) bool

IsEmptyRange returns true iff no segments in the set overlap the given range. This is semantically equivalent to s.SpanRange(r) == 0, but may be more efficient.

func (*DevAddrSet) Isolate 

func (s *DevAddrSet) Isolate(seg DevAddrIterator, r DevAddrRange) DevAddrIterator

Isolate ensures that the given segment's range does not escape r by splitting at r.Start and r.End if necessary, and returns an updated iterator to the bounded segment. All existing iterators (including seg, but not including the returned iterators) are invalidated.

func (*DevAddrSet) LastGap 

func (s *DevAddrSet) LastGap() DevAddrGapIterator

LastGap returns the last gap in the set.

func (*DevAddrSet) LastSegment 

func (s *DevAddrSet) LastSegment() DevAddrIterator

LastSegment returns the last segment in the set. If the set is empty, LastSegment returns a terminal iterator.

func (*DevAddrSet) LowerBoundGap 

func (s *DevAddrSet) LowerBoundGap(min uint64) DevAddrGapIterator

LowerBoundGap returns the gap with the lowest range that is greater than or equal to min.

func (*DevAddrSet) LowerBoundSegment 

func (s *DevAddrSet) LowerBoundSegment(min uint64) DevAddrIterator

LowerBoundSegment returns the segment with the lowest range that contains a key greater than or equal to min. If no such segment exists, LowerBoundSegment returns a terminal iterator.

func (*DevAddrSet) Merge 

func (s *DevAddrSet) Merge(first, second DevAddrIterator) DevAddrIterator

Merge attempts to merge two neighboring segments. If successful, Merge returns an iterator to the merged segment, and all existing iterators are invalidated. Otherwise, Merge returns a terminal iterator.

If first is not the predecessor of second, Merge panics.

func (*DevAddrSet) MergeAdjacent 

func (s *DevAddrSet) MergeAdjacent(r DevAddrRange)

MergeAdjacent attempts to merge the segment containing r.Start with its predecessor, and the segment containing r.End-1 with its successor.

func (*DevAddrSet) MergeAll 

func (s *DevAddrSet) MergeAll()

MergeAll attempts to merge all adjacent segments in the set. All existing iterators are invalidated.

func (*DevAddrSet) MergeRange 

func (s *DevAddrSet) MergeRange(r DevAddrRange)

MergeRange attempts to merge all adjacent segments that contain a key in the specific range. All existing iterators are invalidated.

func (*DevAddrSet) MergeUnchecked 

func (s *DevAddrSet) MergeUnchecked(first, second DevAddrIterator) DevAddrIterator

MergeUnchecked attempts to merge two neighboring segments. If successful, MergeUnchecked returns an iterator to the merged segment, and all existing iterators are invalidated. Otherwise, MergeUnchecked returns a terminal iterator.

Precondition: first is the predecessor of second: first.NextSegment() == second, first == second.PrevSegment().

func (*DevAddrSet) Remove 

func (s *DevAddrSet) Remove(seg DevAddrIterator) DevAddrGapIterator

Remove removes the given segment and returns an iterator to the vacated gap. All existing iterators (including seg, but not including the returned iterator) are invalidated.

func (*DevAddrSet) RemoveAll 

func (s *DevAddrSet) RemoveAll()

RemoveAll removes all segments from the set. All existing iterators are invalidated.

func (*DevAddrSet) RemoveRange 

func (s *DevAddrSet) RemoveRange(r DevAddrRange) DevAddrGapIterator

RemoveRange removes all segments in the given range. An iterator to the newly formed gap is returned, and all existing iterators are invalidated.

func (*DevAddrSet) Span 

func (s *DevAddrSet) Span() uint64

Span returns the total size of all segments in the set.

func (*DevAddrSet) SpanRange 

func (s *DevAddrSet) SpanRange(r DevAddrRange) uint64

SpanRange returns the total size of the intersection of segments in the set with the given range.

func (*DevAddrSet) Split 

func (s *DevAddrSet) Split(seg DevAddrIterator, split uint64) (DevAddrIterator, DevAddrIterator)

Split splits the given segment at the given key and returns iterators to the two resulting segments. All existing iterators (including seg, but not including the returned iterators) are invalidated.

If the segment cannot be split at split (because split is at the start or end of the segment's range, so splitting would produce a segment with zero length, or because split falls outside the segment's range altogether), Split panics.

func (*DevAddrSet) SplitAt 

func (s *DevAddrSet) SplitAt(split uint64) bool

SplitAt splits the segment straddling split, if one exists. SplitAt returns true if a segment was split and false otherwise. If SplitAt splits a segment, all existing iterators are invalidated.

func (*DevAddrSet) SplitUnchecked 

func (s *DevAddrSet) SplitUnchecked(seg DevAddrIterator, split uint64) (DevAddrIterator, DevAddrIterator)

SplitUnchecked splits the given segment at the given key and returns iterators to the two resulting segments. All existing iterators (including seg, but not including the returned iterators) are invalidated.

Preconditions: seg.Start() < key < seg.End().

func (*DevAddrSet) StateFields 

func (s *DevAddrSet) StateFields() []string

func (*DevAddrSet) StateLoad 

func (s *DevAddrSet) StateLoad(stateSourceObject state.Source)

+checklocksignore

func (*DevAddrSet) StateSave 

func (s *DevAddrSet) StateSave(stateSinkObject state.Sink)

+checklocksignore

func (*DevAddrSet) StateTypeName 

func (s *DevAddrSet) StateTypeName() string

func (*DevAddrSet) String 

func (s *DevAddrSet) String() string

String stringifies a Set for debugging.

func (*DevAddrSet) UpperBoundGap 

func (s *DevAddrSet) UpperBoundGap(max uint64) DevAddrGapIterator

UpperBoundGap returns the gap with the highest range that is less than or equal to max.

func (*DevAddrSet) UpperBoundSegment 

func (s *DevAddrSet) UpperBoundSegment(max uint64) DevAddrIterator

UpperBoundSegment returns the segment with the highest range that contains a key less than or equal to max. If no such segment exists, UpperBoundSegment returns a terminal iterator.

type DevAddrdynamicGap 

type DevAddrdynamicGap [DevAddrtrackGaps]uint64

dynamicGap is a type that disappears if trackGaps is 0.

func (*DevAddrdynamicGap) Get 

func (d *DevAddrdynamicGap) Get() uint64

Get returns the value of the gap.

Precondition: trackGaps must be non-zero.

func (*DevAddrdynamicGap) Set 

func (d *DevAddrdynamicGap) Set(v uint64)

Set sets the value of the gap.

Precondition: trackGaps must be non-zero.

type DevAddrnode 

type DevAddrnode struct {
	// contains filtered or unexported fields
}

+stateify savable

func (*DevAddrnode) StateFields 

func (n *DevAddrnode) StateFields() []string

func (*DevAddrnode) StateLoad 

func (n *DevAddrnode) StateLoad(stateSourceObject state.Source)

+checklocksignore

func (*DevAddrnode) StateSave 

func (n *DevAddrnode) StateSave(stateSinkObject state.Sink)

+checklocksignore

func (*DevAddrnode) StateTypeName 

func (n *DevAddrnode) StateTypeName() string

func (*DevAddrnode) String 

func (n *DevAddrnode) String() string

String stringifies a node (and all of its children) for debugging.

Source Files

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