15951470896

Committed 29 Jun 2025 04:23AM UTC coverage: 67.594% (-0.01%) from 67.606%

Build # 15951470896

Build Type

Pull #9751

github

Committed by

web-flow

Commit Message

Merge 599d9b051 into 6290edf14

Pull Request Pull Request #9751: multi: update Go to 1.23.10 and update some packages

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100.0

/graph/db/reject_cache.go

package graphdb

// rejectFlags is a compact representation of various metadata stored by the
// reject cache about a particular channel.
type rejectFlags uint8

const (
        // rejectFlagExists is a flag indicating whether the channel exists,
        // i.e. the channel is open and has a recent channel update. If this
        // flag is not set, the channel is either a zombie or unknown.
        rejectFlagExists rejectFlags = 1 << iota

        // rejectFlagZombie is a flag indicating whether the channel is a
        // zombie, i.e. the channel is open but has no recent channel updates.
        rejectFlagZombie
)

// packRejectFlags computes the rejectFlags corresponding to the passed boolean
// values indicating whether the edge exists or is a zombie.
func packRejectFlags(exists, isZombie bool) rejectFlags {
        var flags rejectFlags
        if exists {
                flags |= rejectFlagExists
        }
        if isZombie {
                flags |= rejectFlagZombie
        }

        return flags
}

// unpack returns the booleans packed into the rejectFlags. The first indicates
// if the edge exists in our graph, the second indicates if the edge is a
// zombie.
func (f rejectFlags) unpack() (bool, bool) {
        return f&rejectFlagExists == rejectFlagExists,
                f&rejectFlagZombie == rejectFlagZombie
}

// rejectCacheEntry caches frequently accessed information about a channel,
// including the timestamps of its latest edge policies and whether or not the
// channel exists in the graph.
type rejectCacheEntry struct {
        upd1Time int64
        upd2Time int64
        flags    rejectFlags
}

// rejectCache is an in-memory cache used to improve the performance of
// HasChannelEdge. It caches information about the whether or channel exists, as
// well as the most recent timestamps for each policy (if they exists).
type rejectCache struct {
        n     int
        edges map[uint64]rejectCacheEntry
}

// newRejectCache creates a new rejectCache with maximum capacity of n entries.
func newRejectCache(n int) *rejectCache {
        return &rejectCache{
                n:     n,
                edges: make(map[uint64]rejectCacheEntry, n),
        }
}

// get returns the entry from the cache for chanid, if it exists.
func (c *rejectCache) get(chanid uint64) (rejectCacheEntry, bool) {
        entry, ok := c.edges[chanid]
        return entry, ok
}

// insert adds the entry to the reject cache. If an entry for chanid already
// exists, it will be replaced with the new entry. If the entry doesn't exists,
// it will be inserted to the cache, performing a random eviction if the cache
// is at capacity.
func (c *rejectCache) insert(chanid uint64, entry rejectCacheEntry) {
        // If entry exists, replace it.
        if _, ok := c.edges[chanid]; ok {
                c.edges[chanid] = entry
                return
        }

        // Otherwise, evict an entry at random and insert.
        if len(c.edges) == c.n {
                for id := range c.edges {
                        delete(c.edges, id)
                        break
                }
        }
        c.edges[chanid] = entry
}

// remove deletes an entry for chanid from the cache, if it exists.
func (c *rejectCache) remove(chanid uint64) {
        delete(c.edges, chanid)
}

1	package graphdb
2
3	// rejectFlags is a compact representation of various metadata stored by the
4	// reject cache about a particular channel.
5	type rejectFlags uint8
6
7	const (
8	// rejectFlagExists is a flag indicating whether the channel exists,
9	// i.e. the channel is open and has a recent channel update. If this
10	// flag is not set, the channel is either a zombie or unknown.
11	rejectFlagExists rejectFlags = 1 << iota
12
13	// rejectFlagZombie is a flag indicating whether the channel is a
14	// zombie, i.e. the channel is open but has no recent channel updates.
15	rejectFlagZombie
16	)
17
18	// packRejectFlags computes the rejectFlags corresponding to the passed boolean
19	// values indicating whether the edge exists or is a zombie.
20	func packRejectFlags(exists, isZombie bool) rejectFlags {	644✔
21	var flags rejectFlags	644✔
22	if exists {	951✔
23	flags \|= rejectFlagExists	307✔
24	}	307✔
25	if isZombie {	848✔
26	flags \|= rejectFlagZombie	204✔
27	}	204✔
28
29	return flags	644✔
30	}
31
32	// unpack returns the booleans packed into the rejectFlags. The first indicates
33	// if the edge exists in our graph, the second indicates if the edge is a
34	// zombie.
35	func (f rejectFlags) unpack() (bool, bool) {	81✔
36	return f&rejectFlagExists == rejectFlagExists,	81✔
37	f&rejectFlagZombie == rejectFlagZombie	81✔
38	}	81✔
39
40	// rejectCacheEntry caches frequently accessed information about a channel,
41	// including the timestamps of its latest edge policies and whether or not the
42	// channel exists in the graph.
43	type rejectCacheEntry struct {
44	upd1Time int64
45	upd2Time int64
46	flags rejectFlags
47	}
48
49	// rejectCache is an in-memory cache used to improve the performance of
50	// HasChannelEdge. It caches information about the whether or channel exists, as
51	// well as the most recent timestamps for each policy (if they exists).
52	type rejectCache struct {
53	n int
54	edges map[uint64]rejectCacheEntry
55	}
56
57	// newRejectCache creates a new rejectCache with maximum capacity of n entries.
58	func newRejectCache(n int) *rejectCache {	173✔
59	return &rejectCache{	173✔
60	n: n,	173✔
61	edges: make(map[uint64]rejectCacheEntry, n),	173✔
62	}	173✔
63	}	173✔
64
65	// get returns the entry from the cache for chanid, if it exists.
66	func (c *rejectCache) get(chanid uint64) (rejectCacheEntry, bool) {	3,427✔
67	entry, ok := c.edges[chanid]	3,427✔
68	return entry, ok	3,427✔
69	}	3,427✔
70
71	// insert adds the entry to the reject cache. If an entry for chanid already
72	// exists, it will be replaced with the new entry. If the entry doesn't exists,
73	// it will be inserted to the cache, performing a random eviction if the cache
74	// is at capacity.
75	func (c *rejectCache) insert(chanid uint64, entry rejectCacheEntry) {	349✔
76	// If entry exists, replace it.	349✔
77	if _, ok := c.edges[chanid]; ok {	457✔
78	c.edges[chanid] = entry	108✔
79	return	108✔
80	}	108✔
81
82	// Otherwise, evict an entry at random and insert.
83	if len(c.edges) == c.n {	245✔
84	for id := range c.edges {	2✔
85	delete(c.edges, id)	1✔
86	break	1✔
87	}
88	}
89	c.edges[chanid] = entry	244✔
90	}
91
92	// remove deletes an entry for chanid from the cache, if it exists.
93	func (c *rejectCache) remove(chanid uint64) {	1,764✔
94	delete(c.edges, chanid)	1,764✔
95	}	1,764✔

lightningnetwork / lnd / 15951470896

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