Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
This commit is contained in:
committed by
Felix Lange
parent
7770304576
commit
289b30715d
160
vendor/github.com/hashicorp/golang-lru/simplelru/lru.go
generated
vendored
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160
vendor/github.com/hashicorp/golang-lru/simplelru/lru.go
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vendored
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@@ -0,0 +1,160 @@
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package simplelru
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import (
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"container/list"
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"errors"
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)
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// EvictCallback is used to get a callback when a cache entry is evicted
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type EvictCallback func(key interface{}, value interface{})
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// LRU implements a non-thread safe fixed size LRU cache
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type LRU struct {
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size int
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evictList *list.List
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items map[interface{}]*list.Element
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onEvict EvictCallback
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}
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// entry is used to hold a value in the evictList
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type entry struct {
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key interface{}
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value interface{}
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}
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// NewLRU constructs an LRU of the given size
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func NewLRU(size int, onEvict EvictCallback) (*LRU, error) {
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if size <= 0 {
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return nil, errors.New("Must provide a positive size")
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}
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c := &LRU{
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size: size,
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evictList: list.New(),
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items: make(map[interface{}]*list.Element),
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onEvict: onEvict,
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}
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return c, nil
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}
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// Purge is used to completely clear the cache
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func (c *LRU) Purge() {
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for k, v := range c.items {
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if c.onEvict != nil {
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c.onEvict(k, v.Value.(*entry).value)
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}
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delete(c.items, k)
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}
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c.evictList.Init()
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}
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// Add adds a value to the cache. Returns true if an eviction occurred.
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func (c *LRU) Add(key, value interface{}) bool {
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// Check for existing item
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if ent, ok := c.items[key]; ok {
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c.evictList.MoveToFront(ent)
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ent.Value.(*entry).value = value
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return false
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}
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// Add new item
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ent := &entry{key, value}
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entry := c.evictList.PushFront(ent)
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c.items[key] = entry
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evict := c.evictList.Len() > c.size
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// Verify size not exceeded
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if evict {
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c.removeOldest()
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}
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return evict
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}
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// Get looks up a key's value from the cache.
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func (c *LRU) Get(key interface{}) (value interface{}, ok bool) {
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if ent, ok := c.items[key]; ok {
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c.evictList.MoveToFront(ent)
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return ent.Value.(*entry).value, true
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}
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return
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}
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// Check if a key is in the cache, without updating the recent-ness
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// or deleting it for being stale.
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func (c *LRU) Contains(key interface{}) (ok bool) {
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_, ok = c.items[key]
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return ok
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}
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// Returns the key value (or undefined if not found) without updating
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// the "recently used"-ness of the key.
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func (c *LRU) Peek(key interface{}) (value interface{}, ok bool) {
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if ent, ok := c.items[key]; ok {
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return ent.Value.(*entry).value, true
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}
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return nil, ok
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}
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// Remove removes the provided key from the cache, returning if the
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// key was contained.
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func (c *LRU) Remove(key interface{}) bool {
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if ent, ok := c.items[key]; ok {
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c.removeElement(ent)
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return true
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}
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return false
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}
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// RemoveOldest removes the oldest item from the cache.
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func (c *LRU) RemoveOldest() (interface{}, interface{}, bool) {
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ent := c.evictList.Back()
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if ent != nil {
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c.removeElement(ent)
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kv := ent.Value.(*entry)
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return kv.key, kv.value, true
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}
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return nil, nil, false
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}
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// GetOldest returns the oldest entry
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func (c *LRU) GetOldest() (interface{}, interface{}, bool) {
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ent := c.evictList.Back()
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if ent != nil {
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kv := ent.Value.(*entry)
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return kv.key, kv.value, true
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}
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return nil, nil, false
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}
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// Keys returns a slice of the keys in the cache, from oldest to newest.
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func (c *LRU) Keys() []interface{} {
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keys := make([]interface{}, len(c.items))
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i := 0
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for ent := c.evictList.Back(); ent != nil; ent = ent.Prev() {
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keys[i] = ent.Value.(*entry).key
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i++
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}
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return keys
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}
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// Len returns the number of items in the cache.
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func (c *LRU) Len() int {
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return c.evictList.Len()
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}
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// removeOldest removes the oldest item from the cache.
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func (c *LRU) removeOldest() {
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ent := c.evictList.Back()
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if ent != nil {
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c.removeElement(ent)
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}
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}
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// removeElement is used to remove a given list element from the cache
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func (c *LRU) removeElement(e *list.Element) {
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c.evictList.Remove(e)
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kv := e.Value.(*entry)
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delete(c.items, kv.key)
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if c.onEvict != nil {
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c.onEvict(kv.key, kv.value)
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}
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}
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