diff options
Diffstat (limited to 'vendor/github.com/getlantern/context')
| -rw-r--r-- | vendor/github.com/getlantern/context/LICENSE | 202 | ||||
| -rw-r--r-- | vendor/github.com/getlantern/context/README.md | 6 | ||||
| -rw-r--r-- | vendor/github.com/getlantern/context/context.go | 309 | ||||
| -rw-r--r-- | vendor/github.com/getlantern/context/context_test.go | 160 | ||||
| -rw-r--r-- | vendor/github.com/getlantern/context/gotrack.go | 130 |
5 files changed, 0 insertions, 807 deletions
diff --git a/vendor/github.com/getlantern/context/LICENSE b/vendor/github.com/getlantern/context/LICENSE deleted file mode 100644 index 5dc6c26..0000000 --- a/vendor/github.com/getlantern/context/LICENSE +++ /dev/null @@ -1,202 +0,0 @@ - - Apache License - Version 2.0, January 2004 - http://www.apache.org/licenses/ - - TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION - - 1. Definitions. - - "License" shall mean the terms and conditions for use, reproduction, - and distribution as defined by Sections 1 through 9 of this document. - - "Licensor" shall mean the copyright owner or entity authorized by - the copyright owner that is granting the License. - - "Legal Entity" shall mean the union of the acting entity and all - other entities that control, are controlled by, or are under common - control with that entity. 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However, in accepting such obligations, You may act only - on Your own behalf and on Your sole responsibility, not on behalf - of any other Contributor, and only if You agree to indemnify, - defend, and hold each Contributor harmless for any liability - incurred by, or claims asserted against, such Contributor by reason - of your accepting any such warranty or additional liability. - - END OF TERMS AND CONDITIONS - - APPENDIX: How to apply the Apache License to your work. - - To apply the Apache License to your work, attach the following - boilerplate notice, with the fields enclosed by brackets "[]" - replaced with your own identifying information. (Don't include - the brackets!) The text should be enclosed in the appropriate - comment syntax for the file format. We also recommend that a - file or class name and description of purpose be included on the - same "printed page" as the copyright notice for easier - identification within third-party archives. - - Copyright 2016 Brave New Software Project, Inc. - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. diff --git a/vendor/github.com/getlantern/context/README.md b/vendor/github.com/getlantern/context/README.md deleted file mode 100644 index 978c9e0..0000000 --- a/vendor/github.com/getlantern/context/README.md +++ /dev/null @@ -1,6 +0,0 @@ -# context [](https://travis-ci.org/getlantern/context) [](https://coveralls.io/r/getlantern/context) - -Provides goroutine-based context state inspired by https://github.com/tylerb/gls -and https://github.com/jtolds/gls. It uses the same basic hack as tylerb's -library, but adds a stack abstraction that allows nested contexts similar to -jtolds' library, but using `Enter()` and `Exit()` instead of callback functions. diff --git a/vendor/github.com/getlantern/context/context.go b/vendor/github.com/getlantern/context/context.go deleted file mode 100644 index c77f129..0000000 --- a/vendor/github.com/getlantern/context/context.go +++ /dev/null @@ -1,309 +0,0 @@ -// Package context provides a mechanism for transparently tracking contextual -// state associated to the current goroutine and even across goroutines. -package context - -import ( - "sync" -) - -// Manager provides the ability to create and access Contexts. -type Manager interface { - // Enter enters a new level on the current Context stack, creating a new Context - // if necessary. - Enter() Context - - // Go starts the given function on a new goroutine but sharing the context of - // the current goroutine (if it has one). - Go(func()) - - // PutGlobal puts the given key->value pair into the global context. - PutGlobal(key string, value interface{}) - - // PutGlobalDynamic puts a key->value pair into the global context where the - // value is generated by a function that gets evaluated at every Read. If the - // value is a map[string]interface{}, we will unpack the map and set each - // contained key->value pair independently. - PutGlobalDynamic(key string, valueFN func() interface{}) - - // AsMap returns a map containing all values from the supplied obj if it is a - // Contextual, plus any addition values from along the stack, plus globals if so - // specified. - AsMap(obj interface{}, includeGlobals bool) Map -} - -type manager struct { - contexts map[uint64]*context - mxContexts sync.RWMutex - global Map - mxGlobal sync.RWMutex -} - -// NewManager creates a new Manager -func NewManager() Manager { - return &manager{ - contexts: make(map[uint64]*context), - global: make(Map), - } -} - -// Contextual is an interface for anything that maintains its own context. -type Contextual interface { - // Fill fills the given Map with all of this Contextual's context - Fill(m Map) -} - -// Map is a map of key->value pairs. -type Map map[string]interface{} - -// Fill implements the method from the Contextual interface. -func (_m Map) Fill(m Map) { - for key, value := range _m { - m[key] = value - } -} - -// Context is a context containing key->value pairs -type Context interface { - // Enter enters a new level on this Context stack. - Enter() Context - - // Go starts the given function on a new goroutine. - Go(fn func()) - - // Exit exits the current level on this Context stack. - Exit() - - // Put puts a key->value pair into the current level of the context stack. - Put(key string, value interface{}) Context - - // PutIfAbsent puts the given key->value pair into the current level of the - // context stack if and only if that key is defined nowhere within the context - // stack (including parent contexts). - PutIfAbsent(key string, value interface{}) Context - - // PutDynamic puts a key->value pair into the current level of the context - // stack where the value is generated by a function that gets evaluated at - // every Read. If the value is a map[string]interface{}, we will unpack the - // map and set each contained key->value pair independently. - PutDynamic(key string, valueFN func() interface{}) Context - - // Fill fills the given map with data from this Context - Fill(m Map) - - // AsMap returns a map containing all values from the supplied obj if it is a - // Contextual, plus any addition values from along the stack, plus globals if - // so specified. - AsMap(obj interface{}, includeGlobals bool) Map -} - -type context struct { - cm *manager - id uint64 - parent *context - branchedFrom *context - data Map - mx sync.RWMutex -} - -type dynval struct { - fn func() interface{} -} - -func (cm *manager) Enter() Context { - return cm.enter(curGoroutineID()) -} - -func (cm *manager) enter(id uint64) *context { - cm.mxContexts.Lock() - parentOrNil := cm.contexts[id] - c := cm.makeContext(id, parentOrNil, nil) - cm.contexts[id] = c - cm.mxContexts.Unlock() - return c -} - -func (cm *manager) exit(id uint64, parent *context) { - cm.mxContexts.Lock() - if parent == nil { - delete(cm.contexts, id) - } else { - cm.contexts[id] = parent - } - cm.mxContexts.Unlock() -} - -func (cm *manager) branch(id uint64, from *context) { - next := cm.makeContext(id, nil, from) - cm.mxContexts.Lock() - cm.contexts[id] = next - cm.mxContexts.Unlock() -} - -func (cm *manager) merge(id uint64) { - cm.mxContexts.Lock() - delete(cm.contexts, id) - cm.mxContexts.Unlock() -} - -func (c *context) Enter() Context { - c.mx.RLock() - id := c.id - c.mx.RUnlock() - return c.cm.enter(id) -} - -func (c *context) Go(fn func()) { - go func() { - id := curGoroutineID() - c.cm.branch(id, c) - fn() - c.cm.merge(id) - }() -} - -func (cm *manager) Go(fn func()) { - c := cm.currentContext() - if c != nil { - c.Go(fn) - } else { - go fn() - } -} - -func (cm *manager) makeContext(id uint64, parent *context, branchedFrom *context) *context { - return &context{ - cm: cm, - id: id, - parent: parent, - branchedFrom: branchedFrom, - data: make(Map), - } -} - -func (c *context) Exit() { - c.mx.RLock() - id := c.id - parent := c.parent - c.mx.RUnlock() - c.cm.exit(id, parent) -} - -func (c *context) Put(key string, value interface{}) Context { - c.mx.Lock() - c.data[key] = value - c.mx.Unlock() - return c -} - -func (c *context) PutIfAbsent(key string, value interface{}) Context { - for ctx := c; ctx != nil; { - ctx.mx.RLock() - _, exists := ctx.data[key] - next := ctx.parent - if next == nil { - next = ctx.branchedFrom - } - ctx.mx.RUnlock() - if exists { - return c - } - ctx = next - } - - // Value not set, set it - return c.Put(key, value) -} - -func (c *context) PutDynamic(key string, valueFN func() interface{}) Context { - value := &dynval{valueFN} - c.mx.Lock() - c.data[key] = value - c.mx.Unlock() - return c -} - -func (cm *manager) PutGlobal(key string, value interface{}) { - cm.mxGlobal.Lock() - cm.global[key] = value - cm.mxGlobal.Unlock() -} - -func (cm *manager) PutGlobalDynamic(key string, valueFN func() interface{}) { - value := &dynval{valueFN} - cm.mxGlobal.Lock() - cm.global[key] = value - cm.mxGlobal.Unlock() -} - -func (c *context) Fill(m Map) { - for ctx := c; ctx != nil; { - ctx.mx.RLock() - fill(m, ctx.data) - next := ctx.parent - if next == nil { - next = ctx.branchedFrom - } - ctx.mx.RUnlock() - ctx = next - } -} - -func (cm *manager) AsMap(obj interface{}, includeGlobals bool) Map { - return cm.currentContext().asMap(cm, obj, includeGlobals) -} - -func (c *context) AsMap(obj interface{}, includeGlobals bool) Map { - return c.asMap(c.cm, obj, includeGlobals) -} - -func (c *context) asMap(cm *manager, obj interface{}, includeGlobals bool) Map { - result := make(Map, 0) - cl, ok := obj.(Contextual) - if ok { - cl.Fill(result) - } - if c != nil { - c.Fill(result) - } - if includeGlobals { - cm.mxGlobal.RLock() - fill(result, cm.global) - cm.mxGlobal.RUnlock() - } - return result -} - -func fill(m Map, from Map) { - if m != nil { - doFill := func(key string, _value interface{}) { - switch value := _value.(type) { - case map[string]interface{}: - for k, v := range value { - m[k] = v - } - default: - m[key] = value - } - } - - for key, value := range from { - _, alreadyRead := m[key] - if !alreadyRead { - switch v := value.(type) { - case *dynval: - doFill(key, v.fn()) - default: - doFill(key, v) - } - } - } - } -} - -func (cm *manager) currentContext() *context { - id := curGoroutineID() - cm.mxContexts.RLock() - c := cm.contexts[id] - cm.mxContexts.RUnlock() - return c -} diff --git a/vendor/github.com/getlantern/context/context_test.go b/vendor/github.com/getlantern/context/context_test.go deleted file mode 100644 index 9fb86f3..0000000 --- a/vendor/github.com/getlantern/context/context_test.go +++ /dev/null @@ -1,160 +0,0 @@ -package context - -import ( - "sync" - "testing" - - "github.com/stretchr/testify/assert" -) - -func TestStack(t *testing.T) { - cm := NewManager() - _cm := cm.(*manager) - // Put globals first - cm.PutGlobal("a", -1) // This will get overriden in specific contexts - cm.PutGlobal("ga", "i") - cm.PutGlobalDynamic("gb", func() interface{} { return "ii" }) - cm.PutGlobalDynamic("gm", func() interface{} { return map[string]interface{}{"gm3": "iii", "gm4": "iv"} }) - - // Use a Map as a Contextual - var contextual = Map{ - "a": 0, // This will override whatever is in specific contexts - "contextual": "special", - } - - c := cm.Enter() - c.Put("a", 1) - penultimate := cm.Enter(). - Put("b", 2) - c = cm.Enter(). - PutDynamic("c", func() interface{} { return 4 }). - PutIfAbsent("d", 5). - PutIfAbsent("a", 11) - - // Put something in the penultimate context and make sure it doesn't override - // what's set in the ultimate context - penultimate.Put("c", 3) - - var assertMutex sync.Mutex - doAssertContents := func(expected Map, actual Map, scope string) { - assertMutex.Lock() - assert.Equal(t, expected, actual, scope) - assertMutex.Unlock() - } - - assertContents := func(expected Map) { - doAssertContents(expected, cm.AsMap(nil, false), "AsMapwith(nil, false)") - expected["ga"] = "i" - expected["gb"] = "ii" - expected["gm3"] = "iii" - expected["gm4"] = "iv" - _, exists := expected["a"] - if !exists { - expected["a"] = -1 - } - doAssertContents(expected, cm.AsMap(nil, true), "AsMap(nil, true)") - expected["a"] = 0 - expected["contextual"] = "special" - doAssertContents(expected, cm.AsMap(contextual, true), "AsMapWith(contextual, true)") - delete(expected, "ga") - delete(expected, "gb") - delete(expected, "gm3") - delete(expected, "gm4") - doAssertContents(expected, cm.AsMap(contextual, false), "AsMapWith(contextual, false)") - } - - assertContents(Map{ - "a": 1, - "b": 2, - "c": 4, - "d": 5, - }) - - var wg sync.WaitGroup - wg.Add(1) - cm.Go(func() { - defer cm.Enter().Put("e", 6).Exit() - assertContents(Map{ - "a": 1, - "b": 2, - "c": 4, - "d": 5, - "e": 6, - }) - wg.Done() - }) - wg.Wait() - - wg.Add(1) - cm.Go(func() { - // This goroutine doesn't Exit. Still, we shouldn't leak anything. - wg.Done() - }) - wg.Wait() - - assertContents(Map{ - "a": 1, - "b": 2, - "c": 4, - "d": 5, - }) - - c.Exit() - c = _cm.currentContext() - assert.NotNil(t, c) - assertContents(Map{ - "a": 1, - "b": 2, - "c": 3, - }) - - c.Exit() - c = _cm.currentContext() - assert.NotNil(t, c) - assertContents(Map{ - "a": 1, - }) - - // Last exit - c.Exit() - assert.Nil(t, _cm.currentContext()) - assertContents(Map{}) - - // Exit again, just for good measure - c.Exit() - assert.Nil(t, _cm.currentContext()) - assertContents(Map{}) - - // Spawn a goroutine with no existing contexts - wg.Add(1) - cm.Go(func() { - defer cm.Enter().Put("f", 7).Exit() - assertContents(Map{ - "f": 7, - }) - wg.Done() - }) - wg.Wait() - - _cm.mxContexts.Lock() - assert.Empty(t, _cm.contexts, "No contexts should be left") - _cm.mxContexts.Unlock() -} - -func BenchmarkPut(b *testing.B) { - cm := NewManager() - c := cm.Enter() - b.ResetTimer() - for i := 0; i < b.N; i++ { - c.Put("key", "value") - } -} - -func BenchmarkAsMap(b *testing.B) { - cm := NewManager() - cm.Enter().Put("a", 1).Put("b", 2) - b.ResetTimer() - for i := 0; i < b.N; i++ { - cm.AsMap(nil, true) - } -} diff --git a/vendor/github.com/getlantern/context/gotrack.go b/vendor/github.com/getlantern/context/gotrack.go deleted file mode 100644 index 7f92346..0000000 --- a/vendor/github.com/getlantern/context/gotrack.go +++ /dev/null @@ -1,130 +0,0 @@ -package context - -import ( - "bytes" - "errors" - "fmt" - "runtime" - "strconv" - "sync" -) - -// Sourced https://github.com/bradfitz/http2/blob/dc0c5c000ec33e263612939744d51a3b68b9cece/gotrack.go -var goroutineSpace = []byte("goroutine ") -var littleBuf = sync.Pool{ - New: func() interface{} { - buf := make([]byte, 64) - return &buf - }, -} - -func curGoroutineID() uint64 { - bp := littleBuf.Get().(*[]byte) - defer littleBuf.Put(bp) - b := *bp - b = b[:runtime.Stack(b, false)] - // Parse the 4707 out of "goroutine 4707 [" - b = bytes.TrimPrefix(b, goroutineSpace) - i := bytes.IndexByte(b, ' ') - if i < 0 { - panic(fmt.Sprintf("No space found in %q", b)) - } - b = b[:i] - n, err := parseUintBytes(b, 10, 64) - if err != nil { - panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err)) - } - return n -} - -// parseUintBytes is like strconv.ParseUint, but using a []byte. -func parseUintBytes(s []byte, base int, bitSize int) (n uint64, err error) { - var cutoff, maxVal uint64 - - if bitSize == 0 { - bitSize = int(strconv.IntSize) - } - - s0 := s - switch { - case len(s) < 1: - err = strconv.ErrSyntax - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - - case 2 <= base && base <= 36: - // valid base; nothing to do - - case base == 0: - // Look for octal, hex prefix. - switch { - case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'): - base = 16 - s = s[2:] - if len(s) < 1 { - err = strconv.ErrSyntax - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - case s[0] == '0': - base = 8 - default: - base = 10 - } - - default: - err = errors.New("invalid base " + strconv.Itoa(base)) - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - - n = 0 - cutoff = cutoff64(base) - maxVal = 1<<uint(bitSize) - 1 - - for i := 0; i < len(s); i++ { - var v byte - d := s[i] - switch { - case '0' <= d && d <= '9': - v = d - '0' - case 'a' <= d && d <= 'z': - v = d - 'a' + 10 - case 'A' <= d && d <= 'Z': - v = d - 'A' + 10 - default: - n = 0 - err = strconv.ErrSyntax - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - if int(v) >= base { - n = 0 - err = strconv.ErrSyntax - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - - if n >= cutoff { - // n*base overflows - n = 1<<64 - 1 - err = strconv.ErrRange - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - n *= uint64(base) - - n1 := n + uint64(v) - if n1 < n || n1 > maxVal { - // n+v overflows - n = 1<<64 - 1 - err = strconv.ErrRange - return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err} - } - n = n1 - } - - return n, nil -} - -// Return the first number n such that n*base >= 1<<64. -func cutoff64(base int) uint64 { - if base < 2 { - return 0 - } - return (1<<64-1)/uint64(base) + 1 -} |