[VOL-1349] EPON OLT adapter (package B)
Change-Id: I634ef62c53813dcf4456f54948f13e06358e263c
diff --git a/vendor/github.com/boljen/go-bitmap/LICENSE b/vendor/github.com/boljen/go-bitmap/LICENSE
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--- /dev/null
+++ b/vendor/github.com/boljen/go-bitmap/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Bol Christophe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/vendor/github.com/boljen/go-bitmap/README.md b/vendor/github.com/boljen/go-bitmap/README.md
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+++ b/vendor/github.com/boljen/go-bitmap/README.md
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+# Bitmap (Go)
+
+Package bitmap implements (thread-safe) bitmap functions and abstractions
+
+## Install
+
+ go get github.com/boljen/go-bitmap
+
+## Documentation
+
+See [godoc](https://godoc.org/github.com/boljen/go-bitmap)
+
+## Example
+
+ package main
+
+ import (
+ "fmt"
+ "github.com/boljen/go-bitmap"
+ )
+
+ func main() {
+ bm := bitmap.New(100)
+ bm.Set(0, true)
+ fmt.Println(bm.Get(0))
+ }
+
+## License
+
+MIT
diff --git a/vendor/github.com/boljen/go-bitmap/atomic.go b/vendor/github.com/boljen/go-bitmap/atomic.go
new file mode 100644
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+++ b/vendor/github.com/boljen/go-bitmap/atomic.go
@@ -0,0 +1,64 @@
+package bitmap
+
+import (
+ "sync/atomic"
+ "unsafe"
+)
+
+var oobPanic = "SetAtomic not allowed on a bitmapSlice of cap() < 4"
+
+// SetAtomic is similar to Set except that it performs the operation atomically.
+func SetAtomic(bitmap []byte, targetBit int, targetValue bool) {
+ ov := (*[1]uint32)(unsafe.Pointer(&bitmap[targetBit/32]))[:]
+ SetAtomicUint32(ov, targetBit%32, targetValue)
+}
+
+// SetAtomic is similar to Set except that it performs the operation atomically.
+// It needs a bitmapSlice where the capacity is at least 4 bytes.
+func _SetAtomic(bitmapSlice []byte, targetBit int, targetValue bool) {
+ targetByteIndex := targetBit / 8
+ targetBitIndex := targetBit % 8
+ targetOffset := 0
+
+ // SetAtomic needs to modify 4 bytes of data so we panic when the slice
+ // doesn't have a capacity of at least 4 bytes.
+ if cap(bitmapSlice) < 4 {
+ panic(oobPanic)
+ }
+
+ // Calculate the Offset of the targetByte inside the 4-byte atomic batch.
+ // This is needed to ensure that atomic operations can happen as long as
+ // the bitmapSlice equals 4 bytes or more.
+ if cap(bitmapSlice) < targetByteIndex+3 {
+ targetOffset = cap(bitmapSlice) - targetByteIndex
+ }
+
+ // This gets a pointer to the memory of 4 bytes inside the bitmapSlice.
+ // It stores this pointer as an *uint32 so that it can be used to
+ // execute sync.atomic operations.
+ targetBytePointer := (*uint32)(unsafe.Pointer(&bitmapSlice[targetByteIndex-targetOffset]))
+
+ for {
+ // localValue is a copy of the uint32 value at *targetBytePointer.
+ // It's used to check whether the targetBit must be updated,
+ // and if so, to construct the new value for targetBytePointer.
+ localValue := atomic.LoadUint32(targetBytePointer)
+
+ // This "neutralizes" the uint32 conversion by getting a pointer to the
+ // 4-byte array stored undereneath the uint32.
+ targetByteCopyPointer := (*[4]byte)(unsafe.Pointer(&localValue))
+
+ // Work is done when targetBit is already set to targetValue.
+ if GetBit(targetByteCopyPointer[targetOffset], targetBitIndex) == targetValue {
+ return
+ }
+
+ // Modify the targetBit and update memory so that the targetBit is the only bit
+ // that has been modified in the batch.
+ referenceValue := localValue
+ SetBitRef(&targetByteCopyPointer[targetOffset], targetBitIndex, targetValue)
+ if atomic.CompareAndSwapUint32(targetBytePointer, referenceValue, localValue) {
+ break
+ }
+ }
+}
diff --git a/vendor/github.com/boljen/go-bitmap/bitmap.go b/vendor/github.com/boljen/go-bitmap/bitmap.go
new file mode 100644
index 0000000..dfe5cc2
--- /dev/null
+++ b/vendor/github.com/boljen/go-bitmap/bitmap.go
@@ -0,0 +1,200 @@
+// Package bitmap implements (thread-safe) bitmap functions and abstractions.
+//
+// Installation
+//
+// go get github.com/boljen/go-bitmap
+package bitmap
+
+import "sync"
+
+var (
+ tA = [8]byte{1, 2, 4, 8, 16, 32, 64, 128}
+ tB = [8]byte{254, 253, 251, 247, 239, 223, 191, 127}
+)
+
+func dataOrCopy(d []byte, c bool) []byte {
+ if !c {
+ return d
+ }
+ ndata := make([]byte, len(d))
+ copy(ndata, d)
+ return ndata
+}
+
+// NewSlice creates a new byteslice with length l (in bits).
+// The actual size in bits might be up to 7 bits larger because
+// they are stored in a byteslice.
+func NewSlice(l int) []byte {
+ remainder := l % 8
+ if remainder != 0 {
+ remainder = 1
+ }
+ return make([]byte, l/8+remainder)
+}
+
+// Get returns the value of bit i from map m.
+// It doesn't check the bounds of the slice.
+func Get(m []byte, i int) bool {
+ return m[i/8]&tA[i%8] != 0
+}
+
+// Set sets bit i of map m to value v.
+// It doesn't check the bounds of the slice.
+func Set(m []byte, i int, v bool) {
+ index := i / 8
+ bit := i % 8
+ if v {
+ m[index] = m[index] | tA[bit]
+ } else {
+ m[index] = m[index] & tB[bit]
+ }
+}
+
+// GetBit returns the value of bit i of byte b.
+// The bit index must be between 0 and 7.
+func GetBit(b byte, i int) bool {
+ return b&tA[i] != 0
+}
+
+// SetBit sets bit i of byte b to value v.
+// The bit index must be between 0 and 7.
+func SetBit(b byte, i int, v bool) byte {
+ if v {
+ return b | tA[i]
+ }
+ return b & tB[i]
+}
+
+// SetBitRef sets bit i of byte *b to value v.
+func SetBitRef(b *byte, i int, v bool) {
+ if v {
+ *b = *b | tA[i]
+ } else {
+ *b = *b & tB[i]
+ }
+}
+
+// Len returns the length (in bits) of the provided byteslice.
+// It will always be a multipile of 8 bits.
+func Len(m []byte) int {
+ return len(m) * 8
+}
+
+// Bitmap is a byteslice with bitmap functions.
+// Creating one form existing data is as simple as bitmap := Bitmap(data).
+type Bitmap []byte
+
+// New creates a new Bitmap instance with length l (in bits).
+func New(l int) Bitmap {
+ return NewSlice(l)
+}
+
+// Len wraps around the Len function.
+func (b Bitmap) Len() int {
+ return Len(b)
+}
+
+// Get wraps around the Get function.
+func (b Bitmap) Get(i int) bool {
+ return Get(b, i)
+}
+
+// Set wraps around the Set function.
+func (b Bitmap) Set(i int, v bool) {
+ Set(b, i, v)
+}
+
+// Data returns the data of the bitmap.
+// If copy is false the actual underlying slice will be returned.
+func (b Bitmap) Data(copy bool) []byte {
+ return dataOrCopy(b, copy)
+}
+
+// Threadsafe implements thread-safe read- and write locking for the bitmap.
+type Threadsafe struct {
+ bm Bitmap
+ mu sync.RWMutex
+}
+
+// TSFromData creates a new Threadsafe using the provided data.
+// If copy is true the actual slice will be used.
+func TSFromData(data []byte, copy bool) *Threadsafe {
+ return &Threadsafe{
+ bm: Bitmap(dataOrCopy(data, copy)),
+ }
+}
+
+// NewTS creates a new Threadsafe instance.
+func NewTS(length int) *Threadsafe {
+ return &Threadsafe{
+ bm: New(length),
+ }
+}
+
+// Data returns the data of the bitmap.
+// If copy is false the actual underlying slice will be returned.
+func (b *Threadsafe) Data(copy bool) []byte {
+ b.mu.RLock()
+ data := dataOrCopy(b.bm, copy)
+ b.mu.RUnlock()
+ return data
+}
+
+// Len wraps around the Len function.
+func (b Threadsafe) Len() int {
+ b.mu.RLock()
+ l := b.bm.Len()
+ b.mu.RUnlock()
+ return l
+}
+
+// Get wraps around the Get function.
+func (b Threadsafe) Get(i int) bool {
+ b.mu.RLock()
+ v := b.bm.Get(i)
+ b.mu.RUnlock()
+ return v
+}
+
+// Set wraps around the Set function.
+func (b Threadsafe) Set(i int, v bool) {
+ b.mu.Lock()
+ b.bm.Set(i, v)
+ b.mu.Unlock()
+}
+
+// Concurrent is a bitmap implementation that achieves thread-safety
+// using atomic operations along with some unsafe.
+// It performs atomic operations on 32bits of data.
+type Concurrent []byte
+
+// NewConcurrent returns a concurrent bitmap.
+// It will create a bitmap
+func NewConcurrent(l int) Concurrent {
+ remainder := l % 8
+ if remainder != 0 {
+ remainder = 1
+ }
+ return make([]byte, l/8+remainder, l/8+remainder+3)
+}
+
+// Get wraps around the Get function.
+func (c Concurrent) Get(b int) bool {
+ return Get(c, b)
+}
+
+// Set wraps around the SetAtomic function.
+func (c Concurrent) Set(b int, v bool) {
+ SetAtomic(c, b, v)
+}
+
+// Len wraps around the Len function.
+func (c Concurrent) Len() int {
+ return Len(c)
+}
+
+// Data returns the data of the bitmap.
+// If copy is false the actual underlying slice will be returned.
+func (c Concurrent) Data(copy bool) []byte {
+ return dataOrCopy(c, copy)
+}
diff --git a/vendor/github.com/boljen/go-bitmap/uintmap.go b/vendor/github.com/boljen/go-bitmap/uintmap.go
new file mode 100644
index 0000000..72cbf4a
--- /dev/null
+++ b/vendor/github.com/boljen/go-bitmap/uintmap.go
@@ -0,0 +1,32 @@
+package bitmap
+
+import (
+ "sync/atomic"
+ "unsafe"
+)
+
+// SetAtomicUint32 sets the target bit to the target value inside the uint32
+// encded bitmap.
+func SetAtomicUint32(bitmap []uint32, targetBit int, targetValue bool) {
+ targetIndex := targetBit / 32
+ BitOffset := targetBit % 32
+
+ for {
+ localValue := atomic.LoadUint32(&bitmap[targetIndex])
+ targetBytes := (*[4]byte)(unsafe.Pointer(&localValue))[:]
+ if Get(targetBytes, BitOffset) == targetValue {
+ return
+ }
+ referenceValue := localValue
+ Set(targetBytes, BitOffset, targetValue)
+ if atomic.CompareAndSwapUint32(&bitmap[targetIndex], referenceValue, localValue) {
+ break
+ }
+ }
+}
+
+// GetAtomicUint32 gets the target bit from an uint32 encoded bitmap.
+func GetAtomicUint32(bitmap []uint32, targetBit int) bool {
+ data := (*[4]byte)(unsafe.Pointer(&bitmap[targetBit/32]))[:]
+ return Get(data, targetBit%32)
+}