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path: root/vendor/golang.org/x/net/http2/gotrack.go
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Diffstat (limited to 'vendor/golang.org/x/net/http2/gotrack.go')
-rw-r--r--vendor/golang.org/x/net/http2/gotrack.go170
1 files changed, 0 insertions, 170 deletions
diff --git a/vendor/golang.org/x/net/http2/gotrack.go b/vendor/golang.org/x/net/http2/gotrack.go
deleted file mode 100644
index 9933c9f..0000000
--- a/vendor/golang.org/x/net/http2/gotrack.go
+++ /dev/null
@@ -1,170 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Defensive debug-only utility to track that functions run on the
-// goroutine that they're supposed to.
-
-package http2
-
-import (
- "bytes"
- "errors"
- "fmt"
- "os"
- "runtime"
- "strconv"
- "sync"
-)
-
-var DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1"
-
-type goroutineLock uint64
-
-func newGoroutineLock() goroutineLock {
- if !DebugGoroutines {
- return 0
- }
- return goroutineLock(curGoroutineID())
-}
-
-func (g goroutineLock) check() {
- if !DebugGoroutines {
- return
- }
- if curGoroutineID() != uint64(g) {
- panic("running on the wrong goroutine")
- }
-}
-
-func (g goroutineLock) checkNotOn() {
- if !DebugGoroutines {
- return
- }
- if curGoroutineID() == uint64(g) {
- panic("running on the wrong goroutine")
- }
-}
-
-var goroutineSpace = []byte("goroutine ")
-
-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
-}
-
-var littleBuf = sync.Pool{
- New: func() interface{} {
- buf := make([]byte, 64)
- return &buf
- },
-}
-
-// 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
- goto Error
-
- 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
- goto Error
- }
- case s[0] == '0':
- base = 8
- default:
- base = 10
- }
-
- default:
- err = errors.New("invalid base " + strconv.Itoa(base))
- goto Error
- }
-
- 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
- goto Error
- }
- if int(v) >= base {
- n = 0
- err = strconv.ErrSyntax
- goto Error
- }
-
- if n >= cutoff {
- // n*base overflows
- n = 1<<64 - 1
- err = strconv.ErrRange
- goto Error
- }
- n *= uint64(base)
-
- n1 := n + uint64(v)
- if n1 < n || n1 > maxVal {
- // n+v overflows
- n = 1<<64 - 1
- err = strconv.ErrRange
- goto Error
- }
- n = n1
- }
-
- return n, nil
-
-Error:
- return n, &strconv.NumError{Func: "ParseUint", Num: string(s0), Err: err}
-}
-
-// 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
-}