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authorgVisor bot <gvisor-bot@google.com>2020-12-05 03:10:35 +0000
committergVisor bot <gvisor-bot@google.com>2020-12-05 03:10:35 +0000
commit84ffd9bfe74f39dfacd655b511cd336ba08e2f21 (patch)
tree24f30a13729159447ddf49e5f2be20d489735765 /pkg/sync
parent5dc7ccb99bcf8721bffc1f806b7c4c6a66b51416 (diff)
parent8a45c8161601e62faa0d448ff6d5bc0604ea406f (diff)
Merge release-20201130.0-44-g8a45c8161 (automated)
Diffstat (limited to 'pkg/sync')
-rw-r--r--pkg/sync/seqcount.go34
1 files changed, 0 insertions, 34 deletions
diff --git a/pkg/sync/seqcount.go b/pkg/sync/seqcount.go
index 2c5d3df99..1f025f33c 100644
--- a/pkg/sync/seqcount.go
+++ b/pkg/sync/seqcount.go
@@ -6,8 +6,6 @@
package sync
import (
- "fmt"
- "reflect"
"sync/atomic"
)
@@ -27,9 +25,6 @@ import (
// - SeqCount may be more flexible: correct use of SeqCount.ReadOk allows other
// operations to be made atomic with reads of SeqCount-protected data.
//
-// - SeqCount may be less flexible: as of this writing, SeqCount-protected data
-// cannot include pointers.
-//
// - SeqCount is more cumbersome to use; atomic reads of SeqCount-protected
// data require instantiating function templates using go_generics (see
// seqatomic.go).
@@ -128,32 +123,3 @@ func (s *SeqCount) EndWrite() {
panic("SeqCount.EndWrite outside writer critical section")
}
}
-
-// PointersInType returns a list of pointers reachable from values named
-// valName of the given type.
-//
-// PointersInType is not exhaustive, but it is guaranteed that if typ contains
-// at least one pointer, then PointersInTypeOf returns a non-empty list.
-func PointersInType(typ reflect.Type, valName string) []string {
- switch kind := typ.Kind(); kind {
- case reflect.Bool, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr, reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128:
- return nil
-
- case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice, reflect.String, reflect.UnsafePointer:
- return []string{valName}
-
- case reflect.Array:
- return PointersInType(typ.Elem(), valName+"[]")
-
- case reflect.Struct:
- var ptrs []string
- for i, n := 0, typ.NumField(); i < n; i++ {
- field := typ.Field(i)
- ptrs = append(ptrs, PointersInType(field.Type, fmt.Sprintf("%s.%s", valName, field.Name))...)
- }
- return ptrs
-
- default:
- return []string{fmt.Sprintf("%s (of type %s with unknown kind %s)", valName, typ, kind)}
- }
-}