add tls

cmd/xgo/version.go

@@ -2,9 +2,9 @@ package main
 
 import "fmt"
 
-const VERSION = "1.0.20"
-const REVISION = "7ab84d83e8d847f0c2307a44866705581ba5cbbe+1"
-const NUMBER = 172
+const VERSION = "1.0.21"
+const REVISION = "60d0e314753d95e7d630a307ef991ac7bc21807e+1"
+const NUMBER = 173
 
 func getRevision() string {
 	revSuffix := ""

runtime/core/version.go

@@ -6,9 +6,9 @@ import (
 	"os"
 )
 
-const VERSION = "1.0.20"
-const REVISION = "7ab84d83e8d847f0c2307a44866705581ba5cbbe+1"
-const NUMBER = 172
+const VERSION = "1.0.21"
+const REVISION = "60d0e314753d95e7d630a307ef991ac7bc21807e+1"
+const NUMBER = 173
 
 // these fields will be filled by compiler
 const XGO_VERSION = ""

runtime/tls/hook.go

@@ -0,0 +1,50 @@
+package tls
+
+import (
+	"fmt"
+	"os"
+	"unsafe"
+)
+
+func __xgo_link_on_gonewproc(f func(g uintptr)) {
+	fmt.Fprintln(os.Stderr, "WARNING: failed to link __xgo_link_on_gonewproc(requires xgo).")
+}
+
+func __xgo_link_getcurg() unsafe.Pointer {
+	fmt.Fprintln(os.Stderr, "WARNING: failed to link __xgo_link_getcurg(requires xgo).")
+	return nil
+}
+
+func __xgo_link_on_goexit(fn func()) {
+	fmt.Fprintln(os.Stderr, "WARNING: failed to link __xgo_link_on_goexit(requires xgo).")
+}
+
+func init() {
+	__xgo_link_on_goexit(func() {
+		// clear when exit
+		g := uintptr(__xgo_link_getcurg())
+		mut.Lock()
+		localKeys := keys
+		mut.Unlock()
+		for _, loc := range localKeys {
+			loc.store.Delete(g)
+		}
+	})
+	__xgo_link_on_gonewproc(func(newg uintptr) {
+		// inherit when new goroutine
+		g := uintptr(__xgo_link_getcurg())
+		mut.Lock()
+		localKeys := keys
+		mut.Unlock()
+		for _, loc := range localKeys {
+			if !loc.inherit {
+				continue
+			}
+			val, ok := loc.store.Load(g)
+			if !ok {
+				continue
+			}
+			loc.store.Store(newg, val)
+		}
+	})
+}

runtime/tls/tls.go

@@ -0,0 +1,85 @@
+package tls
+
+import (
+	"sync"
+)
+
+var mut sync.Mutex
+var keys []*tlsKey
+
+type TLSKey interface {
+	Get() interface{}
+	GetOK() (interface{}, bool)
+	Set(v interface{})
+}
+
+type tlsKey struct {
+	name    string // for debugging purepose
+	inherit bool
+	store   sync.Map // <goroutine ptr> -> interface{}
+}
+
+var _ TLSKey = (*tlsKey)(nil)
+
+func Declare(name string) TLSKey {
+	b := &TLSBuilder{
+		name: name,
+	}
+	return b.Declare()
+}
+func DeclareInherit(name string) TLSKey {
+	b := &TLSBuilder{
+		name:    name,
+		inherit: true,
+	}
+	return b.Declare()
+}
+
+type TLSBuilder struct {
+	name    string
+	inherit bool
+}
+
+func New() *TLSBuilder {
+	return &TLSBuilder{}
+}
+
+func (c *TLSBuilder) Name(name string) *TLSBuilder {
+	c.name = name
+	return c
+}
+
+func (c *TLSBuilder) Inherit() *TLSBuilder {
+	c.inherit = true
+	return c
+}
+
+func (c *TLSBuilder) Declare() TLSKey {
+	key := &tlsKey{
+		name:    c.name,
+		inherit: c.inherit,
+	}
+	mut.Lock()
+	keys = append(keys, key)
+	mut.Unlock()
+	return key
+}
+
+func (c *tlsKey) Get() interface{} {
+	key := uintptr(__xgo_link_getcurg())
+	val, ok := c.store.Load(key)
+	if !ok {
+		return nil
+	}
+	return val
+}
+
+func (c *tlsKey) GetOK() (interface{}, bool) {
+	key := uintptr(__xgo_link_getcurg())
+	return c.store.Load(key)
+}
+
+func (c *tlsKey) Set(v interface{}) {
+	key := uintptr(__xgo_link_getcurg())
+	c.store.Store(key, v)
+}

runtime/tls/tls_test.go

@@ -0,0 +1,56 @@
+package tls_test
+
+import (
+	"testing"
+
+	"github.com/xhd2015/xgo/runtime/tls"
+)
+
+var a = tls.Declare("a")
+var b = tls.DeclareInherit("b")
+
+func TestDeclareLocal(t *testing.T) {
+	a.Set(1)
+
+	var v1 interface{}
+	done := make(chan struct{})
+	go func() {
+		v1 = a.Get()
+		close(done)
+	}()
+	<-done
+
+	v2 := a.Get()
+
+	if v1 != nil {
+		t.Fatalf("expect sub goroutine get nil, actual: %v", v1)
+	}
+
+	if i := v2.(int); i != 1 {
+		t.Fatalf("expect current goroutine get %d, actual: %d", 1, i)
+	}
+}
+
+func TestInerhitLocal(t *testing.T) {
+	b.Set(1)
+
+	var v1 interface{}
+	done := make(chan struct{})
+	go func() {
+		v1 = b.Get()
+		close(done)
+	}()
+	<-done
+
+	v2 := b.Get()
+
+	if v1 == nil {
+		t.Fatalf("expect sub goroutine inherit b, actual: %v", v1)
+	}
+	if i := v1.(int); i != 1 {
+		t.Fatalf("expect sub goroutine get %d, actual: %d", 1, i)
+	}
+	if i := v2.(int); i != 1 {
+		t.Fatalf("expect current goroutine get %d, actual: %d", 1, i)
+	}
+}