diff --git a/gls/procid.go b/gls/procid.go
new file mode 100644
index 0000000..0de9da7
--- /dev/null
+++ b/gls/procid.go
@@ -0,0 +1,35 @@
+package gls
+
+import (
+	"unsafe"
+	"github.com/v2pro/plz/reflect2"
+)
+
+// offset for go1.19
+var mOffset uintptr = 48
+var midOffset uintptr = 72
+
+func init() {
+	gType := reflect2.TypeByName("runtime.g").(reflect2.StructType)
+	if gType == nil {
+		panic("failed to get runtime.g type")
+	}
+
+	mField := gType.FieldByName("m")
+	mOffset = mField.Offset()
+
+	mType := reflect2.TypeByName("runtime.m").(reflect2.StructType)
+	if mType == nil {
+		panic("failed to get runtime.m type")
+	}
+	midField := mType.FieldByName("procid")
+	midOffset = midField.Offset()
+}
+
+// ProcID returns the thread id of current thread
+func ProcID() uint64 {
+	g := getg()
+	p_m := (*uintptr)(unsafe.Pointer(g + mOffset))
+	p_mid := (*uint64)(unsafe.Pointer(*p_m + midOffset))
+	return *p_mid
+}