some initial code

haza.go

@@ -0,0 +1,77 @@
+package haza
+
+import "sync"
+import "unsafe"
+
+type LogLevel int
+type LogMask int
+
+const (
+	LOG_DEBUG LogLevel = 1 << iota
+	LOG_INFO
+	LOG_WARN
+	LOG_ERROR
+)
+
+const LOG_ALL LogMask = LogMask(LOG_DEBUG | LOG_INFO | LOG_WARN | LOG_ERROR)
+const LOG_NONE LogMask = LogMask(0)
+
+type Named struct {
+	name string
+}
+
+type Logger interface {
+	Write(id string, level LogLevel, fmtstr string, args ...interface{})
+	WriteWithCallDepth(id string, level LogLevel, call_depth int, fmtstr string, args ...interface{})
+	Rotate()
+	Close()
+}
+
+type Service interface {
+	RunTask(wg *sync.WaitGroup) // blocking. run the actual task loop. it must call wg.Done() upon exit from itself.
+	StartService(data interface{}) // non-blocking. spin up a service. it may be invokded multiple times for multiple instances
+	StopServices() // non-blocking. send stop request to all services spun up
+	FixServices() // do some fixup as needed
+	WaitForTermination() // blocking. must wait until all services are stopped
+	WriteLog(id string, level LogLevel, fmtstr string, args ...interface{})
+}
+
+// ---------------------------------------------------------
+
+func (n *Named) SetName(name string) {
+	n.name = name
+}
+
+func (n *Named) Name() string {
+	return n.name
+}
+
+// ---------------------------------------------------------
+
+var _is_big_endian bool = is_big_endian()
+
+func is_big_endian() bool {
+	var v uint16
+	v = 1
+	return *(*byte)(unsafe.Pointer(&v)) == 0;
+}
+
+func Hton16(v uint16) uint16 {
+	if _is_big_endian { return v }
+	return (v << 8) | (v >> 8)
+}
+
+func Ntoh16(v uint16) uint16 {
+	if _is_big_endian { return v }
+	return (v << 8) | (v >> 8)
+}
+
+func Hton32(v uint32) uint32 {
+	if _is_big_endian { return v }
+	return ((v >> 24) & 0xFF) | ((v >> 8) & 0xFF00) | ((v << 8) & 0xFF0000) | ((v << 24) & 0xFF000000)
+}
+
+func Ntoh32(v uint32) uint32 {
+	if _is_big_endian { return v }
+	return ((v >> 24) & 0xFF) | ((v >> 8) & 0xFF00) | ((v << 8) & 0xFF0000) | ((v << 24) & 0xFF000000)
+}