diff --git a/libs/pthread.go b/libs/pthread.go
index 4d4dab6..9aa7784 100644
--- a/libs/pthread.go
+++ b/libs/pthread.go
@@ -19,11 +19,6 @@ func init() {
 		onceT := types.NamedTGo("pthread_once_t", "sync.Once", c.MethStructT(map[string]*types.FuncType{
 			"Do": c.FuncTT(nil, c.FuncTT(nil)),
 		}))
-		threadT := types.NamedTGo("pthread_t", "pthread.Thread", c.MethStructT(map[string]*types.FuncType{
-			"Join":        c.FuncTT(intT, c.PtrT(retT)),
-			"TimedJoinNP": c.FuncTT(intT, c.PtrT(retT), c.PtrT(timespecT)),
-		}))
-		threadAttrT := types.NamedTGo("pthread_attr_t", "pthread.Attr", c.MethStructT(map[string]*types.FuncType{}))
 		mutexAttrT := types.NamedTGo("pthread_mutexattr_t", "pthread.MutexAttr", c.MethStructT(map[string]*types.FuncType{
 			"Init":    c.FuncTT(intT),
 			"SetType": c.FuncTT(intT, intT),
@@ -32,11 +27,23 @@ func init() {
 		mutexT := types.NamedTGo("pthread_mutex_t", "pthread.Mutex", c.MethStructT(map[string]*types.FuncType{
 			"Init":      c.FuncTT(intT, c.PtrT(mutexAttrT)),
 			"Destroy":   c.FuncTT(intT),
-			"Lock":      c.FuncTT(intT),
+			"CLock":     c.FuncTT(intT),
 			"TryLock":   c.FuncTT(intT),
 			"TimedLock": c.FuncTT(intT, c.PtrT(timespecT)),
-			"Unlock":    c.FuncTT(intT),
+			"CUnlock":   c.FuncTT(intT),
+		}))
+		condAttrT := types.NamedTGo("pthread_condattr_t", "pthread.CondAttr", types.StructT(nil))
+		condT := types.NamedTGo("pthread_cond_t", "sync.Cond", types.StructT([]*types.Field{
+			{Name: types.NewIdent("L", c.PtrT(mutexT))},
+			{Name: types.NewIdent("Wait", c.FuncTT(nil))},
+			{Name: types.NewIdent("Signal", c.FuncTT(nil))},
+			{Name: types.NewIdent("Broadcast", c.FuncTT(nil))},
 		}))
+		threadT := types.NamedTGo("pthread_t", "pthread.Thread", c.MethStructT(map[string]*types.FuncType{
+			"Join":        c.FuncTT(intT, c.PtrT(retT)),
+			"TimedJoinNP": c.FuncTT(intT, c.PtrT(retT), c.PtrT(timespecT)),
+		}))
+		threadAttrT := types.NamedTGo("pthread_attr_t", "pthread.Attr", c.MethStructT(map[string]*types.FuncType{}))
 		return &Library{
 			Imports: map[string]string{
 				"sync":    "sync",
@@ -46,6 +53,8 @@ func init() {
 				"pthread_t_":          threadT,
 				"pthread_t":           c.PtrT(threadT),
 				"pthread_once_t":      onceT,
+				"pthread_cond_t":      condT,
+				"pthread_condattr_t":  condAttrT,
 				"pthread_attr_t":      threadAttrT,
 				"pthread_mutex_t":     mutexT,
 				"pthread_mutexattr_t": mutexAttrT,
@@ -53,6 +62,8 @@ func init() {
 			Idents: map[string]*types.Ident{
 				"PTHREAD_MUTEX_RECURSIVE": c.NewIdent("PTHREAD_MUTEX_RECURSIVE", "pthread.MUTEX_RECURSIVE", pthread.MUTEX_RECURSIVE, gintT),
 				"pthread_create":          c.NewIdent("pthread_create", "pthread.Create", pthread.Create, c.FuncTT(intT, c.PtrT(c.PtrT(threadT)), c.PtrT(threadAttrT), c.FuncTT(retT, argT), argT)),
+				"pthread_cond_init":       c.NewIdent("pthread_cond_init", "pthread.CondInit", pthread.CondInit, c.FuncTT(intT, c.PtrT(condT), c.PtrT(condAttrT))),
+				"pthread_cond_destroy":    c.NewIdent("pthread_cond_destroy", "pthread.CondFree", pthread.CondFree, c.FuncTT(intT, c.PtrT(condT))),
 			},
 			// TODO
 			Header: `
@@ -61,6 +72,8 @@ func init() {
 
 const _cxgo_go_int PTHREAD_MUTEX_RECURSIVE = 1;
 
+typedef struct pthread_mutex_t pthread_mutex_t;
+
 typedef struct pthread_attr_t {} pthread_attr_t;
 
 typedef struct {
@@ -69,17 +82,23 @@ typedef struct {
 #define PTHREAD_ONCE_INIT {0}
 #define pthread_once(o,f) (o)->Do(f)
 
-typedef struct {} pthread_cond_t;
+typedef struct {
+	pthread_mutex_t* L;
+	void (*Wait)(void);
+	void (*Signal)(void);
+	void (*Broadcast)(void);
+} pthread_cond_t;
 typedef struct {} pthread_condattr_t;
 int pthread_cond_destroy(pthread_cond_t *cond);
 int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t * attr);
-int pthread_cond_broadcast(pthread_cond_t *cond);
-int pthread_cond_signal(pthread_cond_t *cond);
+#define pthread_cond_broadcast(c) (c)->Broadcast()
+#define pthread_cond_signal(c) (c)->Signal()
 #define PTHREAD_COND_INITIALIZER {0}
 
 typedef struct {} pthread_mutex_t;
 int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * mutex, const struct timespec * abstime);
-int pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex);
+//int pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t * mutex);
+#define pthread_cond_wait(c,m) {(c)->L = m; (c)->Wait();}
 
 typedef struct{
 	_cxgo_sint32 (*Join)(void **retval);
@@ -101,16 +120,16 @@ typedef struct pthread_mutexattr_t {
 typedef struct pthread_mutex_t {
 	_cxgo_sint32 (*Destroy)(void);
 	_cxgo_sint32 (*Init)(const pthread_mutexattr_t *restrict attr);
-	_cxgo_sint32 (*Lock)(void);
+	_cxgo_sint32 (*CLock)(void);
 	_cxgo_sint32 (*TryLock)(void);
-	_cxgo_sint32 (*Unlock)(void);
+	_cxgo_sint32 (*CUnlock)(void);
 	_cxgo_sint32 (*TimedLock)(const struct timespec *restrict abstime);
 } pthread_mutex_t;
 #define pthread_mutex_destroy(mutex) ((pthread_mutex_t*)mutex)->Destroy()
 #define pthread_mutex_init(mutex, attr) ((pthread_mutex_t*)mutex)->Init(attr)
-#define pthread_mutex_lock(mutex) ((pthread_mutex_t*)mutex)->Lock()
+#define pthread_mutex_lock(mutex) ((pthread_mutex_t*)mutex)->CLock()
 #define pthread_mutex_trylock(mutex) ((pthread_mutex_t*)mutex)->TryLock()
-#define pthread_mutex_unlock(mutex) ((pthread_mutex_t*)mutex)->Unlock()
+#define pthread_mutex_unlock(mutex) ((pthread_mutex_t*)mutex)->CUnlock()
 #define pthread_mutex_timedlock(mutex, abstime) ((pthread_mutex_t*)mutex)->TimedLock(abstime)
 
 #define pthread_join(thread, retval) ((pthread_t_*)thread)->Join(retval)
diff --git a/libs/types.go b/libs/types.go
index 5f5223c..7e43776 100644
--- a/libs/types.go
+++ b/libs/types.go
@@ -128,6 +128,12 @@ func (c *Env) checkType(t1 reflect.Type, t2 types.Type) error {
 			}
 		}
 		return nil
+	case reflect.Struct:
+		_, ok := types.Unwrap(t2).(*types.StructType)
+		if !ok {
+			return fmt.Errorf("expected struct, got: %T", t2)
+		}
+		return nil
 	default:
 		return fmt.Errorf("unsupported type: %v (%v)", t1, t1.Kind())
 	}
diff --git a/runtime/pthread/pthread.go b/runtime/pthread/pthread.go
index 397ba58..7998044 100644
--- a/runtime/pthread/pthread.go
+++ b/runtime/pthread/pthread.go
@@ -49,24 +49,24 @@ func (m *MutexAttr) Destroy() int32 {
 }
 
 type Mutex struct {
-	mu *sync.Mutex
+	*sync.Mutex
 }
 
 func (m *Mutex) Init(attr *MutexAttr) int32 {
 	if attr.typ == MUTEX_RECURSIVE {
 		// FIXME
 	}
-	m.mu = new(sync.Mutex)
+	m.Mutex = new(sync.Mutex)
 	return 0
 }
 
 func (m *Mutex) Destroy() int32 {
-	m.mu = nil
+	m.Mutex = nil
 	return 0
 }
 
-func (m *Mutex) Lock() int32 {
-	m.mu.Lock()
+func (m *Mutex) CLock() int32 {
+	m.Mutex.Lock()
 	return 0
 }
 
@@ -78,7 +78,23 @@ func (m *Mutex) TimedLock(t *libc.TimeSpec) int32 {
 	panic("TODO")
 }
 
-func (m *Mutex) Unlock() int32 {
-	m.mu.Unlock()
+func (m *Mutex) CUnlock() int32 {
+	m.Mutex.Unlock()
+	return 0
+}
+
+type CondAttr struct {
+	// FIXME
+}
+
+func CondInit(c *sync.Cond, attr *CondAttr) int32 {
+	if attr != nil {
+		panic("TODO")
+	}
+	*c = *sync.NewCond(nil)
+	return 0
+}
+
+func CondFree(c *sync.Cond) int32 {
 	return 0
 }