diff --git a/src/libckpool.c b/src/libckpool.c
index dd0bd1c4..572c860c 100644
--- a/src/libckpool.c
+++ b/src/libckpool.c
@@ -258,6 +258,67 @@ void _ck_wunlock(cklock_t *lock, const char *file, const char *func, const int l
 	_mutex_unlock(&lock->mutex, file, func, line);
 }
 
+void _cksem_init(sem_t *sem, const char *file, const char *func, const int line)
+{
+	int ret;
+	if ((ret = sem_init(sem, 0, 0)))
+		quitfrom(1, file, func, line, "Failed to sem_init ret=%d errno=%d", ret, errno);
+}
+
+void _cksem_post(sem_t *sem, const char *file, const char *func, const int line)
+{
+	if (unlikely(sem_post(sem)))
+		quitfrom(1, file, func, line, "Failed to sem_post errno=%d sem=0x%p", errno, sem);
+}
+
+void _cksem_wait(sem_t *sem, const char *file, const char *func, const int line)
+{
+retry:
+	if (unlikely(sem_wait(sem))) {
+		if (errno == EINTR)
+			goto retry;
+		quitfrom(1, file, func, line, "Failed to sem_wait errno=%d sem=0x%p", errno, sem);
+	}
+}
+
+int _cksem_mswait(sem_t *sem, int ms, const char *file, const char *func, const int line)
+{
+	ts_t abs_timeout, ts_now;
+	tv_t tv_now;
+	int ret;
+
+	tv_time(&tv_now);
+	tv_to_ts(&ts_now, &tv_now);
+	ms_to_ts(&abs_timeout, ms);
+retry:
+	timeraddspec(&abs_timeout, &ts_now);
+	ret = sem_timedwait(sem, &abs_timeout);
+
+	if (ret) {
+		if (likely(errno == ETIMEDOUT))
+			return ETIMEDOUT;
+		if (errno == EINTR)
+			goto retry;
+		quitfrom(1, file, func, line, "Failed to sem_timedwait errno=%d sem=0x%p", errno, sem);
+	}
+	return 0;
+}
+
+void cksem_reset(sem_t *sem)
+{
+	int ret;
+
+	do {
+		ret = sem_trywait(sem);
+		if (unlikely(ret < 0 && (errno == EINTR)))
+			ret = 0;
+	} while (!ret);
+}
+
+void cksem_destroy(sem_t *sem)
+{
+	sem_destroy(sem);
+}
 
 bool extract_sockaddr(char *url, char **sockaddr_url, char **sockaddr_port)
 {
diff --git a/src/libckpool.h b/src/libckpool.h
index c59b24f7..b3251370 100644
--- a/src/libckpool.h
+++ b/src/libckpool.h
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <syslog.h>
+#include <semaphore.h>
 
 #if HAVE_BYTESWAP_H
 # include <byteswap.h>
@@ -356,6 +357,18 @@ void _ck_dlock(cklock_t *lock, const char *file, const char *func, const int lin
 void _ck_runlock(cklock_t *lock, const char *file, const char *func, const int line);
 void _ck_wunlock(cklock_t *lock, const char *file, const char *func, const int line);
 
+void _cksem_init(sem_t *sem, const char *file, const char *func, const int line);
+void _cksem_post(sem_t *sem, const char *file, const char *func, const int line);
+void _cksem_wait(sem_t *sem, const char *file, const char *func, const int line);
+int _cksem_mswait(sem_t *sem, int ms, const char *file, const char *func, const int line);
+void cksem_reset(sem_t *sem);
+void cksem_destroy(sem_t *sem);
+
+#define cksem_init(_sem) _cksem_init(_sem, __FILE__, __func__, __LINE__)
+#define cksem_post(_sem) _cksem_post(_sem, __FILE__, __func__, __LINE__)
+#define cksem_wait(_sem) _cksem_wait(_sem, __FILE__, __func__, __LINE__)
+#define cksem_mswait(_sem, _timeout) _cksem_mswait(_sem, _timeout, __FILE__, __func__, __LINE__)
+
 static inline bool sock_connecting(void)
 {
 	return errno == EINPROGRESS;