use the sync_* functions exportet by emper

src/emper-echo-server.c

@@ -27,7 +27,7 @@ ssize_t send_all(int fd, const void* buf, size_t len) {
 	size_t bytes_written = 0;
 	while (bytes_written < len) {
 #ifdef USE_ASYNC_IO
-		ssize_t new_bytes_written = async_send(fd, buf, len - bytes_written);
+		ssize_t new_bytes_written = sync_send(fd, buf, len - bytes_written);
 #else
 		ssize_t new_bytes_written = send(fd, buf, len - bytes_written, 0);
 #endif
@@ -49,7 +49,7 @@ void client_func(void* arg) {
 	char buf[BUF_MAX];
 	for (;;) {
 #ifdef USE_ASYNC_IO
-		ssize_t bytes_recv = async_recv(client_fd, (void*)&buf, BUF_MAX);
+		ssize_t bytes_recv = sync_recv(client_fd, (void*)&buf, BUF_MAX);
 #else
 		ssize_t bytes_recv = recv(client_fd, (void*)&buf, BUF_MAX);
 #endif
@@ -109,7 +109,7 @@ static void welcome_func() {
 
 	for (;;) {
 #ifdef USE_ASYNC_IO
-		int client_fd = async_accept(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr));
+		int client_fd = sync_accept(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr));
 #else
 		socklen_t address_len = sizeof(servaddr);
 		int client_fd = accept(sockfd, (struct sockaddr*)&servaddr, &address_len);