diff --git a/src/uvw.hpp b/src/uvw.hpp
index 8696fdfc..83d9c71b 100644
--- a/src/uvw.hpp
+++ b/src/uvw.hpp
@@ -4,6 +4,7 @@
 #include "uvw/fs_poll.hpp"
 #include "uvw/idle.hpp"
 #include "uvw/loop.hpp"
+#include "uvw/pipe.hpp"
 #include "uvw/poll.hpp"
 #include "uvw/prepare.hpp"
 #include "uvw/signal.hpp"
diff --git a/src/uvw/pipe.hpp b/src/uvw/pipe.hpp
index 4422a240..1413ff6e 100644
--- a/src/uvw/pipe.hpp
+++ b/src/uvw/pipe.hpp
@@ -26,18 +26,15 @@ public:
         return std::shared_ptr<Pipe>{new Pipe{std::forward<Args>(args)...}};
     }
 
-    bool init(bool ipc = false) { return initialize<uv_pipe_t>(&uv_ipc_init, ipc); }
+    bool init(bool ipc = false) { return initialize<uv_pipe_t>(&uv_pipe_init, ipc); }
 
     void bind(std::string name) {
         invoke(&uv_pipe_bind, get<uv_pipe_t>(), name.data());
     }
 
     void connect(std::string name) {
-        std::weak_ptr<Pipe> weak = this->shared_from_this();
-
-        auto listener = [weak](const auto &event, details::Connect &) {
-            auto ptr = weak.lock();
-            if(ptr) { ptr->publish(event); }
+        auto listener = [ptr = this->shared_from_this()](const auto &event, details::Connect &) {
+            ptr->publish(event);
         };
 
         auto connect = loop().resource<details::Connect>();
@@ -49,8 +46,9 @@ public:
     std::string sock() const noexcept { return details::path(&uv_pipe_getsockname, get<uv_pipe_t>()); }
     std::string peer() const noexcept { return details::path(&uv_pipe_getpeername, get<uv_pipe_t>()); }
 
-    // TODO uv_pipe_pending_instances
-    // TODO uv_pipe_pending_count
+    void pending(int count) noexcept { uv_pipe_pending_instances(get<uv_pipe_t>(), count); }
+    int pending() noexcept { return uv_pipe_pending_count(get<uv_pipe_t>()); }
+
     // TODO uv_pipe_pending_type
 };
 
diff --git a/src/uvw/request.hpp b/src/uvw/request.hpp
index 5c6a3cd5..4686b3e4 100644
--- a/src/uvw/request.hpp
+++ b/src/uvw/request.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 
+#include <type_traits>
 #include <utility>
 #include <memory>
 #include <uv.h>
@@ -41,13 +42,21 @@ class Request: public Resource<T> {
 protected:
     using Resource<T>::Resource;
 
-    template<typename R, typename E, typename... A>
-    auto exec(A&&... args) {
-        auto ret = this->invoke(std::forward<A>(args)..., &execCallback<R, E>);
+    template<typename R, typename E, typename F, typename... A>
+    auto exec(F &&f, A&&... args)
+    -> std::enable_if_t<not std::is_void<std::result_of_t<F(A..., decltype(&execCallback<R, E>))>>::value, int> {
+        auto ret = this->invoke(std::forward<F>(f), std::forward<A>(args)..., &execCallback<R, E>);
         if(0 == ret) { this->leak(); }
         return ret;
     }
 
+    template<typename R, typename E, typename F, typename... A>
+    auto exec(F &&f, A&&... args)
+    -> std::enable_if_t<std::is_void<std::result_of_t<F(A..., decltype(&execCallback<R, E>))>>::value> {
+        std::forward<F>(f)(std::forward<A>(args)..., &execCallback<R, E>);
+        this->leak();
+    }
+
 public:
     void cancel() {
         this->invoke(&uv_cancel, this->template get<uv_req_t>());
diff --git a/src/uvw/stream.hpp b/src/uvw/stream.hpp
index 48825fb1..191f7f67 100644
--- a/src/uvw/stream.hpp
+++ b/src/uvw/stream.hpp
@@ -108,11 +108,8 @@ protected:
 
 public:
     void shutdown() {
-        std::weak_ptr<T> weak = this->shared_from_this();
-
-        auto listener = [weak](const auto &event, details::Shutdown &) {
-            auto ptr = weak.lock();
-            if(ptr) { ptr->publish(event); }
+        auto listener = [ptr = this->shared_from_this()](const auto &event, details::Shutdown &) {
+            ptr->publish(event);
         };
 
         auto shutdown = this->loop().template resource<details::Shutdown>();
@@ -141,11 +138,9 @@ public:
 
     void write(char *data, ssize_t len) {
         uv_buf_t bufs[] = { uv_buf_init(data, len) };
-        std::weak_ptr<T> weak = this->shared_from_this();
 
-        auto listener = [weak](const auto &event, details::Write &) {
-            auto ptr = weak.lock();
-            if(ptr) { ptr->publish(event); }
+        auto listener = [ptr = this->shared_from_this()](const auto &event, details::Write &) {
+            ptr->publish(event);
         };
 
         auto write = this->loop().template resource<details::Write>();
diff --git a/src/uvw/tcp.hpp b/src/uvw/tcp.hpp
index f68d6853..7b3c985e 100644
--- a/src/uvw/tcp.hpp
+++ b/src/uvw/tcp.hpp
@@ -85,16 +85,10 @@ public:
         typename Traits::Type addr;
         Traits::AddrFunc(ip.data(), port, &addr);
 
-        std::weak_ptr<Tcp> weak = this->shared_from_this();
-
-        auto listener = [weak](const auto &event, details::Connect &) {
-            auto ptr = weak.lock();
-
-            if(ptr) {
-                ptr->sockF = &tSock<I>;
-                ptr->peerF = &tPeer<I>;
-                ptr->publish(event);
-            }
+        auto listener = [ptr = this->shared_from_this()](const auto &event, details::Connect &) {
+            ptr->sockF = &tSock<I>;
+            ptr->peerF = &tPeer<I>;
+            ptr->publish(event);
         };
 
         auto connect = loop().resource<details::Connect>();
diff --git a/src/uvw/udp.hpp b/src/uvw/udp.hpp
index aa6270b2..b9469c31 100644
--- a/src/uvw/udp.hpp
+++ b/src/uvw/udp.hpp
@@ -151,16 +151,11 @@ public:
         Traits::AddrFunc(ip.data(), port, &addr);
 
         uv_buf_t bufs[] = { uv_buf_init(data, len) };
-        std::weak_ptr<Udp> weak = this->shared_from_this();
 
-        auto listener = [weak](const auto &event, details::Send &) {
-            auto ptr = weak.lock();
-
-            if(ptr) {
-                ptr->sockF = &tSock<I>;
-                ptr->peerF = &tPeer<I>;
-                ptr->publish(event);
-            }
+        auto listener = [ptr = this->shared_from_this()](const auto &event, details::Send &) {
+            ptr->sockF = &tSock<I>;
+            ptr->peerF = &tPeer<I>;
+            ptr->publish(event);
         };
 
         auto send = this->loop().resource<details::Send>();