metrics: fix compilation with unstable, process, and rt

tokio/src/io/driver/metrics.rs

@@ -4,7 +4,7 @@
 //! these need to be available in the case when `net` is enabled but
 //! `rt` is not.
 
-cfg_not_rt_and_metrics! {
+cfg_not_rt_and_metrics_and_net! {
     #[derive(Default)]
     pub(crate) struct IoDriverMetrics {}
 
@@ -15,8 +15,10 @@ cfg_not_rt_and_metrics! {
     }
 }
 
-cfg_rt! {
-    cfg_metrics! {
-        pub(crate) use crate::runtime::IoDriverMetrics;
+cfg_net! {
+    cfg_rt! {
+        cfg_metrics! {
+            pub(crate) use crate::runtime::IoDriverMetrics;
+        }
     }
 }

tokio/src/io/driver/mod.rs

@@ -290,19 +290,21 @@ cfg_not_rt! {
     }
 }
 
-cfg_metrics! {
-   impl Handle {
-        // TODO: Remove this when handle contains `Arc<Inner>` so that we can return
-        // &IoDriverMetrics instead of using a closure.
-        //
-        // Related issue: https://github.com/tokio-rs/tokio/issues/4509
-        pub(crate) fn with_io_driver_metrics<F, R>(&self, f: F) -> Option<R>
-        where
-            F: Fn(&IoDriverMetrics) -> R,
-        {
-            self.inner().map(|inner| f(&inner.metrics))
-        }
-   }
+cfg_net! {
+    cfg_metrics! {
+       impl Handle {
+            // TODO: Remove this when handle contains `Arc<Inner>` so that we can return
+            // &IoDriverMetrics instead of using a closure.
+            //
+            // Related issue: https://github.com/tokio-rs/tokio/issues/4509
+            pub(crate) fn with_io_driver_metrics<F, R>(&self, f: F) -> Option<R>
+            where
+                F: Fn(&IoDriverMetrics) -> R,
+            {
+                self.inner().map(|inner| f(&inner.metrics))
+            }
+       }
+    }
 }
 
 impl Handle {

tokio/src/macros/cfg.rs

@@ -195,9 +195,19 @@ macro_rules! cfg_not_metrics {
     }
 }
 
-macro_rules! cfg_not_rt_and_metrics {
+macro_rules! cfg_not_rt_and_metrics_and_net {
     ($($item:item)*) => {
-        $( #[cfg(not(all(feature = "rt", all(tokio_unstable, not(loom)))))] $item )*
+        $( #[cfg(not(all(feature = "net", feature = "rt", all(tokio_unstable, not(loom)))))]$item )*
+    }
+}
+
+macro_rules! cfg_net_or_process {
+    ($($item:item)*) => {
+        $(
+            #[cfg(any(feature = "net", feature = "process"))]
+            #[cfg_attr(docsrs, doc(cfg(any(feature = "net", feature = "process"))))]
+            $item
+        )*
     }
 }