Vendor things

third-party/vendor/mio/src/macros.rs

@@ -0,0 +1,98 @@
+//! Macros to ease conditional code based on enabled features.
+
+// Depending on the features not all macros are used.
+#![allow(unused_macros)]
+
+/// The `os-poll` feature is enabled.
+macro_rules! cfg_os_poll {
+    ($($item:item)*) => {
+        $(
+            #[cfg(feature = "os-poll")]
+            #[cfg_attr(docsrs, doc(cfg(feature = "os-poll")))]
+            $item
+        )*
+    }
+}
+
+/// The `os-poll` feature is disabled.
+macro_rules! cfg_not_os_poll {
+    ($($item:item)*) => {
+        $(
+            #[cfg(not(feature = "os-poll"))]
+            $item
+        )*
+    }
+}
+
+/// The `os-ext` feature is enabled.
+macro_rules! cfg_os_ext {
+    ($($item:item)*) => {
+        $(
+            #[cfg(feature = "os-ext")]
+            #[cfg_attr(docsrs, doc(cfg(feature = "os-ext")))]
+            $item
+        )*
+    }
+}
+
+/// The `net` feature is enabled.
+macro_rules! cfg_net {
+    ($($item:item)*) => {
+        $(
+            #[cfg(feature = "net")]
+            #[cfg_attr(docsrs, doc(cfg(feature = "net")))]
+            $item
+        )*
+    }
+}
+
+/// One of the features enabled that needs `IoSource`. That is `net` or `os-ext`
+/// on Unix (for `pipe`).
+macro_rules! cfg_io_source {
+    ($($item:item)*) => {
+        $(
+            #[cfg(any(feature = "net", all(unix, feature = "os-ext")))]
+            #[cfg_attr(docsrs, doc(cfg(any(feature = "net", all(unix, feature = "os-ext")))))]
+            $item
+        )*
+    }
+}
+
+/// The `os-ext` feature is enabled, or one of the features that need `os-ext`.
+macro_rules! cfg_any_os_ext {
+    ($($item:item)*) => {
+        $(
+            #[cfg(any(feature = "os-ext", feature = "net"))]
+            #[cfg_attr(docsrs, doc(cfg(any(feature = "os-ext", feature = "net"))))]
+            $item
+        )*
+    }
+}
+
+macro_rules! trace {
+    ($($t:tt)*) => {
+        log!(trace, $($t)*)
+    }
+}
+
+macro_rules! warn {
+    ($($t:tt)*) => {
+        log!(warn, $($t)*)
+    }
+}
+
+macro_rules! error {
+    ($($t:tt)*) => {
+        log!(error, $($t)*)
+    }
+}
+
+macro_rules! log {
+    ($level: ident, $($t:tt)*) => {
+        #[cfg(feature = "log")]
+        { log::$level!($($t)*) }
+        // Silence unused variables warnings.
+        #[cfg(not(feature = "log"))]
+        { if false { let _ = ( $($t)* ); } }
+    }
+}