Require threads on all platforms.

Author: spacejam

CHANGELOG.md

@@ -23,6 +23,7 @@
 
 ## Breaking Changes
 
+* #1399 Thread support is now required on all platforms.
 * #1135 The "no_metrics" anti-feature has been replaced with
   the "metrics" positive feature.
 * #1178 the `Event` enum has become a unified struct that allows

src/context.rs

@@ -12,19 +12,7 @@ pub struct Context {
     /// When the last high-level reference is dropped, it
     /// should trigger all background threads to clean
     /// up synchronously.
-    #[cfg(all(
-        not(miri),
-        any(
-            windows,
-            target_os = "linux",
-            target_os = "macos",
-            target_os = "dragonfly",
-            target_os = "freebsd",
-            target_os = "openbsd",
-            target_os = "netbsd",
-            target_os = "ios",
-        )
-    ))]
+    #[cfg(not(miri))]
     pub(crate) flusher: Arc<Mutex<Option<flusher::Flusher>>>,
     #[doc(hidden)]
     pub pagecache: PageCache,
@@ -47,19 +35,7 @@ impl Context {
         Ok(Self {
             config,
             pagecache,
-            #[cfg(all(
-                not(miri),
-                any(
-                    windows,
-                    target_os = "linux",
-                    target_os = "macos",
-                    target_os = "dragonfly",
-                    target_os = "freebsd",
-                    target_os = "openbsd",
-                    target_os = "netbsd",
-                    target_os = "ios",
-                )
-            ))]
+            #[cfg(not(miri))]
             flusher: Arc::new(parking_lot::Mutex::new(None)),
         })
     }

src/db.rs

@@ -53,19 +53,7 @@ impl Db {
 
         let context = Context::start(config)?;
 
-        #[cfg(all(
-            not(miri),
-            any(
-                windows,
-                target_os = "linux",
-                target_os = "macos",
-                target_os = "dragonfly",
-                target_os = "freebsd",
-                target_os = "openbsd",
-                target_os = "netbsd",
-                target_os = "ios",
-            )
-        ))]
+        #[cfg(not(miri))]
         {
             let flusher_pagecache = context.pagecache.clone();
             let flusher = context.flush_every_ms.map(move |fem| {

src/lib.rs

@@ -225,19 +225,7 @@ pub mod fail;
 #[cfg(feature = "docs")]
 pub mod doc;
 
-#[cfg(all(
-    not(miri),
-    any(
-        windows,
-        target_os = "linux",
-        target_os = "macos",
-        target_os = "dragonfly",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "netbsd",
-        target_os = "ios",
-    )
-))]
+#[cfg(not(miri))]
 mod flusher;
 
 #[cfg(feature = "event_log")]

src/pagecache/mod.rs

@@ -1100,19 +1100,7 @@ impl PageCacheInner {
     /// move a page. Returns Ok(false) if there were no pages
     /// to GC. Returns an Err if we encountered an IO problem
     /// while performing this GC.
-    #[cfg(all(
-        not(miri),
-        any(
-            windows,
-            target_os = "linux",
-            target_os = "macos",
-            target_os = "dragonfly",
-            target_os = "freebsd",
-            target_os = "openbsd",
-            target_os = "netbsd",
-            target_os = "ios",
-        )
-    ))]
+    #[cfg(not(miri))]
     pub(crate) fn attempt_gc(&self) -> Result<bool> {
         let guard = pin();
         let cc = concurrency_control::read();

src/threadpool.rs

@@ -4,19 +4,7 @@ use std::sync::Arc;
 
 use crate::{OneShot, Result};
 
-#[cfg(all(
-    not(miri),
-    any(
-        windows,
-        target_os = "linux",
-        target_os = "macos",
-        target_os = "dragonfly",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "netbsd",
-        target_os = "ios",
-    )
-))]
+#[cfg(not(miri))]
 mod queue {
     use std::{
         cell::RefCell,
@@ -220,19 +208,7 @@ where
     spawn_to(work, &queue::BLOCKING_QUEUE)
 }
 
-#[cfg(any(
-    miri,
-    not(any(
-        windows,
-        target_os = "linux",
-        target_os = "macos",
-        target_os = "dragonfly",
-        target_os = "freebsd",
-        target_os = "openbsd",
-        target_os = "netbsd",
-        target_os = "ios",
-    ))
-))]
+#[cfg(miri)]
 mod queue {
     /// This is the polyfill that just executes things synchronously.
     use crate::{OneShot, Result};