Remove Forever, switch to static_cell.

embassy-executor/Cargo.toml

@@ -44,6 +44,7 @@ embassy-time  = { version = "0.1.0", path = "../embassy-time", optional = true}
 atomic-polyfill = "1.0.1"
 critical-section = "1.1"
 cfg-if = "1.0.0"
+static_cell = "1.0"
 
 # WASM dependencies
 wasm-bindgen = { version = "0.2.76", features = ["nightly"], optional = true }

embassy-executor/src/arch/cortex_m.rs

@@ -41,7 +41,7 @@ impl Executor {
     /// Executor instance in a place where it'll live forever and grants you mutable
     /// access. There's a few ways to do this:
     ///
-    /// - a [Forever](crate::util::Forever) (safe)
+    /// - a [StaticCell](https://docs.rs/static_cell/latest/static_cell/) (safe)
     /// - a `static mut` (unsafe)
     /// - a local variable in a function you know never returns (like `fn main() -> !`), upgrading its lifetime with `transmute`. (unsafe)
     ///

embassy-executor/src/arch/riscv32.rs

@@ -43,7 +43,7 @@ impl Executor {
     /// Executor instance in a place where it'll live forever and grants you mutable
     /// access. There's a few ways to do this:
     ///
-    /// - a [Forever](crate::util::Forever) (safe)
+    /// - a [StaticCell](https://docs.rs/static_cell/latest/static_cell/) (safe)
     /// - a `static mut` (unsafe)
     /// - a local variable in a function you know never returns (like `fn main() -> !`), upgrading its lifetime with `transmute`. (unsafe)
     ///

embassy-executor/src/arch/std.rs

@@ -40,7 +40,7 @@ impl Executor {
     /// Executor instance in a place where it'll live forever and grants you mutable
     /// access. There's a few ways to do this:
     ///
-    /// - a [Forever](crate::util::Forever) (safe)
+    /// - a [StaticCell](https://docs.rs/static_cell/latest/static_cell/) (safe)
     /// - a `static mut` (unsafe)
     /// - a local variable in a function you know never returns (like `fn main() -> !`), upgrading its lifetime with `transmute`. (unsafe)
     ///

embassy-executor/src/arch/wasm.rs

@@ -59,7 +59,7 @@ impl Executor {
     /// Executor instance in a place where it'll live forever and grants you mutable
     /// access. There's a few ways to do this:
     ///
-    /// - a [Forever](crate::util::Forever) (safe)
+    /// - a [StaticCell](https://docs.rs/static_cell/latest/static_cell/) (safe)
     /// - a `static mut` (unsafe)
     /// - a local variable in a function you know never returns (like `fn main() -> !`), upgrading its lifetime with `transmute`. (unsafe)
     pub fn start(&'static mut self, init: impl FnOnce(Spawner)) {

embassy-executor/src/arch/xtensa.rs

@@ -43,7 +43,7 @@ impl Executor {
     /// Executor instance in a place where it'll live forever and grants you mutable
     /// access. There's a few ways to do this:
     ///
-    /// - a [Forever](crate::util::Forever) (safe)
+    /// - a [StaticCell](https://docs.rs/static_cell/latest/static_cell/) (safe)
     /// - a `static mut` (unsafe)
     /// - a local variable in a function you know never returns (like `fn main() -> !`), upgrading its lifetime with `transmute`. (unsafe)
     ///

embassy-executor/src/lib.rs

@@ -67,3 +67,9 @@ pub mod raw;
 
 mod spawner;
 pub use spawner::*;
+
+/// Do not use. Used for macros and HALs only. Not covered by semver guarantees.
+#[doc(hidden)]
+pub mod _export {
+    pub use static_cell::StaticCell;
+}