Update critical-section crate.

Author: reitermarkus

Cargo.toml

@@ -18,7 +18,7 @@ links = "cortex-m"  # prevent multiple versions of this crate to be linked toget
 
 [dependencies]
 bitfield = "0.13.2"
-critical-section = { version = "0.2", optional = true }
+critical-section = { version = "0.3", optional = true }
 embedded-hal = "0.2.4"
 volatile-register = "0.2.0"
 
@@ -32,7 +32,7 @@ cm7 = []
 cm7-r0p1 = ["cm7"]
 linker-plugin-lto = []
 std = []
-single-core-critical-section = ["critical-section", "critical-section/custom-impl"]
+single-core-critical-section = ["critical-section", "critical-section/token-bool"]
 
 [workspace]
 members = [
@@ -59,4 +59,4 @@ targets = [
 
 [patch.crates-io]
 # See https://github.com/embassy-rs/critical-section/pull/13.
-critical-section = { git = "https://github.com/reitermarkus/critical-section", branch = "cortex-m" }
+critical-section = { git = "https://github.com/embassy-rs/critical-section" }

cortex-m-semihosting/Cargo.toml

@@ -21,4 +21,4 @@ no-semihosting = []
 
 [dependencies]
 cortex-m = { path = "..", version = ">= 0.5.8, < 0.8" }
-critical-section = "0.2"
+critical-section = "0.3"

src/critical_section.rs

@@ -1,28 +1,27 @@
 #[cfg(all(cortex_m, feature = "single-core-critical-section"))]
 mod single_core_critical_section {
+    use critical_section::{set_impl, Impl, RawToken};
+
     use crate::interrupt;
     use crate::register::primask::{self, Primask};
 
-    struct CriticalSection;
-    critical_section::custom_impl!(CriticalSection);
-
-    const TOKEN_IGNORE: u8 = 0;
-    const TOKEN_REENABLE: u8 = 1;
+    struct SingleCoreCriticalSection;
+    set_impl!(CriticalSection);
 
-    unsafe impl critical_section::Impl for CriticalSection {
-        unsafe fn acquire() -> u8 {
+    unsafe impl Impl for SingleCoreCriticalSection {
+        unsafe fn acquire() -> RawToken {
             match primask::read() {
                 Primask::Active => {
                     interrupt::disable();
-                    TOKEN_REENABLE
+                    true
                 }
-                Primask::Inactive => TOKEN_IGNORE,
+                Primask::Inactive => false,
             }
         }
 
-        unsafe fn release(token: u8) {
+        unsafe fn release(primask_was_active: RawToken) {
             // Only re-enable interrupts if they were enabled before the critical section.
-            if token == TOKEN_REENABLE {
+            if primask_was_active {
                 interrupt::enable()
             }
         }

testsuite/Cargo.toml

@@ -13,7 +13,7 @@ semihosting = ["cortex-m-semihosting", "minitest/semihosting"]
 cortex-m-rt.path = "../cortex-m-rt"
 cortex-m.path = ".."
 minitest.path = "minitest"
-critical-section = "0.2"
+critical-section = "0.3"
 
 [dependencies.rtt-target]
 version = "0.3.1"