restore SIGNAL_WORK_THREAD_MODE

2022-11-12 10:56:49 +01:00 · 2022-11-12 10:56:49 +01:00 · e70ae71ecc
commit e70ae71ecc
parent 6e1120e17e
1 changed files with 6 additions and 1 deletions
--- a/embassy-executor/src/arch/riscv32.rs
+++ b/embassy-executor/src/arch/riscv32.rs
@ -54,7 +54,12 @@ impl Executor {
        loop {
            unsafe {
                self.inner.poll();
-                core::arch::asm!("wfi");
+                // we do not care about race conditions between the load and store operations, interrupts
+                // will only set this value to true.
+                // if there is work to do, loop back to polling
+                if !SIGNAL_WORK_THREAD_MODE.fetch_and(false, Ordering::SeqCst) {
+                    core::arch::asm!("wfi");
+                }
            }
        }
    }