Merge #97

97: v0.4.0 r=japaric a=japaric

closes #32
closes #33

Co-authored-by: Jorge Aparicio <jorge@japaric.io>

1 files changed, 60 insertions, 0 deletions

diff --git a/examples/resource.rs b/examples/resource.rs
new file mode 100644
index 0000000..2777da1
--- /dev/null
+++ b/examples/resource.rs
@@ -0,0 +1,60 @@
+//! examples/resource.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+extern crate panic_semihosting;
+
+use cortex_m_semihosting::debug;
+use lm3s6965::Interrupt;
+use rtfm::app;
+
+macro_rules! println {
+    ($($tt:tt)*) => {
+        if let Ok(mut stdout) = cortex_m_semihosting::hio::hstdout() {
+            use core::fmt::Write;
+
+            writeln!(stdout, $($tt)*).ok();
+        }
+    };
+}
+
+#[app(device = lm3s6965)]
+const APP: () = {
+    // A resource
+    static mut SHARED: u32 = 0;
+
+    #[init]
+    fn init() {
+        rtfm::pend(Interrupt::UART0);
+        rtfm::pend(Interrupt::UART1);
+    }
+
+    #[idle]
+    fn idle() -> ! {
+        debug::exit(debug::EXIT_SUCCESS);
+
+        // error: `SHARED` can't be accessed from this context
+        // SHARED += 1;
+
+        loop {}
+    }
+
+    // `SHARED` can be access from this context
+    #[interrupt(resources = [SHARED])]
+    fn UART0() {
+        *resources.SHARED += 1;
+
+        println!("UART0: SHARED = {}", resources.SHARED);
+    }
+
+    // `SHARED` can be access from this context
+    #[interrupt(resources = [SHARED])]
+    fn UART1() {
+        *resources.SHARED += 1;
+
+        println!("UART1: SHARED = {}", resources.SHARED);
+    }
+};