From fd926ed5aed7831b16558a621b95caa7335026ef Mon Sep 17 00:00:00 2001
From: Ayush Singh <ayush@beagleboard.org>
Date: Fri, 16 Aug 2024 14:39:13 +0530
Subject: [PATCH] Implement interrupts and noInterrupts

- Using irq_lock and irq_unlock zephyr apis.

Signed-off-by: Ayush Singh <ayush@beagleboard.org>
---
 cores/arduino/zephyrCommon.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/cores/arduino/zephyrCommon.cpp b/cores/arduino/zephyrCommon.cpp
index 13611ca..cdaadf7 100644
--- a/cores/arduino/zephyrCommon.cpp
+++ b/cores/arduino/zephyrCommon.cpp
@@ -464,3 +464,18 @@ void disableInterrupt(pin_size_t pinNumber) {
     pcb->handlers[BIT(arduino_pins[pinNumber].pin)].enabled = false;
   }
 }
+
+static unsigned int irq_key = UINT_MAX;
+
+void interrupts(void) {
+  if (irq_key != UINT_MAX) {
+    irq_unlock(irq_key);
+    irq_key = UINT_MAX;
+  }
+}
+
+void noInterrupts(void) {
+  if (irq_key == UINT_MAX) {
+    irq_key = irq_lock();
+  }
+}