1 files changed, 52 insertions, 0 deletions
diff --git a/circuitpython/supervisor/shared/stack.h b/circuitpython/supervisor/shared/stack.h
new file mode 100644
index 0000000..98cc5a1
--- /dev/null
+++ b/circuitpython/supervisor/shared/stack.h
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SUPERVISOR_STACK_H
+#define MICROPY_INCLUDED_SUPERVISOR_STACK_H
+
+#include <stddef.h>
+
+#include "supervisor/memory.h"
+
+void stack_init(void);
+void stack_resize(void);
+// Actual stack location and size, may be larger than requested.
+uint32_t *stack_get_bottom(void);
+size_t stack_get_length(void);
+// Next/current requested stack size.
+void set_next_stack_size(uint32_t size);
+uint32_t get_current_stack_size(void);
+bool stack_ok(void);
+
+// Use this after any calls into a library which may use a lot of stack. This will raise a Python
+// exception when the stack has likely overwritten a portion of the heap.
+void assert_heap_ok(void);
+
+#ifndef STACK_CANARY_VALUE
+#define STACK_CANARY_VALUE 0x017829ef
+#endif
+
+#endif  // MICROPY_INCLUDED_SUPERVISOR_STACK_H