general core health status: KISS api

cores/esp8266/Arduino.h

@@ -38,6 +38,7 @@ extern "C" {
 #include "esp8266_peri.h"
 #include "twi.h"
 #include "core_esp8266_features.h"
+#include "core_health.h"
 
 #define HIGH 0x1
 #define LOW  0x0

cores/esp8266/core_health.cpp

@@ -0,0 +1,23 @@
+
+#include <stdint.h>
+#include <core_health_setter.h>
+
+static uint32_t health = 0;
+
+int core_condition_is_fatal (void)
+{
+    return health > ((((decltype(health))1) << core_warn_last) - 1);
+}
+
+int core_condition_has (core_condition_e disease)
+{
+    decltype(health) bits = ((decltype(health))1) << disease;
+    int badmood = !!(health & bits);
+    health &= ~bits;
+    return badmood;
+}
+
+void core_condition_got (core_condition_e disease)
+{
+    health |= ((decltype(health))1) << disease;
+}

cores/esp8266/core_health.h

@@ -0,0 +1,34 @@
+
+#ifndef __CORE_HEALTH_H
+#define __CORE_HEALTH_H
+
+/*
+   These 2 functions reflect a general health status
+   User can check them anytime
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum {
+    core_warn_heap = 0,
+    core_warn_uart = 1,
+    core_warn_last = 1,
+
+    core_fatal_string = 16,
+    core_fatal_axtls = 17,
+} core_condition_e;
+
+// returns 0 if condition is not fatal
+int core_condition_is_fatal (void);
+
+// returns 0 if core hasn't got this disease
+// returns 1 otherwise, and cure it
+int core_condition_has (core_condition_e disease);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // __CORE_HEALTH_H

cores/esp8266/core_health_setter.h

@@ -0,0 +1,22 @@
+
+#ifndef __CORE_HEALTH_SETTER_H
+#define __CORE_HEALTH_SETTER_H
+
+/*
+   this file is intended to be used by core internals
+ */
+
+#include <core_health.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// bad or fatal things happened
+void core_condition_got (core_condition_e disease);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // __CORE_HEALTH_SETTER_H