working on thread safety, preparing for static RTOS

mission/freeRTOS_rust_helper.c

@@ -4,6 +4,29 @@
 
 // TODO namespace the names
 
+SemaphoreHandle_t * global_threading_semaphore = NULL;
+
+uint8_t global_threading_available_c() {
+  if (global_threading_semaphore == NULL) {
+    
+    global_threading_semaphore = xSemaphoreCreateBinary();
+    //xSemaphoreGive(global_threading_semaphore);
+  }
+  if (uxSemaphoreGetCount(global_threading_semaphore) == 1) {
+    return 1;
+  } else {
+    return 0;
+  }
+}
+
+void enable_global_threading_c() {
+  xSemaphoreGive(global_threading_semaphore);
+}
+
+void disable_global_threading_c() {
+  xSemaphoreTake(global_threading_semaphore, portMAX_DELAY);
+}
+
 const char *get_task_name() { return pcTaskGetName(NULL); }
 
 void stop_it() { taskENTER_CRITICAL(); }