Basic object system - THIS IS STILL A LONG WAY TO GO!!

1 files changed, 40 insertions, 0 deletions

diff --git a/src/kernel/lib/earray.h b/src/kernel/lib/earray.h
new file mode 100644
index 0000000..69849c9
--- /dev/null
+++ b/src/kernel/lib/earray.h
@@ -0,0 +1,40 @@
+#ifndef DEF_EARRAY_H
+#define DEF_EARRAY_H
+
+#include <sched.h>
+
+/*
+ * This class implements a simple extensible array structure.
+ * An entry with a 0 value is considered free and can be allocated.
+ * The array will free as much space when elements are removed.
+ * The array will ALWAYS have array->data = 0 when uninitialized, !=0 when initialized and in use
+ * To initialize an earray:
+ * - allocate the struct earray
+ * - set its ref_vect_init_len and vect_len to desired values
+ * - set its data to 0
+ * - all the rest doesn't matter
+ * - call earray_init
+ * Freeing an array does not free the struct earray, only the data it references.
+ */
+
+struct earray {
+	int ref_vect_init_len;
+	int vect_len;		// NEVER CHANGE THIS AFTER INITIALISATION!!!!
+
+	int ref_vect_len;
+	int elements;
+	void ***data;
+
+	mutex_t mutex;
+};
+
+void earray_init(struct earray *array);
+void earray_free(struct earray *earray);				// frees everything
+
+int earray_add(struct earray *array, void* ptr);		// return element number or -1 if fail
+void *earray_at(struct earray *array, int num);			// returns 0 when nothing
+void earray_set(struct earray *earray, int num, void* ptr);
+
+
+#endif
+