reverse-ramdisk.c: implement tf_finish

c-programming/experiments/reverse-ramdisk.c

@@ -14,8 +14,6 @@
  * and/or with set macro DEBUG (using -DDEBUG) to enable debug mode
  *
  * TODO:XXX: `tf_free`: Do not shift the array, only empty entry
- * TODO:XXX: Implement function `tf_finish` to free the array of TempFiles
- * structs
  * TODO:XXX: `tf_free`, `tf_write`, `tf_read`: Do not use `ID` as `index`, but
  * look for it in TempFile structs
  * TODO:XXX: Set freed memory pointers to NULL
@@ -82,6 +80,7 @@ int tf_alloc(size_t n, size_t type_size);
 int tf_free(int ID);
 int tf_write(int ID, size_t offset, void* src, size_t data_size);
 int tf_read(int ID, size_t offset, void* dest, size_t data_size);
+void tf_finish(void);
 
 int tf_alloc(size_t n, size_t type_size) {
 	DBG_PRINT("tf_alloc(%zu, %zu)\n", n, type_size);
@@ -375,6 +374,17 @@ int tf_read(int ID, size_t offset, void* dest, size_t data_size) {
 	return 0;
 }
 
+void tf_finish(void) {
+	DBG_PRINT("tf_finish()\n");
+
+	for (size_t i = 0; i < num_temp_files; i++)
+		if (temp_files[i].file_path != NULL)
+			tf_free(temp_files[i].ID);
+	free(temp_files);
+	temp_files = NULL;
+	num_temp_files = 0;
+}
+
 #ifdef TEST
 int main(void) {
 	DBG_PRINT("started\n");
@@ -440,6 +450,8 @@ int main(void) {
 	tf_free(ID_2);
 	DBG_PRINT("freed both files\n");
 
+	tf_finish();
+
 	return 0;
 }
 #endif