initial api changes to support hw_ devices as more-generic attachable modules

[dcpu16] / dcpu16.c

diff --git a/dcpu16.c b/dcpu16.c
index ac052d59887a148f62f5195db9ac8c2c08557063..6ab689888d70a28587f07a47560adf1130d254cd 100644 (file)
--- a/dcpu16.c
+++ b/dcpu16.c
@@ -1358,6 +1358,41 @@ void dcpu16_dump_ram(struct dcpu16 *vm, DCPU16_WORD start, DCPU16_WORD end) {
         printf("\n");
 }
 
+/* instantiate a new 'hardware' device */
+struct dcpu16_hw *dcpu16_hw_new(struct dcpu16 *vm, struct dcpu16_hw_module *mod, void *data) {
+    struct dcpu16_hw *hw;
+
+    hw = calloc(1, sizeof *hw);
+    if (hw == NULL) {
+        vm->warn_cb_("%s():%s", "calloc", strerror(errno));
+        return NULL;
+    }
+    memcpy(hw, mod->template, sizeof *hw);
+    hw->vm = vm;
+
+    if (mod->data_init(hw, data)) {
+        vm->warn_cb_("failed to init hw module data");
+        free(hw);
+        return NULL;
+    }
+    hw->data_free = mod->data_free;
+
+    return hw;
+}
+
+/* destroy a 'hardware' device */
+void dcpu16_hw_del(struct dcpu16_hw **hw) {
+    if (hw) {
+        if (*hw) {
+            if ((*hw)->data_free) {
+                (*hw)->data_free(*hw);
+            }
+            free(*hw);
+            *hw = NULL;
+        }
+    }
+}
+
 /*  dcpu16_hw_add
  *  registers new 'hardware' device with system
  */