initial

1 files changed, 65 insertions, 0 deletions

diff --git a/src/root.c b/src/root.c
new file mode 100644
index 0000000..4324437
--- /dev/null
+++ b/src/root.c
@@ -0,0 +1,65 @@
+#include <stdlib.h>
+
+#include <gran/root.h>
+#include <gran/clock_domain.h>
+
+#define MAX_DOMAINS 512
+
+struct gran_root {
+	size_t num_domains;
+	struct clock_domain *(domains[MAX_DOMAINS]);
+};
+
+struct gran_root *create_root()
+{
+	return calloc(1, sizeof(struct gran_root));
+}
+
+stat root_add_clock(struct gran_root *root, struct clock_domain *clk)
+{
+	if (root->num_domains == MAX_DOMAINS) {
+		error("too many clock domains");
+		return ESIZE;
+	}
+
+	root->domains[root->num_domains++] = clk;
+	return OK;
+}
+
+static struct clock_domain *most_delayed_domain(struct gran_root *root)
+{
+	struct clock_domain *min = root->domains[0];
+
+	for (size_t i = 1; i < root->num_domains; ++i) {
+		struct clock_domain *cur = root->domains[i];
+		if (lt_time(domain_time(cur), domain_time(min)))
+			min = cur;
+	}
+
+	return min;
+}
+
+stat root_run(struct gran_root *root)
+{
+	if (root->num_domains == 0) {
+		info("no clock domains added to root, exiting");
+		return OK;
+	}
+
+	stat ret = OK;
+	while (ret == OK)
+		ret = clock_domain_tick(most_delayed_domain(root));
+
+	if (ret == DONE)
+		return OK;
+
+	return ret;
+}
+
+void destroy_root(struct gran_root *root)
+{
+	for (size_t i = 0; i < root->num_domains; ++i)
+		destroy_clock_domain(root->domains[i]);
+
+	free(root);
+}