odissey: add server abstraction

core/od_server.h

@@ -0,0 +1,53 @@
+#ifndef OD_SERVER_H_
+#define OD_SERVER_H_
+
+/*
+ * odissey.
+ *
+ * PostgreSQL connection pooler and request router.
+*/
+
+typedef struct odserver_t odserver_t;
+
+typedef enum {
+	OD_SUNDEF,
+	OD_SIDLE,
+	OD_SCONNECT,
+	OD_SACTIVE
+} odserver_state_t;
+
+struct odserver_t {
+	odserver_state_t   state;
+	odscheme_server_t *scheme;
+	ftio_t             io;
+	/* user, database */
+	/* key */
+	odlist_t           link;
+};
+
+static inline void
+od_serverinit(odserver_t *s)
+{
+	s->state  = OD_SUNDEF;
+	s->scheme = NULL;
+	s->io     = NULL;
+	od_listinit(&s->link);
+}
+
+static inline odserver_t*
+od_serveralloc(void)
+{
+	odserver_t *s = malloc(sizeof(*s));
+	if (s == NULL)
+		return NULL;
+	od_serverinit(s);
+	return s;
+}
+
+static inline void
+od_serverfree(odserver_t *s)
+{
+	free(s);
+}
+
+#endif