jvs/jvs-bus.c: Add JVS bus definitions

jvs/jvs-bus.c

@@ -0,0 +1,30 @@
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "jvs/jvs-bus.h"
+
+void jvs_bus_transact(
+        struct jvs_node *head,
+        const void *bytes,
+        size_t nbytes,
+        struct iobuf *resp)
+{
+    struct jvs_node *node;
+
+    assert(bytes != NULL);
+    assert(resp != NULL);
+
+    for (node = head ; node != NULL ; node = node->next) {
+        node->transact(node, bytes, nbytes, resp);
+    }
+}
+
+bool jvs_node_sense(struct jvs_node *node)
+{
+    if (node != NULL) {
+        return node->sense(node);
+    } else {
+        return false;
+    }
+}

jvs/jvs-bus.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include "hook/iobuf.h"
+
+struct jvs_node {
+    struct jvs_node *next;
+    void (*transact)(
+            struct jvs_node *node,
+            const void *bytes,
+            size_t nbytes,
+            struct iobuf *resp);
+    bool (*sense)(struct jvs_node *node);
+};
+
+void jvs_bus_transact(
+        struct jvs_node *head,
+        const void *bytes,
+        size_t nbytes,
+        struct iobuf *resp);
+
+bool jvs_node_sense(struct jvs_node *node);

jvs/meson.build

@@ -7,5 +7,7 @@ jvs_lib = static_library(
         capnhook.get_variable('hook_dep'),
     ],
     sources : [
+        'jvs-bus.c',
+        'jvs-bus.h',
     ],
 )