lib: c: re-organise into separate static modules, plus a single shared library

lib/libc/io/remote.c

@@ -0,0 +1,45 @@
+#include <sys/remote.h>
+
+#define TID_INVALID  ((tid_t) - 1)
+#define CHID_INVALID ((unsigned int)-1)
+
+struct remote {
+	tid_t tid;
+	unsigned int chid;
+};
+
+static struct remote remotes[] = {
+	[SYS_REMOTE_NONE] = {.tid = TID_INVALID, .chid = CHID_INVALID},
+	[SYS_REMOTE_NSD] = {.tid = TID_INVALID, .chid = CHID_INVALID},
+};
+static const size_t nr_remotes = sizeof remotes / sizeof remotes[0];
+
+bool sys_remote_get(
+	enum sys_remote_id id,
+	tid_t *out_tid,
+	unsigned int *out_chid)
+{
+	if (id < 0 || id >= nr_remotes) {
+		return false;
+	}
+
+	const struct remote *remote = &remotes[id];
+	if (remote->tid == TID_INVALID || remote->chid == CHID_INVALID) {
+		return false;
+	}
+
+	*out_tid = remote->tid;
+	*out_chid = remote->chid;
+	return true;
+}
+
+void sys_remote_set(enum sys_remote_id id, tid_t tid, unsigned int chid)
+{
+	if (id < 0 || id >= nr_remotes) {
+		return;
+	}
+
+	struct remote *remote = &remotes[id];
+	remote->tid = tid;
+	remote->chid = chid;
+}