Set consumer pos with CAP REQ causal.agency/consumer=n

So the spec doesn't say I can use cap values in CAP REQ. But it also
doesn't explicitly say I can't.

1 files changed, 5 insertions, 0 deletions

diff --git a/ring.c b/ring.c
index 90e6f2a..254c285 100644
--- a/ring.c
+++ b/ring.c
@@ -81,6 +81,11 @@ size_t ringConsumer(const char *name) {
 	return consumers.len++;
 }
 
+void ringSet(size_t consumer, size_t pos) {
+	assert(consumer < consumers.len);
+	if (pos <= producer) consumers.ptr[consumer].pos = pos;
+}
+
 size_t ringPos(size_t consumer) {
 	assert(consumer < consumers.len);
 	return consumers.ptr[consumer].pos;