2 files changed, 6 insertions, 128 deletions

diff --git a/libcr_ipc/include/libcr_ipc/chan.h b/libcr_ipc/include/libcr_ipc/chan.h
index da4f08e..5b1e583 100644
--- a/libcr_ipc/include/libcr_ipc/chan.h
+++ b/libcr_ipc/include/libcr_ipc/chan.h
@@ -1,6 +1,6 @@
 /* libcr_ipc/chan.h - Simple channels for libcr
  *
- * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * Copyright (C) 2024-2025  Luke T. Shumaker <lukeshu@lukeshu.com>
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
@@ -122,37 +122,7 @@ struct _cr_chan {
 	_cr_ipc_dll_root                waiters;
 };
 
-static void _cr_chan_dequeue(void *_ch, size_t) {
-	struct _cr_chan *ch = _ch;
-	_cr_ipc_dll_pop_from_front(&ch->waiters);
-}
-
-static inline void _cr_chan_xfer(enum _cr_chan_waiter_typ self_typ, struct _cr_chan *ch, void *val_ptr, size_t val_size) {
-	assert(ch);
-	assert(val_ptr);
-
-	if (ch->waiters.front && ch->waiter_typ != self_typ) { /* non-blocking fast-path */
-		/* Copy.  */
-		struct _cr_chan_waiter *front = _cr_ipc_dll_node_cast(struct _cr_chan_waiter, ch->waiters.front);
-		if (self_typ == _CR_CHAN_SENDER)
-			memcpy(front->val_ptr, val_ptr, val_size);
-		else
-			memcpy(val_ptr, front->val_ptr, val_size);
-		cr_unpause(front->cid);
-		front->dequeue(front->dequeue_arg1,
-		               front->dequeue_arg2);
-		cr_yield();
-	} else { /* blocking slow-path */
-		struct _cr_chan_waiter self = {
-			.cid          = cr_getcid(),
-			.val_ptr      = val_ptr,
-			.dequeue      = _cr_chan_dequeue,
-			.dequeue_arg1 = ch,
-		};
-		_cr_ipc_dll_push_to_rear(&ch->waiters, &self);
-		ch->waiter_typ = self_typ;
-		cr_pause_and_yield();
-	}
-}
+void _cr_chan_dequeue(void *_ch, size_t);
+void _cr_chan_xfer(enum _cr_chan_waiter_typ self_typ, struct _cr_chan *ch, void *val_ptr, size_t val_size);
 
 #endif /* _LIBCR_IPC_CHAN_H_ */
diff --git a/libcr_ipc/include/libcr_ipc/select.h b/libcr_ipc/include/libcr_ipc/select.h
index ee49cca..b845082 100644
--- a/libcr_ipc/include/libcr_ipc/select.h
+++ b/libcr_ipc/include/libcr_ipc/select.h
@@ -1,6 +1,6 @@
 /* libcr_ipc/select.h - Select between channels
  *
- * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * Copyright (C) 2024-2025  Luke T. Shumaker <lukeshu@lukeshu.com>
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
@@ -69,106 +69,14 @@ enum _cr_select_class {
 	_CR_SELECT_CLASS_NONBLOCK,
 };
 
-static inline enum _cr_select_class _cr_select_getclass(struct cr_select_arg arg) {
-	switch (arg.op) {
-	case _CR_SELECT_OP_RECV:
-		if (arg.ch->waiters.front && arg.ch->waiter_typ == _CR_CHAN_SENDER)
-			return _CR_SELECT_CLASS_NONBLOCK;
-		else
-			return _CR_SELECT_CLASS_BLOCKING;
-	case _CR_SELECT_OP_SEND:
-		if (arg.ch->waiters.front && arg.ch->waiter_typ == _CR_CHAN_RECVER)
-			return _CR_SELECT_CLASS_NONBLOCK;
-		else
-			return _CR_SELECT_CLASS_BLOCKING;
-	case _CR_SELECT_OP_DEFAULT:
-		return _CR_SELECT_CLASS_DEFAULT;
-	default:
-		assert_notreached("invalid arg.op");
-	}
-}
-
 struct _cr_select_waiters {
 	size_t                   cnt;
 	struct cr_select_arg    *args;
 	struct _cr_chan_waiter  *nodes;
 };
 
-static void _cr_select_dequeue(void *_waiters, size_t idx) {
-	struct _cr_select_waiters *waiters = waiters;
-	for (size_t i = 0; i < waiters->cnt; i++)
-		_cr_ipc_dll_remove(&(waiters->args[i].ch->waiters),
-		                   &(waiters->nodes[i]));
-	waiters->cnt = idx;
-}
-
-static size_t cr_select_v(size_t arg_cnt, struct cr_select_arg arg_vec[]) {
-	size_t  cnt_blocking = 0;
-	size_t  cnt_nonblock = 0;
-	size_t  cnt_default  = 0;
-
-	assert(arg_cnt);
-	assert(arg_vec);
-	cr_assert_in_coroutine();
-
-	for (size_t i = 0; i < arg_cnt; i++) {
-		switch (_cr_select_getclass(arg_vec[i])) {
-		case _CR_SELECT_CLASS_BLOCKING:
-			cnt_blocking++;
-			break;
-		case _CR_SELECT_CLASS_NONBLOCK:
-			cnt_nonblock++;
-			break;
-		case _CR_SELECT_CLASS_DEFAULT:
-			cnt_default++;
-			break;
-		}
-	}
-
-	if (cnt_nonblock) {
-		size_t choice = rand_uint63n(cnt_nonblock);
-		for (size_t i = 0, seen = 0; i < arg_cnt; i++) {
-			if (_cr_select_getclass(arg_vec[i]) == _CR_SELECT_CLASS_NONBLOCK) {
-				if (seen == choice) {
-					_cr_chan_xfer(arg_vec[i].op == _CR_SELECT_OP_RECV
-					              ? _CR_CHAN_RECVER
-					              : _CR_CHAN_SENDER,
-					              arg_vec[i].ch,
-					              arg_vec[i].val_ptr,
-					              arg_vec[i].val_siz);
-					return i;
-				}
-				seen++;
-			}
-		}
-		assert_notreached("should have returned from inside for() loop");
-	}
-
-	if (cnt_default) {
-		for (size_t i = 0; i < arg_cnt; i++)
-			if (_cr_select_getclass(arg_vec[i]) == _CR_SELECT_CLASS_DEFAULT)
-				return i;
-		assert_notreached("should have returned from inside for() loop");
-	}
-
-	struct _cr_select_waiters waiters = {
-		.cnt   = arg_cnt,
-		.args  = arg_vec,
-		.nodes = alloca(sizeof(struct _cr_chan_waiter) * arg_cnt),
-	};
-	for (size_t i = 0; i < arg_cnt; i++) {
-		waiters.nodes[i] = (struct _cr_chan_waiter){
-			.cid          = cr_getcid(),
-			.val_ptr      = arg_vec[i].val_ptr,
-			.dequeue      = _cr_select_dequeue,
-			.dequeue_arg1 = &waiters,
-			.dequeue_arg2 = i,
-		};
-		_cr_ipc_dll_push_to_rear(&arg_vec[i].ch->waiters, &waiters.nodes[i]);
-	}
-	cr_pause_and_yield();
-	return waiters.cnt;
-}
+void _cr_select_dequeue(void *_waiters, size_t idx);
+size_t cr_select_v(size_t arg_cnt, struct cr_select_arg arg_vec[]);
 
 /* cr_select_l(arg1, arg2, arg3, ...) ******************************************/