From 6d0e7c5eba49efc171e63ff2631722a5c7f95460 Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Wed, 25 Sep 2024 21:00:16 +0300
Subject: technically speaking deadlock free, but starves

---
 src/components/grid/router.c | 136 -------------------------------------------
 1 file changed, 136 deletions(-)
 delete mode 100644 src/components/grid/router.c

(limited to 'src/components/grid/router.c')

diff --git a/src/components/grid/router.c b/src/components/grid/router.c
deleted file mode 100644
index 63c4011..0000000
--- a/src/components/grid/router.c
+++ /dev/null
@@ -1,136 +0,0 @@
-#include <stdbool.h>
-
-#include <gran/grid/node.h>
-#include <gran/grid/router.h>
-#include <gran/vec.h>
-
-struct router_region {
-	uint32_t addr;
-	uint32_t size;
-	struct component *component;
-};
-
-struct node_router {
-	struct component component;
-	struct component *ascend;
-	struct vec regions;
-	uint8_t u, v, x, y;
-
-	struct component *send;
-	struct packet pkt;
-	bool busy;
-};
-
-static struct router_region *find_region(struct node_router *router, uint32_t addr)
-{
-	for (size_t i = 0; i < vec_len(&router->regions); ++i) {
-		struct router_region *region = vec_at(&router->regions, i);
-
-		if (addr >= region->addr && addr < region->addr + region->size)
-			return region;
-	}
-
-	return NULL;
-}
-
-static stat router_clock(struct node_router *router)
-{
-	if (!router->busy)
-		return OK;
-
-	stat r = SEND(router, router->send, router->pkt);
-	if (r == EBUSY)
-		return OK;
-
-	router->busy = false;
-	return OK;
-}
-
-static stat router_receive(struct node_router *router, struct component *from, struct packet pkt)
-{
-	if (router->busy)
-		return EBUSY;
-
-	router->busy = true;
-
-	uint64_t addr = pkt.to;
-	uint8_t u;
-	uint8_t v;
-	uint8_t x;
-	uint8_t y;
-	addr_grid(addr, NULL, &x, &y, &u, &v);
-
-	router->pkt = pkt;
-
-	if (router->u != u || router->v != v || router->x != x || router->y != y) {
-		if (!router->ascend)
-			goto nosuch;
-
-		router->send = router->ascend;
-		return OK;
-	}
-
-	struct router_region *region = find_region(router, addr);
-	if (!region)
-		goto nosuch;
-
-	router->send = region->component;
-	return OK;
-
-nosuch:
-	router->send = from;
-	router->pkt = response(pkt);
-	set_flags(&router->pkt, PACKET_ERROR);
-	return OK;
-}
-
-struct component *create_node_router(uint8_t u, uint8_t v, uint8_t x, uint8_t y)
-{
-	struct node_router *router = calloc(1, sizeof(struct node_router));
-	if (!router)
-		return NULL;
-
-	router->u = u;
-	router->v = v;
-	router->x = x;
-	router->y = y;
-
-	router->component.receive = (receive_callback)router_receive;
-	router->component.clock = (clock_callback)router_clock;
-	router->regions = vec_create(sizeof(struct router_region));
-
-	return (struct component *)router;
-}
-
-stat node_router_add(struct component *router, struct component *component, uint32_t addr, uint32_t size)
-{
-	struct node_router *nr = (struct node_router *)router;
-	struct router_region *found = find_region(nr, addr);
-	if (!found)           found = find_region(nr, addr + size);
-
-	if (found) {
-		error("%s overlaps with %s at %x",
-				found->component->name,
-				component->name,
-				found->addr
-		     );
-
-		return EEXISTS;
-	}
-
-	struct router_region r = (struct router_region){
-		.addr = addr,
-		.size = size,
-		.component = component
-	};
-	vect_append(struct node_region, nr->regions, &r);
-
-	return OK;
-}
-
-stat node_router_ascend(struct component *router, struct component *node)
-{
-	struct node_router *nr = (struct node_router *)router;
-	nr->ascend = node;
-	return OK;
-}
-- 
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