technically speaking deadlock free, but starves

1 files changed, 0 insertions, 117 deletions

diff --git a/src/components/bus/simple_bus.c b/src/components/bus/simple_bus.c
deleted file mode 100644
index 1932419..0000000
--- a/src/components/bus/simple_bus.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: copyleft-next-0.3.1 */
-/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
-#include <stdbool.h>
-
-#include <gran/bus/simple_bus.h>
-#include <gran/vec.h>
-
-struct bus_region {
-	uint64_t addr;
-	uint64_t size;
-	struct component *component;
-};
-
-struct simple_bus {
-	struct component component;
-	struct vec regions;
-
-	struct component *send;
-	struct packet pkt;
-	bool busy;
-};
-
-static struct bus_region *find_bus_region(struct simple_bus *bus, uint64_t addr)
-{
-	foreach_vec(i, bus->regions) {
-		struct bus_region *r = vec_at(&bus->regions, i);
-		if (addr >= r->addr && addr < (r->addr + r->size))
-			return r;
-	}
-
-	return NULL;
-}
-
-static stat simple_bus_clock(struct simple_bus *bus)
-{
-	if (bus->busy) {
-		stat r = SEND(bus, bus->send, bus->pkt);
-		if (r == EBUSY)
-			return OK;
-
-		bus->busy = false;
-		return r;
-	}
-
-	return OK;
-}
-
-static stat simple_bus_receive(struct simple_bus *bus, struct component *from, struct packet pkt)
-{
-	if (bus->busy)
-		return EBUSY;
-
-	bus->busy = true;
-
-	struct bus_region *region = find_bus_region(bus, pkt.to);
-	if (!region) {
-		warn("illegal address on bus %s at %" PRIuPTR,
-		     bus->component.name, pkt.to);
-
-		bus->send = from;
-		bus->pkt = response(pkt);
-		set_flags(&bus->pkt, PACKET_ERROR);
-		return OK;
-	}
-
-	bus->send = region->component;
-	bus->pkt = pkt;
-	return OK;
-}
-
-static void simple_bus_destroy(struct simple_bus *bus)
-{
-	vec_destroy(&bus->regions);
-	free(bus);
-}
-
-struct component *create_simple_bus()
-{
-	struct simple_bus *bus = calloc(1, sizeof(struct simple_bus));
-	if (!bus)
-		return NULL;
-
-	bus->component.receive = (receive_callback)simple_bus_receive;
-	bus->component.clock = (clock_callback)simple_bus_clock;
-
-	bus->component.destroy = (destroy_callback)simple_bus_destroy;
-	bus->regions = vec_create(sizeof(struct bus_region));
-
-	return (struct component *)bus;
-}
-
-stat simple_bus_add(struct component *bus, struct component *component,
-                    uint64_t addr, uint64_t size)
-{
-	struct simple_bus *b = (struct simple_bus *)bus;
-	struct bus_region *found = find_bus_region(b, addr);
-	if (!found)        found = find_bus_region(b, addr + size);
-
-	if (found) {
-		error("%s overlaps with %s at %" PRIuPTR,
-		      found->component->name,
-		      component->name,
-		      found->addr
-		      );
-
-		return EEXISTS;
-	}
-
-	struct bus_region new = (struct bus_region){
-		.component = component,
-		.addr = addr,
-		.size = size
-	};
-
-	vect_append(struct bus_region, b->regions, &new);
-	return OK;
-}