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kernel: implement sending, receiving, and replying to message via port/channel

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This commit is contained in:
max 🍓
2026-02-21 11:32:57 +00:00
parent 08c78bd6e7
commit 77936e3511
6 changed files with 317 additions and 51 deletions
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43
kernel/port.c
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@@ -20,8 +20,24 @@ struct port *port_cast(struct object *obj)
return PORT_CAST(obj);
}
static void wait_for_reply(struct port *port)
static void wait_for_reply(struct kmsg *msg, unsigned long *lock_flags)
{
struct wait_item waiter;
struct thread *self = current_thread();
wait_item_init(&waiter, self);
for (;;) {
self->tr_state = THREAD_SLEEPING;
if (msg->msg_status == KMSG_REPLY_SENT) {
break;
}
port_unlock_irqrestore(msg->msg_sender_port, *lock_flags);
schedule(SCHED_NORMAL);
port_lock_irqsave(msg->msg_sender_port, lock_flags);
}
self->tr_state = THREAD_READY;
}
struct port *port_create(void)
@@ -49,10 +65,22 @@ kern_status_t port_connect(struct port *port, struct channel *remote)
return KERN_OK;
}
kern_status_t port_disconnect(struct port *port)
{
if (port->p_status != PORT_READY) {
return KERN_BAD_STATE;
}
port->p_remote = NULL;
port->p_status = PORT_OFFLINE;
return KERN_OK;
}
kern_status_t port_send_msg(
struct port *port,
const struct msg *req,
struct msg *resp)
struct msg *resp,
unsigned long *lock_flags)
{
if (port->p_status != PORT_READY) {
return KERN_BAD_STATE;
@@ -60,19 +88,20 @@ kern_status_t port_send_msg(
struct thread *self = current_thread();
struct kmsg *msg = &self->tr_msg;
memset(msg, 0x0, sizeof *msg);
msg->msg_status = KMSG_WAIT_RECEIVE;
msg->msg_sender_thread = self;
msg->msg_sender_port = port;
msg->msg_req = req;
msg->msg_resp = resp;
msg->msg_req = *req;
msg->msg_resp = *resp;
unsigned long flags;
channel_lock_irqsave(port->p_remote, &flags);
port->p_status = PORT_SEND_BLOCKED;
channel_enqueue_msg(port->p_remote, msg);
channel_unlock_irqrestore(port->p_remote, flags);
port->p_status = PORT_SEND_BLOCKED;
wait_for_reply(port);
wait_for_reply(msg, lock_flags);
return msg->msg_result;
}