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kernel: implement a generic object signalling system

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This commit is contained in:
max 🍓
2026-03-12 20:40:23 +00:00
parent 921c91c02a
commit 2fb8f556b4
7 changed files with 151 additions and 3 deletions
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18
kernel/channel.c
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@@ -5,6 +5,7 @@
#include <kernel/thread.h>
#include <kernel/util.h>
#include <kernel/vm-region.h>
#include <mango/signal.h>
#define CHANNEL_CAST(p) OBJECT_C_CAST(struct channel, c_base, &channel_type, p)
@@ -100,6 +101,7 @@ static struct msg *get_next_msg(
if (msg->msg_status == KMSG_WAIT_RECEIVE) {
msg->msg_status = KMSG_WAIT_REPLY;
msg->msg_sender_port->p_status = PORT_REPLY_BLOCKED;
channel->c_msg_waiting--;
return msg;
}
@@ -119,7 +121,8 @@ extern kern_status_t channel_enqueue_msg(
msg->msg_id++;
}
wakeup_one(&channel->c_wq);
channel->c_msg_waiting++;
object_assert_signal(&channel->c_base, CHANNEL_SIGNAL_MSG_RECEIVED);
return KERN_OK;
}
@@ -129,11 +132,21 @@ extern kern_status_t channel_recv_msg(
kern_msg_t *out_msg,
unsigned long *irq_flags)
{
struct wait_item waiter;
struct thread *self = current_thread();
struct msg *msg = NULL;
unsigned long msg_lock_flags;
msg = get_next_msg(channel, &msg_lock_flags);
if (!msg) {
return KERN_NO_ENTRY;
}
if (channel->c_msg_waiting == 0) {
object_clear_signal(
&channel->c_base,
CHANNEL_SIGNAL_MSG_RECEIVED);
}
#if 0
wait_item_init(&waiter, self);
for (;;) {
thread_wait_begin(&waiter, &channel->c_wq);
@@ -147,6 +160,7 @@ extern kern_status_t channel_recv_msg(
object_lock_irqsave(&channel->c_base, irq_flags);
}
thread_wait_end(&waiter, &channel->c_wq);
#endif
/* msg is now set to the next message to process */