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[kernel] Add a timeout to endpoint recieve syscalls

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This also required adding support for multiple wait conditions on a
thread, so wait_type is an enum_bitfield now.

I really need a real clock.
This commit is contained in:
Justin C. Miller
2022-01-15 17:48:19 -08:00
parent 2dd78beb92
commit 19f9496889
8 changed files with 81 additions and 31 deletions
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9
src/kernel/objects/endpoint.cpp
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@@ -2,6 +2,7 @@
#include "objects/endpoint.h"
#include "objects/process.h"
#include "objects/thread.h"
#include "scheduler.h"
#include "vm_space.h"
endpoint::endpoint() :
@@ -55,16 +56,20 @@ endpoint::send(j6_tag_t tag, const void *data, size_t data_len)
}
j6_status_t
endpoint::receive(j6_tag_t *tag, void *data, size_t *data_len)
endpoint::receive(j6_tag_t *tag, void *data, size_t *data_len, uint64_t timeout)
{
thread_data receiver = { &thread::current(), data };
receiver.tag_p = tag;
receiver.len_p = data_len;
// Timeout is a duration, but wait_on_* calls need a time
if (timeout)
timeout += scheduler::get().clock();
if (!check_signal(j6_signal_endpoint_can_recv)) {
assert_signal(j6_signal_endpoint_can_send);
m_blocked.append(receiver);
receiver.th->wait_on_object(this);
receiver.th->wait_on_object(this, timeout);
// we woke up having already finished the recv
// because it happened in the sender