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https://github.com/justinian/jsix.git
synced 2025-12-09 16:04:32 -08:00
Justin C. Miller
113d14c440
page_manager is dead - final uses replaced in vm_space (page_in and clear). Removed the header and cpp, and other lingering references.
98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
#include "objects/endpoint.h"
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#include "objects/process.h"
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#include "objects/thread.h"
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#include "scheduler.h"
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#include "vm_space.h"
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endpoint::endpoint() :
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kobject(kobject::type::endpoint)
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{}
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endpoint::~endpoint()
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{
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if (!check_signal(j6_signal_endpoint_closed))
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close();
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}
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void
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endpoint::close()
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{
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assert_signal(j6_signal_endpoint_closed);
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for (auto &data : m_blocked)
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data.th->wake_on_result(this, j6_status_closed);
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}
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j6_status_t
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endpoint::send(size_t len, void *data)
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{
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scheduler &s = scheduler::get();
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TCB *tcb = s.current();
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thread_data sender = { thread::from_tcb(tcb), data };
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sender.len = len;
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if (!check_signal(j6_signal_endpoint_can_send)) {
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assert_signal(j6_signal_endpoint_can_recv);
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sender.th->wait_on_object(this);
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m_blocked.append(sender);
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s.schedule();
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// we woke up having already finished the send
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// because it happened in the receiver
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return sender.th->get_wait_result();
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}
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thread_data receiver = m_blocked.pop_front();
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if (m_blocked.count() == 0)
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deassert_signal(j6_signal_endpoint_can_send);
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j6_status_t status = do_message_copy(sender, receiver);
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receiver.th->wake_on_result(this, status);
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return status;
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}
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j6_status_t
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endpoint::receive(size_t *len, void *data)
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{
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scheduler &s = scheduler::get();
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TCB *tcb = s.current();
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thread_data receiver = { thread::from_tcb(tcb), data };
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receiver.len_p = len;
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if (!check_signal(j6_signal_endpoint_can_recv)) {
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assert_signal(j6_signal_endpoint_can_send);
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receiver.th->wait_on_object(this);
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m_blocked.append(receiver);
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s.schedule();
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// we woke up having already finished the recv
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// because it happened in the sender
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return receiver.th->get_wait_result();
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}
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thread_data sender = m_blocked.pop_front();
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if (m_blocked.count() == 0)
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deassert_signal(j6_signal_endpoint_can_recv);
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// TODO: don't pop sender on some errors
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j6_status_t status = do_message_copy(sender, receiver);
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sender.th->wake_on_result(this, status);
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return status;
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}
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j6_status_t
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endpoint::do_message_copy(const endpoint::thread_data &sender, endpoint::thread_data &receiver)
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{
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if (sender.len > *receiver.len_p)
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return j6_err_insufficient;
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vm_space &source = sender.th->parent().space();
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vm_space &dest = receiver.th->parent().space();
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vm_space::copy(source, dest, sender.data, receiver.data, sender.len);
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*receiver.len_p = sender.len;
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// TODO: this will not work if non-contiguous pages are mapped!!
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return j6_status_ok;
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}
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