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[kernel] Add thead kobject class

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Add the thread kernel API object and move the scheduler to use threads
instead of processes for scheduling and task switching.
This commit is contained in:
Justin C. Miller
2020-07-12 16:03:46 -07:00
parent 8687fe3786
commit 794c86f9b4
16 changed files with 504 additions and 230 deletions
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54
src/kernel/objects/kobject.cpp
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@@ -2,6 +2,7 @@
#include "j6/signals.h"
#include "j6/types.h"
#include "objects/kobject.h"
#include "objects/thread.h"
// TODO: per-cpu this?
static j6_koid_t next_koid;
@@ -14,7 +15,8 @@ kobject::kobject(type t, j6_signal_t signals) :
kobject::~kobject()
{
notify_signal_observers(0, j6_status_destroyed);
for (auto *t : m_blocked_threads)
t->wake_on_result(this, j6_status_destroyed);
}
j6_koid_t
@@ -33,58 +35,30 @@ void
kobject::assert_signal(j6_signal_t s)
{
m_signals |= s;
notify_signal_observers(s);
notify_signal_observers();
}
void
kobject::deassert_signal(j6_signal_t s)
{
m_signals &= ~s;
notify_signal_observers(s);
}
void
kobject::register_signal_observer(observer *object, j6_signal_t s)
kobject::notify_signal_observers()
{
m_observers.emplace(object, s);
}
size_t i = 0;
bool readied = false;
while (i < m_blocked_threads.count()) {
thread *t = m_blocked_threads[i];
void
kobject::deregister_signal_observer(observer *object)
{
for (size_t i = 0; i < m_observers.count(); ++i) {
auto &reg = m_observers[i];
if (reg.object != object) continue;
reg = m_observers[m_observers.count() - 1];
m_observers.remove();
break;
}
}
void
kobject::notify_signal_observers(j6_signal_t mask, j6_status_t result)
{
for (auto &reg : m_observers) {
if (mask == 0 || (reg.signals & mask) != 0) {
if (!reg.object->on_signals_changed(this, m_signals, mask, result))
reg.object = nullptr;
if (t->wake_on_signals(this, m_signals)) {
m_blocked_threads.remove_swap_at(i);
readied = true;
} else {
++i;
}
}
// Compact the observer list
long last = m_observers.count() - 1;
while (m_observers[last].object == nullptr && last >= 0) last--;
for (long i = 0; i < long(m_observers.count()) && i < last; ++i) {
auto &reg = m_observers[i];
if (reg.object != nullptr) continue;
reg = m_observers[last--];
while (m_observers[last].object == nullptr && last >= i) last--;
}
m_observers.set_size(last + 1);
}
void