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[kernel] Have thread call scheduler on blocking

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Instead of making every callsite that may make a thread do a blocking
operation also invoke the scheduler, move that logic into thread
implementation - if the thread is blocking and is the current thread,
call schedule().

Related changes in this commit:

- Also make exiting threads and processes call the scheduler when
  blocking.
- Threads start blocked, and get automatically added to the scheduler's
  blocked list.
This commit is contained in:
Justin C. Miller
2020-09-27 21:35:15 -07:00
parent ff78c951f0
commit 87b0a93d32
9 changed files with 35 additions and 38 deletions
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15
src/kernel/objects/thread.cpp
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@@ -26,8 +26,6 @@ thread::thread(process &parent, uint8_t pri, uintptr_t rsp0) :
setup_kernel_stack();
else
m_tcb.rsp0 = rsp0;
set_state(state::ready);
}
thread::~thread()
@@ -49,12 +47,16 @@ thread::current()
return *bsp_cpu_data.t;
}
inline void schedule_if_current(thread *t) { if (t == bsp_cpu_data.t) scheduler::get().schedule(); }
void
thread::wait_on_signals(kobject *obj, j6_signal_t signals)
{
m_wait_type = wait_type::signal;
m_wait_data = signals;
clear_state(state::ready);
schedule_if_current(this);
}
void
@@ -63,6 +65,8 @@ thread::wait_on_time(uint64_t t)
m_wait_type = wait_type::time;
m_wait_data = t;
clear_state(state::ready);
schedule_if_current(this);
}
void
@@ -71,6 +75,8 @@ thread::wait_on_object(kobject *o)
m_wait_type = wait_type::object;
m_wait_data = reinterpret_cast<uint64_t>(o);
clear_state(state::ready);
schedule_if_current(this);
}
bool
@@ -134,6 +140,8 @@ thread::exit(uint32_t code)
set_state(state::exited);
clear_state(state::ready);
assert_signal(j6_signal_thread_exit);
schedule_if_current(this);
}
void
@@ -200,7 +208,8 @@ thread *
thread::create_idle_thread(process &kernel, uint8_t pri, uintptr_t rsp0)
{
thread *idle = new thread(kernel, pri, rsp0);
idle->set_state(thread::state::constant);
idle->set_state(state::constant);
idle->set_state(state::ready);
log::info(logs::task, "Created idle thread as koid %llx", idle->koid());
return idle;