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hw: improve readability of scheduler

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Minor changes that should not change any semantics:

* Remove `_next_fill()` its short and only used in one context,
  in which it is good to know what that code actually does
* Turn boolean values into actual boolean values
* Remove some brackets around one-liner pathes

Ref genodelabs/genode#5115
This commit is contained in:
Stefan Kalkowski 2024-02-05 10:55:13 +01:00 committed by Christian Helmuth
parent 776c2a6046
commit 0055438257
2 changed files with 11 additions and 23 deletions
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33
repos/base-hw/src/core/kernel/cpu_scheduler.cc
View File

@ -55,13 +55,6 @@ void Cpu_scheduler::_set_head(Share &s, unsigned const q, bool const c)
} }
void Cpu_scheduler::_next_fill()
{
_head->_fill = _fill;
_fills.head_to_tail();
}
void Cpu_scheduler::_head_claimed(unsigned const r) void Cpu_scheduler::_head_claimed(unsigned const r)
{ {
if (!_head->_quota) if (!_head->_quota)
@ -94,8 +87,10 @@ void Cpu_scheduler::_head_filled(unsigned const r)
if (r) if (r)
_head->_fill = r; _head->_fill = r;
else else {
_next_fill(); _head->_fill = _fill;
_fills.head_to_tail();
}
} }
@ -125,11 +120,11 @@ bool Cpu_scheduler::_fill_for_head()
{ {
Double_list_item<Cpu_share> *const item { _fills.head() }; Double_list_item<Cpu_share> *const item { _fills.head() };
if (!item) if (!item)
return 0; return false;
Share &share = item->payload(); Share &share = item->payload();
_set_head(share, share._fill, 0); _set_head(share, share._fill, 0);
return 1; return true;
} }
@ -205,7 +200,7 @@ void Cpu_scheduler::ready(Share &s)
{ {
assert(!s._ready && &s != &_idle); assert(!s._ready && &s != &_idle);
s._ready = 1; s._ready = true;
if (s._quota) { if (s._quota) {
_ucl[s._prio].remove(&s._claim_item); _ucl[s._prio].remove(&s._claim_item);
@ -214,14 +209,10 @@ void Cpu_scheduler::ready(Share &s)
_rcl[s._prio].insert_head(&s._claim_item); _rcl[s._prio].insert_head(&s._claim_item);
if (_head && _head_claims) { if (_head && _head_claims) {
if (s._prio >= _head->_prio) { if (s._prio >= _head->_prio)
_need_to_schedule = true; _need_to_schedule = true;
} } else
} else {
_need_to_schedule = true; _need_to_schedule = true;
}
} else { } else {
_rcl[s._prio].insert_tail(&s._claim_item);; _rcl[s._prio].insert_tail(&s._claim_item);;
@ -230,10 +221,8 @@ void Cpu_scheduler::ready(Share &s)
s._fill = _fill; s._fill = _fill;
_fills.insert_tail(&s._fill_item); _fills.insert_tail(&s._fill_item);
if (!_head || _head == &_idle) {
_need_to_schedule = true; if (!_head || _head == &_idle) _need_to_schedule = true;
}
} }
@ -244,7 +233,7 @@ void Cpu_scheduler::unready(Share &s)
if (&s == _head) if (&s == _head)
_need_to_schedule = true; _need_to_schedule = true;
s._ready = 0; s._ready = false;
_fills.remove(&s._fill_item); _fills.remove(&s._fill_item);
if (!s._quota) if (!s._quota)

1
repos/base-hw/src/core/kernel/cpu_scheduler.h
View File

@ -156,7 +156,6 @@ class Kernel::Cpu_scheduler
void _next_round(); void _next_round();
void _consumed(unsigned const q); void _consumed(unsigned const q);
void _set_head(Share &s, unsigned const q, bool const c); void _set_head(Share &s, unsigned const q, bool const c);
void _next_fill();
void _head_claimed(unsigned const r); void _head_claimed(unsigned const r);
void _head_filled(unsigned const r); void _head_filled(unsigned const r);
bool _claim_for_head(); bool _claim_for_head();