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AK+Kernel+LibELF: Remove the need for IteratorDecision::Continue

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By constraining two implementations, the compiler will select the best
fitting one. All this will require is duplicating the implementation and
simplifying for the `void` case.

This constraining also informs both the caller and compiler by passing
the callback parameter types as part of the constraint
(e.g.: `IterationFunction<int>`).

Some `for_each` functions in LibELF only take functions which return
`void`. This is a minimal correctness check, as it removes one way for a
function to incompletely do something.

There seems to be a possible idiom where inside a lambda, a `return;` is
the same as `continue;` in a for-loop.
This commit is contained in:
Nicholas Baron 2021-05-16 02:36:52 -07:00 • committed by GitHub
parent bbaa463032
commit aa4d41fe2c
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25 changed files with 311 additions and 127 deletions
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6
Kernel/Arch/i386/CPU.cpp
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@ -2090,12 +2090,11 @@ void Processor::smp_broadcast_message(ProcessorMessage& msg)
VERIFY(msg.refs > 0);
bool need_broadcast = false;
for_each(
[&](Processor& proc) -> IterationDecision {
[&](Processor& proc) {
if (&proc != &cur_proc) {
if (proc.smp_queue_message(msg))
need_broadcast = true;
}
return IterationDecision::Continue;
});
// Now trigger an IPI on all other APs (unless all targets already had messages queued)
@ -2215,9 +2214,8 @@ void Processor::smp_broadcast_halt()
// We don't want to use a message, because this could have been triggered
// by being out of memory and we might not be able to get a message
for_each(
[&](Processor& proc) -> IterationDecision {
[&](Processor& proc) {
proc.m_halt_requested.store(true, AK::MemoryOrder::memory_order_release);
return IterationDecision::Continue;
});
// Now trigger an IPI on all other APs