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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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10
Kernel/VM/MemoryManager.h
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@ -6,6 +6,7 @@
#pragma once
#include <AK/Concepts.h>
#include <AK/HashTable.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/String.h>
@ -157,7 +158,7 @@ public:
unsigned super_physical_pages() const { return m_super_physical_pages; }
unsigned super_physical_pages_used() const { return m_super_physical_pages_used; }
template<typename Callback>
template<IteratorFunction<VMObject&> Callback>
static void for_each_vmobject(Callback callback)
{
for (auto& vmobject : MM.m_vmobjects) {
@ -166,6 +167,13 @@ public:
}
}
template<VoidFunction<VMObject&> Callback>
static void for_each_vmobject(Callback callback)
{
for (auto& vmobject : MM.m_vmobjects)
callback(vmobject);
}
static Region* find_region_from_vaddr(Space&, VirtualAddress);
static Region* find_user_region_from_vaddr(Space&, VirtualAddress);