Kernel: Add Processor::try_for_each() for fallible iteration

This API will allow users to short circuit iteration and properly
propagate errors.

1 files changed, 11 insertions, 0 deletions

diff --git a/Kernel/Arch/x86/Processor.h b/Kernel/Arch/x86/Processor.h
index c2e620d8c2..fa98091d1a 100644
--- a/Kernel/Arch/x86/Processor.h
+++ b/Kernel/Arch/x86/Processor.h
@@ -208,6 +208,17 @@ public:
         return IterationDecision::Continue;
     }
 
+    static inline ErrorOr<void> try_for_each(Function<ErrorOr<void>(Processor&)> callback)
+    {
+        auto& procs = processors();
+        size_t count = procs.size();
+        for (size_t i = 0; i < count; i++) {
+            if (procs[i] != nullptr)
+                TRY(callback(*procs[i]));
+        }
+        return {};
+    }
+
     ALWAYS_INLINE u8 physical_address_bit_width() const { return m_physical_address_bit_width; }
     ALWAYS_INLINE u8 virtual_address_bit_width() const { return m_virtual_address_bit_width; }