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Kernel: Use the Function class for smp_broadcast()/smp_unicast()

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This avoids allocations for smp_broadcast() and smp_unicast() by
using the Function class.
This commit is contained in:
Gunnar Beutner 2021-05-20 02:06:57 +02:00 • committed by Andreas Kling
parent cac7a8ced9
commit 8495d6aeca
2 changed files with 25 additions and 78 deletions
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58
Kernel/Arch/x86/CPU.h
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@ -574,23 +574,17 @@ struct MemoryManagerData;
struct ProcessorMessageEntry;
struct ProcessorMessage {
using CallbackFunction = Function<void()>;
enum Type {
FlushTlb,
Callback,
CallbackWithData
};
Type type;
volatile u32 refs; // atomic
union {
ProcessorMessage* next; // only valid while in the pool
struct {
void (*handler)();
} callback;
struct {
void* data;
void (*handler)(void*);
void (*free)(void*);
} callback_with_data;
alignas(CallbackFunction) u8 callback_storage[sizeof(CallbackFunction)];
struct {
const PageDirectory* page_directory;
u8* ptr;
@ -601,6 +595,17 @@ struct ProcessorMessage {
volatile bool async;
ProcessorMessageEntry* per_proc_entries;
CallbackFunction& callback_value()
{
return *bit_cast<CallbackFunction*>(&callback_storage);
}
void invoke_callback()
{
VERIFY(type == Type::Callback);
callback_value()();
}
};
struct ProcessorMessageEntry {
@ -942,39 +947,8 @@ public:
static void smp_enable();
bool smp_process_pending_messages();
template<typename Callback>
static void smp_broadcast(Callback callback, bool async)
{
auto* data = new Callback(move(callback));
smp_broadcast(
[](void* data) {
(*reinterpret_cast<Callback*>(data))();
},
data,
[](void* data) {
delete reinterpret_cast<Callback*>(data);
},
async);
}
static void smp_broadcast(void (*callback)(), bool async);
static void smp_broadcast(void (*callback)(void*), void* data, void (*free_data)(void*), bool async);
template<typename Callback>
static void smp_unicast(u32 cpu, Callback callback, bool async)
{
auto* data = new Callback(move(callback));
smp_unicast(
cpu,
[](void* data) {
(*reinterpret_cast<Callback*>(data))();
},
data,
[](void* data) {
delete reinterpret_cast<Callback*>(data);
},
async);
}
static void smp_unicast(u32 cpu, void (*callback)(), bool async);
static void smp_unicast(u32 cpu, void (*callback)(void*), void* data, void (*free_data)(void*), bool async);
static void smp_broadcast(Function<void()>, bool async);
static void smp_unicast(u32 cpu, Function<void()>, bool async);
static void smp_broadcast_flush_tlb(const PageDirectory*, VirtualAddress, size_t);
static u32 smp_wake_n_idle_processors(u32 wake_count);