70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/kernel/native_list.h"
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namespace xe {
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namespace kernel {
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NativeList::NativeList(Memory* memory)
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: memory_(memory), head_(kInvalidPointer) {}
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void NativeList::Insert(uint32_t ptr) {
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uint8_t* mem = memory_->membase();
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poly::store_and_swap<uint32_t>(mem + ptr + 0, head_);
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poly::store_and_swap<uint32_t>(mem + ptr + 4, 0);
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if (head_) {
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poly::store_and_swap<uint32_t>(mem + head_ + 4, ptr);
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}
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head_ = ptr;
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}
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bool NativeList::IsQueued(uint32_t ptr) {
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uint8_t* mem = memory_->membase();
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uint32_t flink = poly::load_and_swap<uint32_t>(mem + ptr + 0);
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uint32_t blink = poly::load_and_swap<uint32_t>(mem + ptr + 4);
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return head_ == ptr || flink || blink;
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}
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void NativeList::Remove(uint32_t ptr) {
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uint8_t* mem = memory_->membase();
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uint32_t flink = poly::load_and_swap<uint32_t>(mem + ptr + 0);
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uint32_t blink = poly::load_and_swap<uint32_t>(mem + ptr + 4);
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if (ptr == head_) {
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head_ = flink;
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if (flink) {
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poly::store_and_swap<uint32_t>(mem + flink + 4, 0);
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}
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} else {
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if (blink) {
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poly::store_and_swap<uint32_t>(mem + blink + 0, flink);
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}
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if (flink) {
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poly::store_and_swap<uint32_t>(mem + flink + 4, blink);
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}
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}
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poly::store_and_swap<uint32_t>(mem + ptr + 0, 0);
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poly::store_and_swap<uint32_t>(mem + ptr + 4, 0);
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}
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uint32_t NativeList::Shift() {
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if (!head_) {
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return 0;
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}
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uint32_t ptr = head_;
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Remove(ptr);
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return ptr;
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}
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bool NativeList::HasPending() { return head_ != kInvalidPointer; }
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} // namespace kernel
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} // namespace xe
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