digouyou
326306d76a
A lightweight Windows mouse highlight overlay tool with halo circle and click ripple animations, built with C++17 and Win32 API.
97 lines
3.0 KiB
C++
97 lines
3.0 KiB
C++
#pragma once
|
||
|
||
#include <atomic>
|
||
#include <array>
|
||
#include <cstdint>
|
||
#include <cstring>
|
||
#include <windows.h>
|
||
|
||
// 对齐至缓存行 (64 字节) 避免伪共享
|
||
#pragma pack(push, 8)
|
||
|
||
/**
|
||
* @brief 点击事件结构 - 无锁环形队列中的单个元素
|
||
*/
|
||
struct ClickEvent {
|
||
int32_t x, y; // 屏幕坐标
|
||
uint32_t timestamp; // GetTickCount64() 毫秒戳
|
||
uint8_t button; // 0=Left, 1=Right, 2=Middle
|
||
};
|
||
|
||
/**
|
||
* @brief 钩子线程与渲染线程间的共享状态
|
||
*
|
||
* - 钩子线程写入：cursorX, cursorY, isDirty, clickQueue
|
||
* - 渲染线程读取：同上
|
||
* - 所有操作无锁，仅原子变量
|
||
*/
|
||
struct alignas(64) SharedMouseState {
|
||
// 鼠标实时坐标 - 钩子线程写，渲染线程读
|
||
std::atomic<int32_t> cursorX{0};
|
||
std::atomic<int32_t> cursorY{0};
|
||
|
||
// 脏标记 - 通知渲染线程需要更新
|
||
std::atomic<bool> isDirty{false};
|
||
|
||
// 点击事件环形队列
|
||
static constexpr size_t MAX_CLICK_EVENTS = 8;
|
||
std::array<ClickEvent, MAX_CLICK_EVENTS> clickQueue{};
|
||
|
||
// 环形队列指针 - 只能单调递增
|
||
// 注意: 不追回溯，无需 CAS；仅需 load/store 序列化
|
||
std::atomic<uint8_t> clickHead{0}; // 写指针 (钩子线程写)
|
||
std::atomic<uint8_t> clickTail{0}; // 读指针 (渲染线程读)
|
||
|
||
/**
|
||
* @brief 钩子线程调用 - 尝试入队一个点击事件
|
||
* @return true 成功入队，false 队列满
|
||
*/
|
||
bool TryEnqueueClick(int32_t x, int32_t y, uint8_t button) noexcept {
|
||
uint8_t head = clickHead.load(std::memory_order_relaxed);
|
||
uint8_t tail = clickTail.load(std::memory_order_acquire);
|
||
|
||
// 检查队列是否满
|
||
uint8_t nextHead = (head + 1) % MAX_CLICK_EVENTS;
|
||
if (nextHead == tail) {
|
||
return false; // 队列满，丢弃
|
||
}
|
||
|
||
// 写入事件
|
||
clickQueue[head].x = x;
|
||
clickQueue[head].y = y;
|
||
clickQueue[head].timestamp = GetTickCount();
|
||
clickQueue[head].button = button;
|
||
|
||
// 推进写指针
|
||
clickHead.store(nextHead, std::memory_order_release);
|
||
isDirty.store(true, std::memory_order_release);
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* @brief 渲染线程调用 - 尝试出队一个点击事件
|
||
* @return true 成功出队到 event，false 队列空
|
||
*/
|
||
bool TryDequeueClick(ClickEvent& event) noexcept {
|
||
uint8_t head = clickHead.load(std::memory_order_acquire);
|
||
uint8_t tail = clickTail.load(std::memory_order_relaxed);
|
||
|
||
if (tail == head) {
|
||
return false; // 队列空
|
||
}
|
||
|
||
// 读取事件
|
||
event = clickQueue[tail];
|
||
|
||
// 推进读指针
|
||
clickTail.store((tail + 1) % MAX_CLICK_EVENTS, std::memory_order_release);
|
||
return true;
|
||
}
|
||
};
|
||
|
||
#pragma pack(pop)
|
||
|
||
// 编译期检查
|
||
static_assert(sizeof(SharedMouseState) <= 256, "SharedMouseState should not exceed 256 bytes");
|
||
static_assert(alignof(SharedMouseState) == 64, "SharedMouseState must be cache-line aligned");
|