59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
#pragma once
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#include <cassert>
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#include <mutex>
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#include <unordered_map>
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#include <condition_variable>
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#include <atomic>
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namespace VWeb {
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template <typename T, typename S> struct SafeMap {
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explicit SafeMap(size_t maxSize = -1UL) : m_MaxSize(maxSize), m_End(false){};
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bool Add(const T &t, S &x) {
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std::unique_lock<std::mutex> lck(m_Mutex);
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while (m_Data.size() == m_MaxSize && !m_End)
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return false;
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assert(!m_End);
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m_Data.emplace(t, std::move(x));
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return true;
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};
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bool Add(T &&t, S &&x) {
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std::unique_lock<std::mutex> lck(m_Mutex);
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while (m_Data.size() == m_MaxSize && !m_End)
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return false;
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assert(!m_End);
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m_Data.push(std::move(t));
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return true;
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};
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void Remove(T t) {
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std::unique_lock<std::mutex> lck(m_Mutex);
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if (m_Data.empty() || m_End)
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return;
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if (m_Data.contains(t))
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m_Data.erase(t);
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m_CVFull.notify_one();
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};
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void Clear() {
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std::unique_lock<std::mutex> lck(m_Mutex);
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std::unordered_map<T, S> empty;
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std::swap(m_Data, empty);
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m_CVFull.notify_all();
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};
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bool Has(T t) {
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std::unique_lock<std::mutex> lck(m_Mutex);
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return m_Data.contains(t);
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};
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S &Get(T t) {
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std::unique_lock<std::mutex> lck(m_Mutex);
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return m_Data[t];
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};
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int Size() { return m_Data.size(); };
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private:
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std::unordered_map<T, S> m_Data{};
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std::mutex m_Mutex{};
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std::condition_variable m_CVFull{};
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const size_t m_MaxSize{};
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std::atomic<bool> m_End{};
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};
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} |