FileWatcherManager.cpp

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#include "Headers/FileWatcherManager.h"
#include "Headers/FileUpdateMonitor.h"
 
namespace Divide {
    namespace {
        constexpr U32 g_updateFrameInterval = 60;
    }
 
    NO_DESTROY vector<std::pair<FileWatcher_uptr, U32>> FileWatcherManager::s_fileWatchers;
 
    FileWatcher& FileWatcherManager::allocateWatcher() {
        s_fileWatchers.emplace_back(std::make_pair( std::make_unique<FileWatcher>(), g_updateFrameInterval));
        s_fileWatchers.back().first->_impl = std::make_unique<FW::FileWatcher>();
        return *s_fileWatchers.back().first;
    }
 
    void FileWatcherManager::deallocateWatcher(const FileWatcher& fw) {
        deallocateWatcher(fw.getGUID());
    }
 
    void FileWatcherManager::deallocateWatcher(I64 fileWatcherGUID) {
        s_fileWatchers.erase(
            std::remove_if(std::begin(s_fileWatchers), std::end(s_fileWatchers),
                           [fileWatcherGUID](const auto& it) noexcept
                           -> bool { return it.first->getGUID() == fileWatcherGUID; }),
            std::end(s_fileWatchers));
    }
 
    void FileWatcherManager::update() {
        // Expensive: update just once every few frame
        for (auto& [fw, counter] : s_fileWatchers) {
            if (--counter == 0u) {
                counter = g_updateFrameInterval;
                (*fw)().update();
                return;
            }
        }
    }
}; //namespace Divide