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#ifndef ENV_ENVFS_H
#define ENV_ENVFS_H
#include "thread_utils.h"
#include <thread>
namespace env
{
struct File
{
std::wstring name;
std::wstring lcname;
FILETIME lastModified;
uint64_t size;
File(std::wstring_view name, FILETIME ft, uint64_t size);
};
struct Directory
{
std::wstring name;
std::wstring lcname;
std::vector<Directory> dirs;
std::vector<File> files;
Directory();
Directory(std::wstring_view name);
};
template <class T>
class ThreadPool
{
public:
ThreadPool(std::size_t max = 1) { setMax(max); }
~ThreadPool() { stopAndJoin(); }
void setMax(std::size_t n) { m_threads.resize(n); }
void stopAndJoin()
{
for (auto& ti : m_threads) {
ti.stop = true;
ti.wakeup();
}
for (auto& ti : m_threads) {
if (ti.thread.joinable()) {
ti.thread.join();
}
}
}
void waitForAll()
{
for (;;) {
bool done = true;
for (auto& ti : m_threads) {
if (ti.busy) {
done = false;
break;
}
}
if (done) {
break;
}
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
T& request()
{
if (m_threads.empty()) {
std::terminate();
}
for (;;) {
for (auto& ti : m_threads) {
bool expected = false;
if (ti.busy.compare_exchange_strong(expected, true)) {
ti.wakeup();
return ti.o;
}
}
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
template <class F>
void forEach(F&& f)
{
for (auto& ti : m_threads) {
f(ti.o);
}
}
private:
struct ThreadInfo
{
std::thread thread;
std::atomic<bool> busy;
T o;
std::condition_variable cv;
std::mutex mutex;
bool ready;
std::atomic<bool> stop;
ThreadInfo() : busy(true), ready(false), stop(false)
{
thread = MOShared::startSafeThread([&] {
run();
});
}
~ThreadInfo()
{
if (thread.joinable()) {
stop = true;
wakeup();
thread.join();
}
}
void wakeup()
{
{
std::scoped_lock lock(mutex);
ready = true;
}
cv.notify_one();
}
void run()
{
busy = false;
while (!stop) {
std::unique_lock lock(mutex);
cv.wait(lock, [&] {
return ready;
});
if (stop) {
break;
}
o.run();
ready = false;
busy = false;
}
}
};
std::list<ThreadInfo> m_threads;
};
using DirStartF = void(void*, std::wstring_view);
using DirEndF = void(void*, std::wstring_view);
using FileF = void(void*, std::wstring_view, FILETIME, uint64_t);
void setHandleCloserThreadCount(std::size_t n);
class DirectoryWalker
{
public:
void forEachEntry(const std::wstring& path, void* cx, DirStartF* dirStartF,
DirEndF* dirEndF, FileF* fileF);
private:
std::vector<std::unique_ptr<unsigned char[]>> m_buffers;
};
void forEachEntry(const std::wstring& path, void* cx, DirStartF* dirStartF,
DirEndF* dirEndF, FileF* fileF);
Directory getFilesAndDirs(const std::wstring& path);
Directory getFilesAndDirsWithFind(const std::wstring& path);
} // namespace env
#endif // ENV_ENVFS_H
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