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#include "checkExist.h"
#include "parallelCall.h"
#include "fileHandling.h"
namespace
{
template <bool (*testExist)(const Zstring&)>
class CheckObjectExists : public Async::Procedure
{
public:
CheckObjectExists(const Zstring& filename) :
filename_(filename.c_str()), //deep copy: worker thread may run longer than main! Avoid shared data
isExisting(false) {}
virtual void doWork()
{
isExisting = testExist(filename_); //throw()
}
bool doesExist() const //retrieve result
{
return isExisting;
}
private:
const Zstring filename_; //no reference, lifetime not known
bool isExisting;
};
template <bool (*testExist)(const Zstring&)>
inline
Utility::ResultExist objExists(const Zstring& filename, size_t timeout) //timeout in ms
{
typedef CheckObjectExists<testExist> CheckObjEx;
boost::shared_ptr<CheckObjEx> proc(new CheckObjEx(filename));
return Async::execute(proc, timeout) == Async::TIMEOUT ? Utility::EXISTING_TIMEOUT :
(proc->doesExist() ? Utility::EXISTING_TRUE : Utility::EXISTING_FALSE);
}
}
Utility::ResultExist Utility::fileExists(const Zstring& filename, size_t timeout) //timeout in ms
{
return objExists<FreeFileSync::fileExists>(filename, timeout);
}
Utility::ResultExist Utility::dirExists(const Zstring& dirname, size_t timeout) //timeout in ms
{
return objExists<FreeFileSync::dirExists>(dirname, timeout);
}
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