void open_next_file(stream_type& res) {
if(files_open_ >= concurrent_files_)
return;
while(paths_cur_ != paths_end_) {
std::string path = *paths_cur_;
++paths_cur_;
res.reset(new file_stream(path.c_str(), *this));
if(res->good())
return;
res.reset();
throw std::runtime_error(err::msg() << "Can't open file '" << path << "'");
}
}
void open_next_pipe(stream_type& res) {
while(!free_pipes_.empty()) {
const char* path = free_pipes_.front();
free_pipes_.pop_front();
res.reset(new pipe_stream(path, *this));
if(res->good()) {
busy_pipes_.insert(path);
return;
}
// The pipe failed to open, so it is not marked as busy. This
// reset will make us forget about this path.
res.reset();
}
}