6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2026-04-20 10:17:05 +00:00
Code Issues Projects Releases Wiki Activity

Extended Storage::Disk::Disk to permit write-back of modified tracks, exposed some interface via Storage::Disk::Drive.

Browse Source
This commit is contained in:
Thomas Harte
2016-12-24 22:11:31 -05:00
parent 7f303cfceb
commit 6e94d0c19f
4 changed files with 68 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Storage/Disk/Disk.cpp
+29 -1
View File
@@ -10,9 +10,23 @@
using namespace Storage::Disk;
int Disk::get_id_for_track_at_position(unsigned int head, unsigned int position)
{
return (int)(position * get_head_count() + head);
}
void Disk::set_track_at_position(unsigned int head, unsigned int position, const std::shared_ptr<Track> &track)
{
if(!get_is_read_only()) return;
int address = get_id_for_track_at_position(head, position);
cached_tracks_[address] = track;
modified_tracks_.insert(address);
}
std::shared_ptr<Track> Disk::get_track_at_position(unsigned int head, unsigned int position)
{
int address = (int)(position * get_head_count() + head);
int address = get_id_for_track_at_position(head, position);
std::map<int, std::shared_ptr<Track>>::iterator cached_track = cached_tracks_.find(address);
if(cached_track != cached_tracks_.end()) return cached_track->second;
@@ -20,3 +34,17 @@ std::shared_ptr<Track> Disk::get_track_at_position(unsigned int head, unsigned i
cached_tracks_[address] = track;
return track;
}
std::shared_ptr<Track> Disk::get_modified_track_at_position(unsigned int head, unsigned int position)
{
int address = get_id_for_track_at_position(head, position);
if(modified_tracks_.find(address) == modified_tracks_.end()) return nullptr;
std::map<int, std::shared_ptr<Track>>::iterator cached_track = cached_tracks_.find(address);
if(cached_track == cached_tracks_.end()) return nullptr;
return cached_track->second;
}
bool Disk::get_is_modified()
{
return !modified_tracks_.empty();
}