def _set_files_disabled(self, old_priority, new_priority):
old_disabled = [p == -1 for p in old_priority]
new_disabled = [p == -1 for p in new_priority]
data_to_update = []
for f in xrange(self.numfiles):
if new_disabled[f] != old_disabled[f]:
data_to_update.extend(self.storage.get_piece_update_list(f))
buffer = []
for piece, start, length in data_to_update:
if self.storagewrapper.has_data(piece):
data = self.storagewrapper.read_raw(piece, start, length)
if data is None:
return False
buffer.append((piece, start, data))
files_updated = False
try:
for f in xrange(self.numfiles):
if new_disabled[f] and not old_disabled[f]:
self.storage.disable_file(f)
files_updated = True
if old_disabled[f] and not new_disabled[f]:
self.storage.enable_file(f)
files_updated = True
except (IOError, OSError), e:
if new_disabled[f]:
msg = "can't open partial file for "
else:
msg = "unable to open "
self.failfunc(msg + self.files[f][0] + ": " + exceptionArgsToString(e))
return False
def _get_file_handle(self, file, for_write):
if self.handles.has_key(file):
if for_write and not self.whandles.has_key(file):
self._close(file)
try:
f = self._open(file, 'rb+')
self.handles[file] = f
self.whandles[file] = 1
self.lock_file(file, f)
except (IOError, OSError), e:
if DEBUG:
print_exc()
raise IOError('unable to reopen '+file+': '+exceptionArgsToString(e))
if self.handlebuffer:
if self.handlebuffer[-1] != file:
self.handlebuffer.remove(file)
self.handlebuffer.append(file)
elif self.handlebuffer is not None:
self.handlebuffer.append(file)
def init_priority(self, new_priority):
try:
assert len(new_priority) == self.numfiles
for v in new_priority:
assert type(v) in (type(0), type(0L))
assert v >= -1
assert v <= 2
except:
# print_exc()
return False
try:
files_updated = False
for f in xrange(self.numfiles):
if new_priority[f] < 0:
self.storage.disable_file(f)
files_updated = True
if files_updated:
self.storage.reset_file_status()
self.new_priority = new_priority
except (IOError, OSError), e:
self.failfunc("can't open partial file for " + self.files[f][0] + ": " + exceptionArgsToString(e))
return False
else:
try:
if for_write:
f = self._open(file, 'rb+')
self.handles[file] = f
self.whandles[file] = 1
self.lock_file(file, f)
else:
f = self._open(file, 'rb')
self.handles[file] = f
if self.lock_while_reading:
self.lock_file(file, f)
except (IOError, OSError), e:
if DEBUG:
print_exc()
raise IOError('unable to open '+file+': '+exceptionArgsToString(e))
if self.handlebuffer is not None:
self.handlebuffer.append(file)
if len(self.handlebuffer) > self.max_files_open:
self._close(self.handlebuffer.pop(0))
return self.handles[file]
def _reset_ranges(self):
self.ranges = []
for l in self.working_ranges:
self.ranges.extend(l)
self.begins = [i[0] for i in self.ranges]
