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#
# RTEMS heap
#
class block:
'''Abstract a heap block structure'''
def __init__(self, blk):
self.block = blk
self.prev_size = self.block['prev_size']
self.size_flag = self.block['size_and_flag']
def null(self):
if self.block:
return False
return True
def next(self):
if not self.null():
self.block = self.block['next']
def prev(self):
if not self.null():
self.block = self.block['prev']
class stats:
''heap statistics''
def __init__(self,stat):
self.stat = stat
def avail(self):
val = self.stat['size']
return val
def free(self):
return self.stat['free_size']
# ToDo : incorporate others
def control:
'''Abstract a heap control structure'''
def __init__(self, ctl):
self.ctl = ctl
def first(self):
b = block(self.ctl['first_block'])
return b
def last(self):
b = block(self.ctl['last_block'])
return b
def free(self):
b = block(self.ctl['free_list'])
return b
def stat(self):
st = stats(self.ctl['stats'])
return st
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