1# Copyright (c) 2004-2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Steve Reinhardt
28# Nathan Binkert
29
30#####################################################################
31#
32# Proxy object support.
33#
34#####################################################################
35
36import copy
37
38class BaseProxy(object):
39 def __init__(self, search_self, search_up):
40 self._search_self = search_self
41 self._search_up = search_up
42 self._multiplier = None
43
44 def __str__(self):
45 if self._search_self and not self._search_up:
46 s = 'Self'
47 elif not self._search_self and self._search_up:
48 s = 'Parent'
49 else:
50 s = 'ConfusedProxy'
51 return s + '.' + self.path()
52
53 def __setattr__(self, attr, value):
54 if not attr.startswith('_'):
55 raise AttributeError, \
56 "cannot set attribute '%s' on proxy object" % attr
57 super(BaseProxy, self).__setattr__(attr, value)
58
59 # support multiplying proxies by constants
60 def __mul__(self, other):
61 if not isinstance(other, (int, long, float)):
62 raise TypeError, "Proxy multiplier must be integer"
63 if self._multiplier == None:
64 self._multiplier = other
65 else:
66 # support chained multipliers
67 self._multiplier *= other
68 return self
69
70 __rmul__ = __mul__
71
72 def _mulcheck(self, result):
73 if self._multiplier == None:
74 return result
75 return result * self._multiplier
76
77 def unproxy(self, base):
78 obj = base
79 done = False
80
81 if self._search_self:
82 result, done = self.find(obj)
83
84 if self._search_up:
85 while not done:
86 obj = obj._parent
87 if not obj:
88 break
89 result, done = self.find(obj)
90
91 if not done:
92 raise AttributeError, \
93 "Can't resolve proxy '%s' of type '%s' from '%s'" % \
94 (self.path(), self._pdesc.ptype_str, base.path())
95
96 if isinstance(result, BaseProxy):
97 if result == self:
98 raise RuntimeError, "Cycle in unproxy"
99 result = result.unproxy(obj)
100
101 return self._mulcheck(result)
102
103 def getindex(obj, index):
104 if index == None:
105 return obj
106 try:
107 obj = obj[index]
108 except TypeError:
109 if index != 0:
110 raise
111 # if index is 0 and item is not subscriptable, just
112 # use item itself (so cpu[0] works on uniprocessors)
113 return obj
114 getindex = staticmethod(getindex)
115
116 # This method should be called once the proxy is assigned to a
117 # particular parameter or port to set the expected type of the
118 # resolved proxy
119 def set_param_desc(self, pdesc):
120 self._pdesc = pdesc
121
122class AttrProxy(BaseProxy):
123 def __init__(self, search_self, search_up, attr):
124 super(AttrProxy, self).__init__(search_self, search_up)
125 self._attr = attr
126 self._modifiers = []
127
128 def __getattr__(self, attr):
129 # python uses __bases__ internally for inheritance
130 if attr.startswith('_'):
131 return super(AttrProxy, self).__getattr__(self, attr)
132 if hasattr(self, '_pdesc'):
133 raise AttributeError, "Attribute reference on bound proxy"
134 # Return a copy of self rather than modifying self in place
135 # since self could be an indirect reference via a variable or
136 # parameter
137 new_self = copy.deepcopy(self)
138 new_self._modifiers.append(attr)
139 return new_self
140
141 # support indexing on proxies (e.g., Self.cpu[0])
142 def __getitem__(self, key):
143 if not isinstance(key, int):
144 raise TypeError, "Proxy object requires integer index"
145 if hasattr(self, '_pdesc'):
146 raise AttributeError, "Index operation on bound proxy"
147 new_self = copy.deepcopy(self)
148 new_self._modifiers.append(key)
149 return new_self
150
151 def find(self, obj):
152 try:
153 val = getattr(obj, self._attr)
154 except:
155 return None, False
156 while isproxy(val):
157 val = val.unproxy(obj)
158 for m in self._modifiers:
159 if isinstance(m, str):
160 val = getattr(val, m)
161 elif isinstance(m, int):
162 val = val[m]
163 else:
164 assert("Item must be string or integer")
165 while isproxy(val):
166 val = val.unproxy(obj)
167 return val, True
168
169 def path(self):
170 p = self._attr
171 for m in self._modifiers:
172 if isinstance(m, str):
173 p += '.%s' % m
174 elif isinstance(m, int):
175 p += '[%d]' % m
176 else:
177 assert("Item must be string or integer")
178 return p
179
180class AnyProxy(BaseProxy):
181 def find(self, obj):
182 return obj.find_any(self._pdesc.ptype)
183
184 def path(self):
185 return 'any'
186
| 1# Copyright (c) 2004-2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Steve Reinhardt
28# Nathan Binkert
29
30#####################################################################
31#
32# Proxy object support.
33#
34#####################################################################
35
36import copy
37
38class BaseProxy(object):
39 def __init__(self, search_self, search_up):
40 self._search_self = search_self
41 self._search_up = search_up
42 self._multiplier = None
43
44 def __str__(self):
45 if self._search_self and not self._search_up:
46 s = 'Self'
47 elif not self._search_self and self._search_up:
48 s = 'Parent'
49 else:
50 s = 'ConfusedProxy'
51 return s + '.' + self.path()
52
53 def __setattr__(self, attr, value):
54 if not attr.startswith('_'):
55 raise AttributeError, \
56 "cannot set attribute '%s' on proxy object" % attr
57 super(BaseProxy, self).__setattr__(attr, value)
58
59 # support multiplying proxies by constants
60 def __mul__(self, other):
61 if not isinstance(other, (int, long, float)):
62 raise TypeError, "Proxy multiplier must be integer"
63 if self._multiplier == None:
64 self._multiplier = other
65 else:
66 # support chained multipliers
67 self._multiplier *= other
68 return self
69
70 __rmul__ = __mul__
71
72 def _mulcheck(self, result):
73 if self._multiplier == None:
74 return result
75 return result * self._multiplier
76
77 def unproxy(self, base):
78 obj = base
79 done = False
80
81 if self._search_self:
82 result, done = self.find(obj)
83
84 if self._search_up:
85 while not done:
86 obj = obj._parent
87 if not obj:
88 break
89 result, done = self.find(obj)
90
91 if not done:
92 raise AttributeError, \
93 "Can't resolve proxy '%s' of type '%s' from '%s'" % \
94 (self.path(), self._pdesc.ptype_str, base.path())
95
96 if isinstance(result, BaseProxy):
97 if result == self:
98 raise RuntimeError, "Cycle in unproxy"
99 result = result.unproxy(obj)
100
101 return self._mulcheck(result)
102
103 def getindex(obj, index):
104 if index == None:
105 return obj
106 try:
107 obj = obj[index]
108 except TypeError:
109 if index != 0:
110 raise
111 # if index is 0 and item is not subscriptable, just
112 # use item itself (so cpu[0] works on uniprocessors)
113 return obj
114 getindex = staticmethod(getindex)
115
116 # This method should be called once the proxy is assigned to a
117 # particular parameter or port to set the expected type of the
118 # resolved proxy
119 def set_param_desc(self, pdesc):
120 self._pdesc = pdesc
121
122class AttrProxy(BaseProxy):
123 def __init__(self, search_self, search_up, attr):
124 super(AttrProxy, self).__init__(search_self, search_up)
125 self._attr = attr
126 self._modifiers = []
127
128 def __getattr__(self, attr):
129 # python uses __bases__ internally for inheritance
130 if attr.startswith('_'):
131 return super(AttrProxy, self).__getattr__(self, attr)
132 if hasattr(self, '_pdesc'):
133 raise AttributeError, "Attribute reference on bound proxy"
134 # Return a copy of self rather than modifying self in place
135 # since self could be an indirect reference via a variable or
136 # parameter
137 new_self = copy.deepcopy(self)
138 new_self._modifiers.append(attr)
139 return new_self
140
141 # support indexing on proxies (e.g., Self.cpu[0])
142 def __getitem__(self, key):
143 if not isinstance(key, int):
144 raise TypeError, "Proxy object requires integer index"
145 if hasattr(self, '_pdesc'):
146 raise AttributeError, "Index operation on bound proxy"
147 new_self = copy.deepcopy(self)
148 new_self._modifiers.append(key)
149 return new_self
150
151 def find(self, obj):
152 try:
153 val = getattr(obj, self._attr)
154 except:
155 return None, False
156 while isproxy(val):
157 val = val.unproxy(obj)
158 for m in self._modifiers:
159 if isinstance(m, str):
160 val = getattr(val, m)
161 elif isinstance(m, int):
162 val = val[m]
163 else:
164 assert("Item must be string or integer")
165 while isproxy(val):
166 val = val.unproxy(obj)
167 return val, True
168
169 def path(self):
170 p = self._attr
171 for m in self._modifiers:
172 if isinstance(m, str):
173 p += '.%s' % m
174 elif isinstance(m, int):
175 p += '[%d]' % m
176 else:
177 assert("Item must be string or integer")
178 return p
179
180class AnyProxy(BaseProxy):
181 def find(self, obj):
182 return obj.find_any(self._pdesc.ptype)
183
184 def path(self):
185 return 'any'
186
|