Split config.py into multiple files.

Some tweaking to deal with mutually recursive imports.

--HG--
rename : src/python/m5/config.py => src/python/m5/SimObject.py
extra : convert_revision : 166f7bfabfd20100e93d26a89382469465859988

1 files changed, 193 insertions, 0 deletions

diff --git a/src/python/m5/proxy.py b/src/python/m5/proxy.py
new file mode 100644
index 000000000..5be50481c
--- /dev/null
+++ b/src/python/m5/proxy.py
@@ -0,0 +1,193 @@
+# Copyright (c) 2004-2006 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Steve Reinhardt
+#          Nathan Binkert
+
+#####################################################################
+#
+# Proxy object support.
+#
+#####################################################################
+
+class BaseProxy(object):
+    def __init__(self, search_self, search_up):
+        self._search_self = search_self
+        self._search_up = search_up
+        self._multiplier = None
+
+    def __setattr__(self, attr, value):
+        if not attr.startswith('_'):
+            raise AttributeError, 'cannot set attribute on proxy object'
+        super(BaseProxy, self).__setattr__(attr, value)
+
+    # support multiplying proxies by constants
+    def __mul__(self, other):
+        if not isinstance(other, (int, long, float)):
+            raise TypeError, "Proxy multiplier must be integer"
+        if self._multiplier == None:
+            self._multiplier = other
+        else:
+            # support chained multipliers
+            self._multiplier *= other
+        return self
+
+    __rmul__ = __mul__
+
+    def _mulcheck(self, result):
+        if self._multiplier == None:
+            return result
+        return result * self._multiplier
+
+    def unproxy(self, base):
+        obj = base
+        done = False
+
+        if self._search_self:
+            result, done = self.find(obj)
+
+        if self._search_up:
+            while not done:
+                obj = obj._parent
+                if not obj:
+                    break
+                result, done = self.find(obj)
+
+        if not done:
+            raise AttributeError, \
+                  "Can't resolve proxy '%s' of type '%s' from '%s'" % \
+                  (self.path(), self._pdesc.ptype_str, base.path())
+
+        if isinstance(result, BaseProxy):
+            if result == self:
+                raise RuntimeError, "Cycle in unproxy"
+            result = result.unproxy(obj)
+
+        return self._mulcheck(result)
+
+    def getindex(obj, index):
+        if index == None:
+            return obj
+        try:
+            obj = obj[index]
+        except TypeError:
+            if index != 0:
+                raise
+            # if index is 0 and item is not subscriptable, just
+            # use item itself (so cpu[0] works on uniprocessors)
+        return obj
+    getindex = staticmethod(getindex)
+
+    def set_param_desc(self, pdesc):
+        self._pdesc = pdesc
+
+class AttrProxy(BaseProxy):
+    def __init__(self, search_self, search_up, attr):
+        super(AttrProxy, self).__init__(search_self, search_up)
+        self._attr = attr
+        self._modifiers = []
+
+    def __getattr__(self, attr):
+        # python uses __bases__ internally for inheritance
+        if attr.startswith('_'):
+            return super(AttrProxy, self).__getattr__(self, attr)
+        if hasattr(self, '_pdesc'):
+            raise AttributeError, "Attribute reference on bound proxy"
+        self._modifiers.append(attr)
+        return self
+
+    # support indexing on proxies (e.g., Self.cpu[0])
+    def __getitem__(self, key):
+        if not isinstance(key, int):
+            raise TypeError, "Proxy object requires integer index"
+        self._modifiers.append(key)
+        return self
+
+    def find(self, obj):
+        try:
+            val = getattr(obj, self._attr)
+        except:
+            return None, False
+        while isproxy(val):
+            val = val.unproxy(obj)
+        for m in self._modifiers:
+            if isinstance(m, str):
+                val = getattr(val, m)
+            elif isinstance(m, int):
+                val = val[m]
+            else:
+                assert("Item must be string or integer")
+            while isproxy(val):
+                val = val.unproxy(obj)
+        return val, True
+
+    def path(self):
+        p = self._attr
+        for m in self._modifiers:
+            if isinstance(m, str):
+                p += '.%s' % m
+            elif isinstance(m, int):
+                p += '[%d]' % m
+            else:
+                assert("Item must be string or integer")
+        return p
+
+class AnyProxy(BaseProxy):
+    def find(self, obj):
+        return obj.find_any(self._pdesc.ptype)
+
+    def path(self):
+        return 'any'
+
+def isproxy(obj):
+    if isinstance(obj, (BaseProxy, params.EthernetAddr)):
+        return True
+    elif isinstance(obj, (list, tuple)):
+        for v in obj:
+            if isproxy(v):
+                return True
+    return False
+
+class ProxyFactory(object):
+    def __init__(self, search_self, search_up):
+        self.search_self = search_self
+        self.search_up = search_up
+
+    def __getattr__(self, attr):
+        if attr == 'any':
+            return AnyProxy(self.search_self, self.search_up)
+        else:
+            return AttrProxy(self.search_self, self.search_up, attr)
+
+# global objects for handling proxies
+Parent = ProxyFactory(search_self = False, search_up = True)
+Self = ProxyFactory(search_self = True, search_up = False)
+
+# limit exports on 'from proxy import *'
+__all__ = ['Parent', 'Self']
+
+# see comment on imports at end of __init__.py.
+import params # for EthernetAddr