src/python/swig/pyobject.cc

   1 /*
   2  * Copyright (c) 2006 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  */
  30
  31 #include <Python.h>
  32
  33 #include <string>
  34
  35 #include "base/inifile.hh"
  36 #include "base/output.hh"
  37 #include "mem/mem_object.hh"
  38 #include "mem/port.hh"
  39 #include "sim/builder.hh"
  40 #include "sim/sim_object.hh"
  41
  42 using namespace std;
  43
  44 /**
  45  * Look up a MemObject port.  Helper function for connectPorts().
  46  */
  47 Port *
  48 lookupPort(SimObject *so, const std::string &name, int i)
  49 {
  50     MemObject *mo = dynamic_cast<MemObject *>(so);
  51     if (mo == NULL) {
  52         warn("error casting SimObject %s to MemObject", so->name());
  53         return NULL;
  54     }
  55
  56     Port *p = mo->getPort(name, i);
  57     if (p == NULL)
  58         warn("error looking up port %s on object %s", name, so->name());
  59     return p;
  60 }
  61
  62
  63 /**
  64  * Connect the described MemObject ports.  Called from Python via SWIG.
  65  */
  66 int
  67 connectPorts(SimObject *o1, const std::string &name1, int i1,
  68              SimObject *o2, const std::string &name2, int i2)
  69 {
  70     Port *p1 = lookupPort(o1, name1, i1);
  71     Port *p2 = lookupPort(o2, name2, i2);
  72
  73     if (p1 == NULL || p2 == NULL) {
  74         warn("connectPorts: port lookup error");
  75         return 0;
  76     }
  77
  78     p1->setPeer(p2);
  79     p2->setPeer(p1);
  80
  81     return 1;
  82 }
  83
  84 inline IniFile &
  85 inifile()
  86 {
  87     static IniFile inifile;
  88     return inifile;
  89 }
  90
  91 SimObject *
  92 createSimObject(const string &name)
  93 {
  94     return SimObjectClass::createObject(inifile(), name);
  95 }
  96
  97 /**
  98  * Pointer to the Python function that maps names to SimObjects.
  99  */
 100 PyObject *resolveFunc = NULL;
 101
 102 /**
 103  * Convert a pointer to the Python object that SWIG wraps around a C++
 104  * SimObject pointer back to the actual C++ pointer.  See main.i.
 105  */
 106 extern "C" SimObject *convertSwigSimObjectPtr(PyObject *);
 107
 108 SimObject *
 109 resolveSimObject(const string &name)
 110 {
 111     PyObject *pyPtr = PyEval_CallFunction(resolveFunc, "(s)", name.c_str());
 112     if (pyPtr == NULL) {
 113         PyErr_Print();
 114         panic("resolveSimObject: failure on call to Python for %s", name);
 115     }
 116
 117     SimObject *simObj = convertSwigSimObjectPtr(pyPtr);
 118     if (simObj == NULL)
 119         panic("resolveSimObject: failure on pointer conversion for %s", name);
 120
 121     return simObj;
 122 }
 123
 124 /**
 125  * Load config.ini into C++ database.  Exported to Python via SWIG;
 126  * invoked from m5.instantiate().
 127  */
 128 void
 129 loadIniFile(PyObject *_resolveFunc)
 130 {
 131     resolveFunc = _resolveFunc;
 132     configStream = simout.find("config.out");
 133
 134     // The configuration database is now complete; start processing it.
 135     inifile().load(simout.resolve("config.ini"));
 136 }
 137