arguments.hh revision 9850:87d6b41749e9 
1/*
2 * Copyright (c) 2003-2005 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#ifndef __SIM_ARGUMENTS_HH__
32#define __SIM_ARGUMENTS_HH__
33
34#include <cassert>
35
36#include "base/refcnt.hh"
37#include "base/types.hh"
38#include "mem/fs_translating_port_proxy.hh"
39
40class ThreadContext;
41
42class Arguments
43{
44  protected:
45    ThreadContext *tc;
46    int number;
47    uint64_t getArg(uint16_t size = (uint16_t)(-1), bool fp = false);
48
49  protected:
50    class Data : public RefCounted
51    {
52      public:
53        Data(){}
54        ~Data();
55
56      private:
57        std::list<char *> data;
58
59      public:
60        char *alloc(size_t size);
61    };
62
63    RefCountingPtr<Data> data;
64
65  public:
66    Arguments(ThreadContext *ctx, int n = 0)
67        : tc(ctx), number(n), data(NULL)
68        { assert(number >= 0); data = new Data;}
69    Arguments(const Arguments &args)
70        : tc(args.tc), number(args.number), data(args.data) {}
71    ~Arguments() {}
72
73    ThreadContext *getThreadContext() const { return tc; }
74
75    const Arguments &operator=(const Arguments &args) {
76        tc = args.tc;
77        number = args.number;
78        data = args.data;
79        return *this;
80    }
81
82    // for checking if an argument is NULL
83    bool operator!() {
84        return getArg() == 0;
85    }
86
87    Arguments &operator++() {
88        ++number;
89        assert(number >= 0);
90        return *this;
91    }
92
93    Arguments operator++(int) {
94        Arguments args = *this;
95        ++number;
96        assert(number >= 0);
97        return args;
98    }
99
100    Arguments &operator--() {
101        --number;
102        assert(number >= 0);
103        return *this;
104    }
105
106    Arguments operator--(int) {
107        Arguments args = *this;
108        --number;
109        assert(number >= 0);
110        return args;
111    }
112
113    const Arguments &operator+=(int index) {
114        number += index;
115        assert(number >= 0);
116        return *this;
117    }
118
119    const Arguments &operator-=(int index) {
120        number -= index;
121        assert(number >= 0);
122        return *this;
123    }
124
125    Arguments operator[](int index) {
126        return Arguments(tc, index);
127    }
128
129    template <class T>
130    operator T() {
131        assert(sizeof(T) <= sizeof(uint64_t));
132        T d = static_cast<T>(getArg(sizeof(T)));
133        return d;
134    }
135
136    template <class T>
137    operator T *() {
138        T *buf = (T *)data->alloc(sizeof(T));
139        CopyOut(tc, buf, getArg(sizeof(T)), sizeof(T));
140        return buf;
141    }
142
143    operator char *() {
144        char *buf = data->alloc(2048);
145        CopyStringOut(tc, buf, getArg(), 2048);
146        return buf;
147    }
148};
149
150#endif // __SIM_ARGUMENTS_HH__
151