src/sim/syscallreturn.hh

   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: Gabe Black
  29  */
  30
  31 #ifndef __SIM_SYSCALLRETURN_HH__
  32 #define __SIM_SYSCALLRETURN_HH__
  33
  34 #include "base/types.hh"
  35
  36 class SyscallReturn
  37 {
  38   public:
  39     template <class T>
  40     SyscallReturn(T v, bool s)
  41     {
  42         retval = (uint64_t)v;
  43         success = s;
  44     }
  45
  46     template <class T>
  47     SyscallReturn(T v)
  48     {
  49         success = (v >= 0);
  50         retval = (uint64_t)v;
  51     }
  52
  53     ~SyscallReturn() {}
  54
  55     SyscallReturn& operator=(const SyscallReturn& s)
  56     {
  57         retval = s.retval;
  58         success = s.success;
  59         return *this;
  60     }
  61
  62     bool successful() { return success; }
  63     uint64_t value() { return retval; }
  64
  65     private:
  66     uint64_t retval;
  67     bool success;
  68 };
  69
  70 #endif