Line data    Source code

       1             : /* Copyright (C) 2009 Wildfire Games.
       2             :  * This file is part of 0 A.D.
       3             :  *
       4             :  * 0 A.D. is free software: you can redistribute it and/or modify
       5             :  * it under the terms of the GNU General Public License as published by
       6             :  * the Free Software Foundation, either version 2 of the License, or
       7             :  * (at your option) any later version.
       8             :  *
       9             :  * 0 A.D. is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :  * GNU General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU General Public License
      15             :  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
      16             :  */
      17             : 
      18             : #ifndef INCLUDED_SHAREDMEMORY
      19             : #define INCLUDED_SHAREDMEMORY
      20             : 
      21             : // we want to use placement new without grief
      22             : // (Duplicated in Shareable.h)
      23             : #undef new
      24             : 
      25             : namespace AtlasMessage
      26             : {
      27             : 
      28             : // Shared pointers need to be allocated and freed from the same heap.
      29             : // So, both sides of the Shareable interface should set these function pointers
      30             : // to point to the same function. (The game will have to dynamically load them
      31             : // from the DLL.)
      32             : extern void* (*ShareableMallocFptr) (size_t n);
      33             : extern void (*ShareableFreeFptr) (void* p);
      34             : 
      35             : // Implement shared new/delete on top of those
      36             : template<typename T> T* ShareableNew()
      37             : {
      38             :     T* p = (T*)ShareableMallocFptr(sizeof(T));
      39             :     new (p) T;
      40             :     return p;
      41             : }
      42           0 : template<typename T> void ShareableDelete(T* p)
      43             : {
      44           0 :     p->~T();
      45           0 :     ShareableFreeFptr(p);
      46           0 : }
      47             : // Or maybe we want to use a non-default constructor
      48             : #define SHAREABLE_NEW(T, data) (new ( (T*)AtlasMessage::ShareableMallocFptr(sizeof(T)) ) T data)
      49             : 
      50             : }
      51             : 
      52             : #endif // INCLUDED_SHAREDMEMORY