michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=8 et :
michael@0:  */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_ipc_SharedMemoryBasic_chromium_h
michael@0: #define mozilla_ipc_SharedMemoryBasic_chromium_h
michael@0: 
michael@0: #include "base/shared_memory.h"
michael@0: #include "SharedMemory.h"
michael@0: 
michael@0: #include "nsDebug.h"
michael@0: 
michael@0: //
michael@0: // This is a low-level wrapper around platform shared memory.  Don't
michael@0: // use it directly; use Shmem allocated through IPDL interfaces.
michael@0: //
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace ipc {
michael@0: 
michael@0: class SharedMemoryBasic : public SharedMemory
michael@0: {
michael@0: public:
michael@0:   typedef base::SharedMemoryHandle Handle;
michael@0: 
michael@0:   SharedMemoryBasic()
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   SharedMemoryBasic(const Handle& aHandle)
michael@0:     : mSharedMemory(aHandle, false)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   virtual bool Create(size_t aNbytes) MOZ_OVERRIDE
michael@0:   {
michael@0:     bool ok = mSharedMemory.Create("", false, false, aNbytes);
michael@0:     if (ok) {
michael@0:       Created(aNbytes);
michael@0:     }
michael@0:     return ok;
michael@0:   }
michael@0: 
michael@0:   virtual bool Map(size_t nBytes) MOZ_OVERRIDE
michael@0:   {
michael@0:     bool ok = mSharedMemory.Map(nBytes);
michael@0:     if (ok) {
michael@0:       Mapped(nBytes);
michael@0:     }
michael@0:     return ok;
michael@0:   }
michael@0: 
michael@0:   virtual void* memory() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return mSharedMemory.memory();
michael@0:   }
michael@0: 
michael@0:   virtual SharedMemoryType Type() const MOZ_OVERRIDE
michael@0:   {
michael@0:     return TYPE_BASIC;
michael@0:   }
michael@0: 
michael@0:   static Handle NULLHandle()
michael@0:   {
michael@0:     return base::SharedMemory::NULLHandle();
michael@0:   }
michael@0: 
michael@0:   static bool IsHandleValid(const Handle &aHandle)
michael@0:   {
michael@0:     return base::SharedMemory::IsHandleValid(aHandle);
michael@0:   }
michael@0: 
michael@0:   bool ShareToProcess(base::ProcessHandle process,
michael@0:                       Handle* new_handle)
michael@0:   {
michael@0:     base::SharedMemoryHandle handle;
michael@0:     bool ret = mSharedMemory.ShareToProcess(process, &handle);
michael@0:     if (ret)
michael@0:       *new_handle = handle;
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   base::SharedMemory mSharedMemory;
michael@0: };
michael@0: 
michael@0: } // namespace ipc
michael@0: } // namespace mozilla
michael@0: 
michael@0: 
michael@0: #endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h