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#ifdef _WIN32
#include "Win32SharedMemory.h"
#include "Bullet3Common/b3Logging.h"
#include "Bullet3Common/b3Scalar.h"
#include <windows.h>
//see also https://msdn.microsoft.com/en-us/library/windows/desktop/aa366551%28v=vs.85%29.aspx
//TCHAR szName[]=TEXT("Global\\MyFileMappingObject2");
TCHAR szName[]=TEXT("MyFileMappingObject2");
struct Win32SharedMemoryInteralData
{
HANDLE m_hMapFile;
void* m_buf;
Win32SharedMemoryInteralData()
:m_hMapFile(0),
m_buf(0)
{
}
};
Win32SharedMemory::Win32SharedMemory()
{
m_internalData = new Win32SharedMemoryInteralData;
}
Win32SharedMemory::~Win32SharedMemory()
{
delete m_internalData;
}
void* Win32SharedMemory::allocateSharedMemory(int key, int size, bool allowCreation)
{
b3Assert(m_internalData->m_buf==0);
m_internalData->m_hMapFile = OpenFileMapping(
FILE_MAP_ALL_ACCESS, // read/write access
FALSE, // do not inherit the name
szName); // name of mapping object
if (m_internalData->m_hMapFile==NULL)
{
if (allowCreation)
{
m_internalData->m_hMapFile = CreateFileMapping(
INVALID_HANDLE_VALUE, // use paging file
NULL, // default security
PAGE_READWRITE, // read/write access
0, // maximum object size (high-order DWORD)
size, // maximum object size (low-order DWORD)
szName); // name of mapping object
} else
{
b3Error("Could not create file mapping object (%d).\n",GetLastError());
return 0;
}
}
m_internalData->m_buf = MapViewOfFile(m_internalData->m_hMapFile, // handle to map object
FILE_MAP_ALL_ACCESS, // read/write permission
0,
0,
size);
if (m_internalData->m_buf == NULL)
{
b3Error("Could not map view of file (%d).\n",GetLastError());
CloseHandle(m_internalData->m_hMapFile);
return 0;
}
return m_internalData->m_buf;
}
void Win32SharedMemory::releaseSharedMemory(int key, int size)
{
if (m_internalData->m_buf)
{
UnmapViewOfFile(m_internalData->m_buf);
m_internalData->m_buf=0;
}
if (m_internalData->m_hMapFile)
{
CloseHandle(m_internalData->m_hMapFile);
m_internalData->m_hMapFile = 0;
}
}
Win32SharedMemoryServer::Win32SharedMemoryServer()
{
}
Win32SharedMemoryServer::~Win32SharedMemoryServer()
{
}
Win32SharedMemoryClient::Win32SharedMemoryClient()
{
}
Win32SharedMemoryClient:: ~Win32SharedMemoryClient()
{
}
#endif //_WIN32
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