ShareMemory
Code
Copied!
//
// Copyright (c) 2021 - 2025 Advanced Micro Devices, Inc. All rights reserved.
//
//-------------------------------------------------------------------------------------------------
#include <Windows.h>
#include "GlobalDefs.h"
static HANDLE g_SharedFile = NULL;
static PVOID g_SharedBuffer = NULL;
// Create shared memory
BOOL ShmCreate (WCHAR* shmFileName, ULONG sharedFilesize)
{
SECURITY_DESCRIPTOR sd;
SECURITY_ATTRIBUTES sa;
// N.B: After setting this permission, the general application does not have administrator privileges
// In order to start to open mapping g_SharedFile Otherwise Access Denny
InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl (&sd, TRUE, (PACL)NULL, FALSE);
sa.nLength = sizeof (SECURITY_ATTRIBUTES);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = &sd;
HANDLE g_SharedFile = CreateFileMappingW (INVALID_HANDLE_VALUE, &sa, PAGE_READWRITE, 0, sharedFilesize, shmFileName);
if (g_SharedFile == NULL)
{
XTrace (L"ADLX Call Service: ShareMem::Create: CreateFileMappingW, error: %d\\n", GetLastError());
return FALSE;
}
LPVOID g_SharedBuffer = MapViewOfFile (g_SharedFile, FILE_MAP_ALL_ACCESS, 0, 0, sharedFilesize);
if (g_SharedBuffer == NULL)
{
XTrace (L"ADLX Call Service: ShareMem::Create: MapViewOfFile, error: %d\\n", GetLastError ());
return FALSE;
}
XTrace (L"ADLX Call Service: ShareMem::Create: OK\\n");
return TRUE;
}
// Destory shared memory
VOID ShmDestory ()
{
if (g_SharedBuffer)
{
UnmapViewOfFile (g_SharedBuffer);
g_SharedBuffer = NULL;
}
if (g_SharedFile)
{
CloseHandle (g_SharedFile);
g_SharedFile = NULL;
}
}
// Write data to shared memory
BOOL ShmWriteBuffer (WCHAR* shmFileName, PVOID buffer, ULONG size)
{
HANDLE shmFile = OpenFileMappingW (FILE_MAP_ALL_ACCESS, FALSE, shmFileName);
if (shmFile)
{
LPVOID g_SharedBuffer = MapViewOfFile (shmFile, FILE_MAP_ALL_ACCESS, 0, 0, size);
if (g_SharedBuffer)
{
memcpy_s (g_SharedBuffer, size, buffer, size);
return TRUE;
}
}
return FALSE;
}
// Read data from shared memory
BOOL ShmReadBuffer (WCHAR* shmFileName, PVOID buffer, ULONG size)
{
SECURITY_DESCRIPTOR sd;
SECURITY_ATTRIBUTES sa;
InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl (&sd, TRUE, (PACL)NULL, FALSE);
sa.nLength = sizeof (SECURITY_ATTRIBUTES);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = &sd;
BOOL result = FALSE;
HANDLE g_SharedFile = OpenFileMappingW (FILE_MAP_ALL_ACCESS, FALSE, shmFileName);
if (g_SharedFile)
{
g_SharedBuffer = MapViewOfFile (g_SharedFile, FILE_MAP_ALL_ACCESS, 0, 0, size);
if (g_SharedBuffer)
{
memcpy_s (buffer, size, g_SharedBuffer, size);
result = TRUE;
}
}
return result;
}
