Exemplo n.º 1
0
static HRESULT CreateTempEvent(const wchar_t *name,
    NSynchronization::CManualResetEvent &event, UString &eventName)
{
  CRandom random;
  random.Init(GetTickCount());
  for (;;)
  {
    int number = random.Generate();
    wchar_t temp[32];
    ConvertUInt64ToString((UInt32)number, temp);
    eventName = name;
    eventName += temp;
    RINOK(event.CreateWithName(false, GetSystemString(eventName)));
    if (::GetLastError() != ERROR_ALREADY_EXISTS)
      return S_OK;
    event.Close();
  }
}
static HRESULT CreateMap(const UStringVector &names,
    CFileMapping &fileMapping, NSynchronization::CManualResetEvent &event,
    UString &params)
{
  size_t totalSize = 1;
  {
    FOR_VECTOR (i, names)
      totalSize += (names[i].Len() + 1);
  }
  totalSize *= sizeof(wchar_t);
  
  CRandNameGenerator random;

  UString mappingName;
  for (;;)
  {
    random.GenerateName(mappingName, "7zMap");

    WRes res = fileMapping.Create(PAGE_READWRITE, totalSize, GetSystemString(mappingName));
    if (fileMapping.IsCreated() && res == 0)
      break;
    if (res != ERROR_ALREADY_EXISTS)
      return res;
    fileMapping.Close();
  }
  
  UString eventName;
  for (;;)
  {
    random.GenerateName(eventName, "7zEvent");
    WRes res = event.CreateWithName(false, GetSystemString(eventName));
    if (event.IsCreated() && res == 0)
      break;
    if (res != ERROR_ALREADY_EXISTS)
      return res;
    event.Close();
  }

  params += L'#';
  params += mappingName;
  params += L':';
  char temp[32];
  ConvertUInt64ToString(totalSize, temp);
  params.AddAscii(temp);
  
  params += L':';
  params += eventName;

  LPVOID data = fileMapping.Map(FILE_MAP_WRITE, 0, totalSize);
  if (!data)
    return E_FAIL;
  CFileUnmapper unmapper(data);
  {
    wchar_t *cur = (wchar_t *)data;
    *cur++ = 0; // it means wchar_t strings (UTF-16 in WIN32)
    FOR_VECTOR (i, names)
    {
      const UString &s = names[i];
      unsigned len = s.Len() + 1;
      wmemcpy(cur, (const wchar_t *)s, len);
      cur += len;
    }
  }
  return S_OK;
}