private void GlobalInit()
{
error = "创建内存监视对象";
GlobaCacherlInitializer.Init(_session);
_startProgress.PrintStartInfo("正在创建内存监视对象......");
MemoryIsEnoughChecker._session = _session;
Parallel.Invoke(() => { PerformanceMonitoring.GetAvailableRAM(); });
}
private bool CheckMemory(string strRasName)
{
float availableSize = PerformanceMonitoring.GetAvailableRAM();
if (availableSize < 0)
{
return(true);
}
int memoryOfTile, tileCount;
float requiredSize = RasterDrawing.EstimateRequiredMemory(strRasName, out memoryOfTile, out tileCount);
IRasterDataProvider prd = GeoDataDriver.Open(strRasName) as IRasterDataProvider;
int nHeight = prd.Height;
int nWidth = prd.Width;
enumDataType dataType = prd.DataType;
int nByteCount = DataTypeHelper.SizeOf(dataType);
requiredSize = requiredSize * 2 + nByteCount * nHeight * nWidth / 1024 / 1024;
if (availableSize < requiredSize + 200)//预留200MB
{
return(false);
}
else //内存碎片的可能性非常大，需要先尝试内存申请能否成功
{
for (int i = 0; i < tileCount; i++)
{
try
{
byte[] tileBuffer = new byte[memoryOfTile];
}
catch
{
return(false);
}
}
try
{
byte[] dataBuffer = new byte[nByteCount * nHeight * nWidth];
}
catch
{
return(false);
}
return(true);
}
}
public static bool MemoryIsEnoughForRaster(string rasterFileName)
{
float availableSize = PerformanceMonitoring.GetAvailableRAM();
if (availableSize < 0)
{
return(true);
}
int memoryOfTile, tileCount;
float requiredSize = RasterDrawing.EstimateRequiredMemory(rasterFileName, out memoryOfTile, out tileCount);
int countOfDrawing = 0;
float memoryOfLoading = GetMemoryOfTileLoading(out countOfDrawing);
//Console.WriteLine("AvailableSize:" + availableSize.ToString() + " , RequiredSize:" + requiredSize.ToString() + " , SizeOfLoading:" + memoryOfLoading.ToString());
availableSize -= memoryOfLoading;
int host_min_mem_size = HOST_MIN_MEMORY_SIZE;
if (countOfDrawing == 0)
{
host_min_mem_size = 0;
}
if (availableSize < requiredSize + host_min_mem_size)//预留200MB
{
return(false);
}
else if (availableSize < requiredSize)//内存碎片的可能性非常大，需要先尝试内存申请能否成功
{
for (int i = 0; i < tileCount; i++)
{
try
{
byte[] tileBuffer = new byte[memoryOfTile];
}
catch
{
Console.WriteLine("内存空间足够，但因内存碎片无法申请成功空间。");
return(false);
}
}
return(true);
}
else
{
return(true);
}
}
private const int HOST_MIN_MEMORY_SIZE = 200;//MB
public static bool MemoryIsEnoughForVector(string vectorFileName)
{
if (CodeCell.AgileMap.Core.GlobalCacher.VectorDataGlobalCacher.GetData(vectorFileName) != null)
{
return(true);
}
float availableSize = PerformanceMonitoring.GetAvailableRAM();
if (availableSize < 0)
{
return(true);
}
FileInfo fInfo = new FileInfo(vectorFileName);
float requiredSize = 10 * fInfo.Length / 1024f / 1024f; //矢量文件大小的10倍
if (availableSize < requiredSize)
{
return(false);
}
return(true);
}