internal static void Check(int minFreeMemoryPercentage)
 {
     if ((minFreeMemoryPercentage >= 1) && (minFreeMemoryPercentage <= 0x63))
     {
         UnsafeNativeMethods.MEMORYSTATUSEX memoryStatus = new UnsafeNativeMethods.MEMORYSTATUSEX();
         GetGlobalMemoryStatus(ref memoryStatus);
         ulong num = (memoryStatus.ullTotalPageFile / ((ulong) 100L)) * minFreeMemoryPercentage;
         if (memoryStatus.ullAvailPageFile < num)
         {
             Thread.Sleep(0);
             uint sizeToAlloc = 0;
             if (num < 0x7fffffffL)
             {
                 sizeToAlloc = (((uint) num) / 2) * 3;
             }
             if (sizeToAlloc > 0)
             {
                 ForcePageFileToGrow(sizeToAlloc);
                 GetGlobalMemoryStatus(ref memoryStatus);
                 num = (memoryStatus.ullTotalPageFile / ((ulong) 100L)) * minFreeMemoryPercentage;
             }
             if (memoryStatus.ullAvailPageFile < num)
             {
                 throw FxTrace.Exception.AsError(new InsufficientMemoryException(System.ServiceModel.Activation.SR.Hosting_MemoryGatesCheckFailed(memoryStatus.ullAvailPageFile, minFreeMemoryPercentage)));
             }
         }
     }
 }
        internal static bool Check(int minFreeMemoryPercentage, bool throwOnLowMemory, out ulong availableMemoryBytes)
        {
            // Boundary check percentage, if out of bounds Gate is turned off.
            // 0 is defined as disabled. Configuration defines 99 as max allowed so we disable 
            // if we receive something out of range
            availableMemoryBytes = 0;
            if (minFreeMemoryPercentage < 1 || minFreeMemoryPercentage > 99)
            {
                return true;
            }

            UnsafeNativeMethods.MEMORYSTATUSEX memoryStatus = new UnsafeNativeMethods.MEMORYSTATUSEX();
            GetGlobalMemoryStatus(ref memoryStatus);

            if (memoryStatus.ullAvailVirtual < (memoryStatus.ullTotalVirtual / 100 * (ulong)minFreeMemoryPercentage))
            {
                availableMemoryBytes = memoryStatus.ullAvailVirtual;
            }
            else if (memoryStatus.ullAvailPhys < (memoryStatus.ullTotalPhys / 100 * (ulong)minFreeMemoryPercentage))
            {
                availableMemoryBytes = memoryStatus.ullAvailPhys;
            }

            if (TD.ServiceActivationAvailableMemoryIsEnabled())
            {
                TD.ServiceActivationAvailableMemory(availableMemoryBytes);
            }

            if (availableMemoryBytes != 0)
            {
                if (throwOnLowMemory)
                {
                    throw FxTrace.Exception.AsError(new InsufficientMemoryException(
                        SR.Hosting_MemoryGatesCheckFailed(availableMemoryBytes,
                        minFreeMemoryPercentage)));
                }
                else
                {
                    return false;
                }
            }

            return true;
        }