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;
}