/// <summary>Linux specific implementation of <see cref="Memory.GetRamUsageInfo"/> </summary>
internal static int GetRamUsageInfo(ref RamUsageInfo buffer)
{
try
{
string[] lines = System.IO.File.ReadAllLines("/proc/meminfo");
string memTotalLine = lines.FirstOrDefault(line => line.StartsWith("MemTotal:"));
string memAvailableLine = lines.FirstOrDefault(line => line.StartsWith("MemAvailable:"));
buffer.TotalBytes = ExtractValue(memTotalLine) * 1024;
buffer.FreeBytes = ExtractValue(memAvailableLine) * 1024;
return(0);
}
#pragma warning disable
catch (IOException)
{
return(ERROR);
}
#pragma warning restore
ulong ExtractValue(string line)
{
return(line != null && ulong.TryParse(line.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)[1], out var val)
? val
: 0);
}
}
internal static int GetRamUsageInfo(ref RamUsageInfo buffer)
{
var buf = new MacRamUsageInfo();
var ret = GetRamUsageInfo(ref buf, Marshal.SizeOf(buf));
if (ret != 0)
{
return(ERROR);
}
buffer.TotalBytes = s_totalMemoryBytes.Value;
buffer.FreeBytes = s_totalMemoryBytes.Value - (buf.AppMemory + buf.Wired + buf.Compressed);
return(0);
}
/// <summary>Linux specific implementation of <see cref="Memory.GetRamUsageInfo"/> </summary>
internal static int GetRamUsageInfo(ref RamUsageInfo buffer)
{
var sysinfoBuf = new sysinfo_buf();
var ret = sysinfo(ref sysinfoBuf);
if (ret != 0)
{
return(ERROR);
}
buffer.TotalBytes = sysinfoBuf.totalram;
buffer.FreeBytes = sysinfoBuf.freeram;
return(0);
}
private double?GetAvailablePhysicalBytesMacOS(ulong totalPhysicalBytes)
{
double? availableAvailablePhysicalBytes = null;
RamUsageInfo ramUsageInfo = new RamUsageInfo();
// The 'free' portion of GetRamUsageInfo() indicates how many physical RAM is still available,
// we have to look at VM statistics to calculate the actual available RAM though
if (GetRamUsageInfo(ref ramUsageInfo) == MACOS_INTEROP_SUCCESS)
{
availableAvailablePhysicalBytes = totalPhysicalBytes
- ramUsageInfo.AppMemory
- ramUsageInfo.Wired
- ramUsageInfo.Compressed;
}
return(availableAvailablePhysicalBytes);
}
/// <summary>
/// Linux specific implementation of <see cref="Memory.GetRamUsageInfo"/> \
/// </summary>
internal static int GetRamUsageInfo(ref RamUsageInfo buffer)
{
try
{
string[] lines = System.IO.File.ReadAllLines($"{ProcPath}{ProcMemInfoPath}");
string memTotalLine = lines.FirstOrDefault(line => line.StartsWith("MemTotal:"));
string memAvailableLine = lines.FirstOrDefault(line => line.StartsWith("MemAvailable:"));
buffer.TotalBytes = ExtractValueFromProcLine(memTotalLine) * 1024;
buffer.FreeBytes = ExtractValueFromProcLine(memAvailableLine) * 1024;
return(0);
}
#pragma warning disable
catch (Exception)
{
return(ERROR);
}
#pragma warning restore
}
private double?GetAvailablePhysicalBytesMacOS()
{
double? availableAvailablePhysicalBytes = null;
RamUsageInfo ramUsageInfo = new RamUsageInfo();
unsafe
{
if (GetRamUsageInfo(&ramUsageInfo) == MACOS_INTEROP_SUCCESS)
{
// The 'free' portion of GetRamUsageInfo() indicates how many physical RAM is still available,
// we have to look at VM statistics to calculate the actual available RAM though, akin to ActivityMonitor on macOS.
availableAvailablePhysicalBytes =
OperatingSystemHelper.GetPhysicalMemorySize().Bytes - (ramUsageInfo.Active + ramUsageInfo.Speculative +
ramUsageInfo.Wired + ramUsageInfo.Compressed - ramUsageInfo.Purgable);
}
}
return(availableAvailablePhysicalBytes);
}
private double?GetAvailablePhysicalBytesMacOS(ulong totalPhysicalBytes)
{
double? availableAvailablePhysicalBytes = null;
RamUsageInfo ramUsageInfo = new RamUsageInfo();
// The 'free' portion of GetRamUsageInfo() indicates how many physical RAM is still available,
// we have to look at VM statistics to calculate the actual available RAM though
if (GetRamUsageInfo(ref ramUsageInfo) == MACOS_INTEROP_SUCCESS)
{
// OLD formula based on Active pages (does not coincide with Activity Monitor)
//availableAvailablePhysicalBytes =
// totalPhysicalBytes - (ramUsageInfo.Active + ramUsageInfo.Speculative +
// ramUsageInfo.Wired + ramUsageInfo.Compressed - ramUsageInfo.Purgable);
// "Physical Memory" - "Memory Used" from Activity Monitor
availableAvailablePhysicalBytes = totalPhysicalBytes
- ramUsageInfo.AppMemory
- ramUsageInfo.Wired
- ramUsageInfo.Compressed;
}
return(availableAvailablePhysicalBytes);
}
/// <summary>
/// Returns the current host memory usage information to the caller
/// </summary>
/// <param name="buffer">A RamUsageInfo struct pointer to hold memory statistics</param>
public static int GetRamUsageInfo(ref RamUsageInfo buffer) => IsMacOS
? Impl_Mac.GetRamUsageInfo(ref buffer)
: Impl_Linux.GetRamUsageInfo(ref buffer);
/// <summary> /// Returns the current host memory usage information to the caller /// </summary> /// <param name="buffer">A RamUsageInfo struct pointer to hold memory statistics</param> public static int GetRamUsageInfo(ref RamUsageInfo buffer) => GetRamUsageInfo(ref buffer, Marshal.SizeOf(buffer));
private static extern int GetRamUsageInfo(ref RamUsageInfo buffer, long bufferSize);
