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don't always aquite lock when calling RuntimeInformation.OSArchitecture and OSArchitecture.ProcessArchitecture #39196

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merged 8 commits into from
Jul 14, 2020
Merged

don't always aquite lock when calling RuntimeInformation.OSArchitecture and OSArchitecture.ProcessArchitecture #39196

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2e7899a
don't always aquite lock when calling RuntimeInformation.OSArchitectu…
adamsitnik Jul 13, 2020
8bfba8b
make the arch fields volatile
adamsitnik Jul 13, 2020
aac655d
1 lock should be enough
adamsitnik Jul 13, 2020
02f254f
proper fix of the Unix code
adamsitnik Jul 13, 2020
49e0b8a
apply [SuppressGCTransition]
adamsitnik Jul 13, 2020
d5351ff
minor refactor
adamsitnik Jul 13, 2020
89696d2
simplify it further
adamsitnik Jul 13, 2020
deb1d80
remove the locks enitrely
adamsitnik Jul 13, 2020
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88 changes: 49 additions & 39 deletions ...ormation/src/System/Runtime/InteropServices/RuntimeInformation/RuntimeInformation.Unix.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,8 +11,8 @@ public static partial class RuntimeInformation
private static readonly object s_processLock = new object();
private static string? s_osPlatformName;
private static string? s_osDescription;
private static Architecture? s_osArch;
private static Architecture? s_processArch;
private static int s_osArch = -1;
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private static int s_processArch = -1;

public static bool IsOSPlatform(OSPlatform osPlatform)
{
Expand All @@ -26,69 +26,79 @@ public static Architecture OSArchitecture
{
get
{
lock (s_osLock)
Debug.Assert(sizeof(Architecture) == sizeof(int));

if (s_osArch == -1)
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{
if (null == s_osArch)
lock (s_osLock)
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{
Interop.Sys.ProcessorArchitecture arch = (Interop.Sys.ProcessorArchitecture)Interop.Sys.GetOSArchitecture();
switch (arch)
if (s_osArch == -1)
{
case Interop.Sys.ProcessorArchitecture.ARM:
s_osArch = Architecture.Arm;
break;
Interop.Sys.ProcessorArchitecture arch = (Interop.Sys.ProcessorArchitecture)Interop.Sys.GetOSArchitecture();
switch (arch)
{
case Interop.Sys.ProcessorArchitecture.ARM:
s_osArch = (int)Architecture.Arm;
break;

case Interop.Sys.ProcessorArchitecture.x64:
s_osArch = Architecture.X64;
break;
case Interop.Sys.ProcessorArchitecture.x64:
s_osArch = (int)Architecture.X64;
break;

case Interop.Sys.ProcessorArchitecture.x86:
s_osArch = Architecture.X86;
break;
case Interop.Sys.ProcessorArchitecture.x86:
s_osArch = (int)Architecture.X86;
break;

case Interop.Sys.ProcessorArchitecture.ARM64:
s_osArch = Architecture.Arm64;
break;
case Interop.Sys.ProcessorArchitecture.ARM64:
s_osArch = (int)Architecture.Arm64;
break;
}
}
}
}

Debug.Assert(s_osArch != null);
return s_osArch.Value;
Debug.Assert(s_osArch != -1);
return (Architecture)s_osArch;
}
}

public static Architecture ProcessArchitecture
{
get
{
lock (s_processLock)
Debug.Assert(sizeof(Architecture) == sizeof(int));

if (s_processArch == -1)
{
if (null == s_processArch)
lock (s_processLock)
{
Interop.Sys.ProcessorArchitecture arch = (Interop.Sys.ProcessorArchitecture)Interop.Sys.GetProcessArchitecture();
switch (arch)
if (s_processArch == -1)
{
case Interop.Sys.ProcessorArchitecture.ARM:
s_processArch = Architecture.Arm;
break;
Interop.Sys.ProcessorArchitecture arch = (Interop.Sys.ProcessorArchitecture)Interop.Sys.GetProcessArchitecture();
switch (arch)
{
case Interop.Sys.ProcessorArchitecture.ARM:
s_processArch = (int)Architecture.Arm;
break;

case Interop.Sys.ProcessorArchitecture.x64:
s_processArch = Architecture.X64;
break;
case Interop.Sys.ProcessorArchitecture.x64:
s_processArch = (int)Architecture.X64;
break;

case Interop.Sys.ProcessorArchitecture.x86:
s_processArch = Architecture.X86;
break;
case Interop.Sys.ProcessorArchitecture.x86:
s_processArch = (int)Architecture.X86;
break;

case Interop.Sys.ProcessorArchitecture.ARM64:
s_processArch = Architecture.Arm64;
break;
case Interop.Sys.ProcessorArchitecture.ARM64:
s_processArch = (int)Architecture.Arm64;
break;
}
}
}
}
}

Debug.Assert(s_processArch != null);
return s_processArch.Value;
Debug.Assert(s_processArch != -1);
return (Architecture)s_processArch;
}
}
}
Expand Down
95 changes: 52 additions & 43 deletions ...ation/src/System/Runtime/InteropServices/RuntimeInformation/RuntimeInformation.Windows.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,8 @@ public static partial class RuntimeInformation
private static string? s_osDescription;
private static readonly object s_osLock = new object();
private static readonly object s_processLock = new object();
private static Architecture? s_osArch;
private static Architecture? s_processArch;
private static int s_osArch = -1;
private static int s_processArch = -1;

public static bool IsOSPlatform(OSPlatform osPlatform)
{
Expand Down Expand Up @@ -42,68 +42,77 @@ public static Architecture OSArchitecture
{
get
{
lock (s_osLock)
Debug.Assert(sizeof(Architecture) == sizeof(int));

if (s_osArch == -1)
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{
if (null == s_osArch)
lock (s_osLock)
{
Interop.Kernel32.SYSTEM_INFO sysInfo;
Interop.Kernel32.GetNativeSystemInfo(out sysInfo);

switch ((Interop.Kernel32.ProcessorArchitecture)sysInfo.wProcessorArchitecture)
if (s_osArch == -1)
{
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM64:
s_osArch = Architecture.Arm64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM:
s_osArch = Architecture.Arm;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_AMD64:
s_osArch = Architecture.X64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_INTEL:
s_osArch = Architecture.X86;
break;
}
Interop.Kernel32.SYSTEM_INFO sysInfo;
Interop.Kernel32.GetNativeSystemInfo(out sysInfo);

switch ((Interop.Kernel32.ProcessorArchitecture)sysInfo.wProcessorArchitecture)
{
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM64:
s_osArch = (int)Architecture.Arm64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM:
s_osArch = (int)Architecture.Arm;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_AMD64:
s_osArch = (int)Architecture.X64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_INTEL:
s_osArch = (int)Architecture.X86;
break;
}
}
}
}

Debug.Assert(s_osArch != null);
return s_osArch.Value;
Debug.Assert(s_osArch != -1);
return (Architecture)s_osArch;
}
}

public static Architecture ProcessArchitecture
{
get
{
lock (s_processLock)
Debug.Assert(sizeof(Architecture) == sizeof(int));

if (s_processArch == -1)
{
if (null == s_processArch)
lock (s_processLock)
{
Interop.Kernel32.SYSTEM_INFO sysInfo;
Interop.Kernel32.GetSystemInfo(out sysInfo);

switch ((Interop.Kernel32.ProcessorArchitecture)sysInfo.wProcessorArchitecture)
if (s_processArch == -1)
{
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM64:
s_processArch = Architecture.Arm64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM:
s_processArch = Architecture.Arm;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_AMD64:
s_processArch = Architecture.X64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_INTEL:
s_processArch = Architecture.X86;
break;
Interop.Kernel32.SYSTEM_INFO sysInfo;
Interop.Kernel32.GetSystemInfo(out sysInfo);

switch ((Interop.Kernel32.ProcessorArchitecture)sysInfo.wProcessorArchitecture)
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{
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM64:
s_processArch = (int)Architecture.Arm64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_ARM:
s_processArch = (int)Architecture.Arm;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_AMD64:
s_processArch = (int)Architecture.X64;
break;
case Interop.Kernel32.ProcessorArchitecture.Processor_Architecture_INTEL:
s_processArch = (int)Architecture.X86;
break;
}
}
}
}

Debug.Assert(s_processArch != null);
return s_processArch.Value;
Debug.Assert(s_processArch != -1);
return (Architecture)s_processArch;
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}
}
}
Expand Down