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using System;
using System.Globalization;
using System.Runtime.CompilerServices;
namespace System.Runtime.Versioning
{
public static class CompatibilitySwitch
{
/* This class contains 3 sets of api:
* 1. internal apis : These apis are supposed to be used by mscorlib.dll and other assemblies which use the <runtime> section in config
* These apis query for the value of quirk not only in windows quirk DB but also in runtime section of config files,
* registry and environment vars.
* 2. public apis : These apis are supposed to be used by FX assemblies which do not read the runtime section of config files and have
* have their own section in config files or do not use configs at all.
*
* 3. specialized apis: These apis are defined in order to retrieve a specific value defined in CLR Config. That value can have specific look-up rules
* for the order and location of the config sources used.
*
* These apis are for internal use only for FX assmeblies. It has not been decided if they can be used by OOB components due to EULA restrictions
*/
[System.Security.SecurityCritical]
public static bool IsEnabled(string compatibilitySwitchName)
{
return IsEnabledInternalCall(compatibilitySwitchName, true);
}
[System.Security.SecurityCritical]
public static string GetValue(string compatibilitySwitchName)
{
// This is used by AppContext.TryGetSwitch to check switch overrides in the Windows Quirk DB
// If this method is updated to check other locations than the DB, please ensure compat with
// the AppContext class.
return GetValueInternalCall(compatibilitySwitchName, true);
}
[System.Security.SecurityCritical]
internal static bool IsEnabledInternal(string compatibilitySwitchName)
{
return IsEnabledInternalCall(compatibilitySwitchName, false);
}
[System.Security.SecurityCritical]
internal static string GetValueInternal(string compatibilitySwitchName)
{
return GetValueInternalCall(compatibilitySwitchName, false);
}
[System.Security.SecurityCritical]
[MethodImpl(MethodImplOptions.InternalCall)]
internal static extern string GetAppContextOverridesInternalCall();
[MethodImpl(MethodImplOptions.InternalCall)]
private static extern bool IsEnabledInternalCall(string compatibilitySwitchName, bool onlyDB);
[MethodImpl(MethodImplOptions.InternalCall)]
private static extern string GetValueInternalCall(string compatibilitySwitchName, bool onlyDB);
}
}
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