Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CompMod / System / Collections / Generic / ThrowHelper.cs / 1305376 / ThrowHelper.cs
namespace System {
// This file defines an internal class used to throw exceptions in BCL code.
// The main purpose is to reduce code size.
//
// The old way to throw an exception generates quite a lot IL code and assembly code.
// Following is an example:
// C# source
// throw new ArgumentNullException("key", SR.GetString("ArgumentNull_Key"));
// IL code:
// IL_0003: ldstr "key"
// IL_0008: ldstr "ArgumentNull_Key"
// IL_000d: call string System.Environment::GetResourceString(string)
// IL_0012: newobj instance void System.ArgumentNullException::.ctor(string,string)
// IL_0017: throw
// which is 21bytes in IL.
//
// So we want to get rid of the ldstr and call to Environment.GetResource in IL.
// In order to do that, I created two enums: ExceptionResource, ExceptionArgument to represent the
// argument name and resource name in a small integer. The source code will be changed to
// ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key, ExceptionResource.ArgumentNull_Key);
//
// The IL code will be 7 bytes.
// IL_0008: ldc.i4.4
// IL_0009: ldc.i4.4
// IL_000a: call void System.ThrowHelper::ThrowArgumentNullException(valuetype System.ExceptionArgument)
// IL_000f: ldarg.0
//
// This will also reduce the Jitted code size a lot.
//
// It is very important we do this for generic classes because we can easily generate the same code
// multiple times for different instantiation.
//
//
// Jit will generates the code to throw exception at the end of a method, thus we can reduce working
// set if the user code will never throw an exception. However Jit doesn't know anything about the
// methods in ThrowHelper, so it will not moves the instructions to the end.
// This is not a problem for ngened code because we will probably move the code based on profile data(hopefully.)
//
// For jitted code, it doesn't make much difference. The only advantage of moving the code to the end is to
// improve cache locality. Patrick pointed out this doesn't make much different on newer processor like P4.
//
#if !SILVERLIGHT
using System.Runtime.Serialization;
#endif
using System.Diagnostics;
internal static class ThrowHelper {
internal static void ThrowWrongKeyTypeArgumentException(object key, Type targetType) {
throw new ArgumentException(SR.GetString(SR.Arg_WrongType, key, targetType), "key");
}
internal static void ThrowWrongValueTypeArgumentException(object value, Type targetType) {
throw new ArgumentException(SR.GetString(SR.Arg_WrongType, value, targetType), "value");
}
internal static void ThrowKeyNotFoundException() {
throw new System.Collections.Generic.KeyNotFoundException();
}
internal static void ThrowArgumentException(ExceptionResource resource) {
throw new ArgumentException(SR.GetString(GetResourceName(resource)));
}
internal static void ThrowArgumentNullException(ExceptionArgument argument) {
throw new ArgumentNullException(GetArgumentName(argument));
}
internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument) {
throw new ArgumentOutOfRangeException(GetArgumentName(argument));
}
internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) {
throw new ArgumentOutOfRangeException(GetArgumentName(argument), SR.GetString(GetResourceName(resource)));
}
internal static void ThrowInvalidOperationException(ExceptionResource resource) {
throw new InvalidOperationException(SR.GetString(GetResourceName(resource)));
}
#if !SILVERLIGHT
internal static void ThrowSerializationException(ExceptionResource resource) {
throw new SerializationException(SR.GetString(GetResourceName(resource)));
}
#endif
internal static void ThrowNotSupportedException(ExceptionResource resource) {
throw new NotSupportedException(SR.GetString(GetResourceName(resource)));
}
// Allow nulls for reference types and Nullable, but not for value types.
internal static void IfNullAndNullsAreIllegalThenThrow(object value, ExceptionArgument argName) {
// Note that default(T) is not equal to null for value types except when T is Nullable.
if (value == null && !(default(T) == null))
ThrowHelper.ThrowArgumentNullException(argName);
}
//
// This function will convert an ExceptionArgument enum value to the argument name string.
//
internal static string GetArgumentName(ExceptionArgument argument) {
string argumentName = null;
switch (argument) {
case ExceptionArgument.array:
argumentName = "array";
break;
case ExceptionArgument.arrayIndex:
argumentName = "arrayIndex";
break;
case ExceptionArgument.capacity:
argumentName = "capacity";
break;
case ExceptionArgument.collection:
argumentName = "collection";
break;
case ExceptionArgument.converter:
argumentName = "converter";
break;
case ExceptionArgument.count:
argumentName = "count";
break;
case ExceptionArgument.dictionary:
argumentName = "dictionary";
break;
case ExceptionArgument.index:
argumentName = "index";
break;
case ExceptionArgument.info:
argumentName = "info";
break;
case ExceptionArgument.key:
argumentName = "key";
break;
case ExceptionArgument.match:
argumentName = "match";
break;
case ExceptionArgument.obj:
argumentName = "obj";
break;
case ExceptionArgument.queue:
argumentName = "queue";
break;
case ExceptionArgument.stack:
argumentName = "stack";
break;
case ExceptionArgument.startIndex:
argumentName = "startIndex";
break;
case ExceptionArgument.value:
argumentName = "value";
break;
case ExceptionArgument.item:
argumentName = "item";
break;
default:
Debug.Assert(false, "The enum value is not defined, please checked ExceptionArgumentName Enum.");
return string.Empty;
}
return argumentName;
}
//
// This function will convert an ExceptionResource enum value to the resource string.
//
internal static string GetResourceName(ExceptionResource resource) {
string resourceName = null;
switch (resource) {
case ExceptionResource.Argument_ImplementIComparable:
resourceName = SR.Argument_ImplementIComparable;
break;
case ExceptionResource.Argument_AddingDuplicate:
resourceName = SR.Argument_AddingDuplicate;
break;
case ExceptionResource.ArgumentOutOfRange_Index:
resourceName = SR.ArgumentOutOfRange_Index;
break;
case ExceptionResource.ArgumentOutOfRange_NeedNonNegNum:
resourceName = SR.ArgumentOutOfRange_NeedNonNegNum;
break;
case ExceptionResource.ArgumentOutOfRange_NeedNonNegNumRequired:
resourceName = SR.ArgumentOutOfRange_NeedNonNegNumRequired;
break;
case ExceptionResource.ArgumentOutOfRange_SmallCapacity:
resourceName = SR.ArgumentOutOfRange_SmallCapacity;
break;
case ExceptionResource.Arg_ArrayPlusOffTooSmall:
resourceName = SR.Arg_ArrayPlusOffTooSmall;
break;
case ExceptionResource.Arg_RankMultiDimNotSupported:
resourceName = SR.Arg_MultiRank;
break;
case ExceptionResource.Arg_NonZeroLowerBound:
resourceName = SR.Arg_NonZeroLowerBound;
break;
case ExceptionResource.Argument_InvalidArrayType:
resourceName = SR.Invalid_Array_Type;
break;
case ExceptionResource.Argument_InvalidOffLen:
resourceName = SR.Argument_InvalidOffLen;
break;
case ExceptionResource.InvalidOperation_CannotRemoveFromStackOrQueue:
resourceName = SR.InvalidOperation_CannotRemoveFromStackOrQueue;
break;
case ExceptionResource.InvalidOperation_EmptyCollection:
resourceName = SR.InvalidOperation_EmptyCollection;
break;
case ExceptionResource.InvalidOperation_EmptyQueue:
resourceName = SR.InvalidOperation_EmptyQueue;
break;
case ExceptionResource.InvalidOperation_EnumOpCantHappen:
resourceName = SR.InvalidOperation_EnumOpCantHappen;
break;
case ExceptionResource.InvalidOperation_EnumFailedVersion:
resourceName = SR.InvalidOperation_EnumFailedVersion;
break;
case ExceptionResource.InvalidOperation_EmptyStack:
resourceName = SR.InvalidOperation_EmptyStack;
break;
case ExceptionResource.InvalidOperation_EnumNotStarted:
resourceName = SR.InvalidOperation_EnumNotStarted;
break;
case ExceptionResource.InvalidOperation_EnumEnded:
resourceName = SR.InvalidOperation_EnumEnded;
break;
case ExceptionResource.NotSupported_KeyCollectionSet:
resourceName = SR.NotSupported_KeyCollectionSet;
break;
case ExceptionResource.NotSupported_SortedListNestedWrite:
resourceName = SR.NotSupported_SortedListNestedWrite;
break;
#if !SILVERLIGHT
case ExceptionResource.Serialization_InvalidOnDeser:
resourceName = SR.Serialization_InvalidOnDeser;
break;
case ExceptionResource.Serialization_MissingValues:
resourceName = SR.Serialization_MissingValues;
break;
case ExceptionResource.Serialization_MismatchedCount:
resourceName = SR.Serialization_MismatchedCount;
break;
#endif
case ExceptionResource.NotSupported_ValueCollectionSet:
resourceName = SR.NotSupported_ValueCollectionSet;
break;
default:
Debug.Assert(false, "The enum value is not defined, please checked ExceptionArgumentName Enum.");
return string.Empty;
}
return resourceName;
}
}
//
// The convention for this enum is using the argument name as the enum name
//
internal enum ExceptionArgument {
obj,
dictionary,
array,
info,
key,
collection,
match,
converter,
queue,
stack,
capacity,
index,
startIndex,
value,
count,
arrayIndex,
item,
}
//
// The convention for this enum is using the resource name as the enum name
//
internal enum ExceptionResource {
Argument_ImplementIComparable,
ArgumentOutOfRange_NeedNonNegNum,
ArgumentOutOfRange_NeedNonNegNumRequired,
Arg_ArrayPlusOffTooSmall,
Argument_AddingDuplicate,
Serialization_InvalidOnDeser,
Serialization_MismatchedCount,
Serialization_MissingValues,
Arg_RankMultiDimNotSupported,
Arg_NonZeroLowerBound,
Argument_InvalidArrayType,
NotSupported_KeyCollectionSet,
ArgumentOutOfRange_SmallCapacity,
ArgumentOutOfRange_Index,
Argument_InvalidOffLen,
NotSupported_ReadOnlyCollection,
InvalidOperation_CannotRemoveFromStackOrQueue,
InvalidOperation_EmptyCollection,
InvalidOperation_EmptyQueue,
InvalidOperation_EnumOpCantHappen,
InvalidOperation_EnumFailedVersion,
InvalidOperation_EmptyStack,
InvalidOperation_EnumNotStarted,
InvalidOperation_EnumEnded,
NotSupported_SortedListNestedWrite,
NotSupported_ValueCollectionSet,
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
namespace System {
// This file defines an internal class used to throw exceptions in BCL code.
// The main purpose is to reduce code size.
//
// The old way to throw an exception generates quite a lot IL code and assembly code.
// Following is an example:
// C# source
// throw new ArgumentNullException("key", SR.GetString("ArgumentNull_Key"));
// IL code:
// IL_0003: ldstr "key"
// IL_0008: ldstr "ArgumentNull_Key"
// IL_000d: call string System.Environment::GetResourceString(string)
// IL_0012: newobj instance void System.ArgumentNullException::.ctor(string,string)
// IL_0017: throw
// which is 21bytes in IL.
//
// So we want to get rid of the ldstr and call to Environment.GetResource in IL.
// In order to do that, I created two enums: ExceptionResource, ExceptionArgument to represent the
// argument name and resource name in a small integer. The source code will be changed to
// ThrowHelper.ThrowArgumentNullException(ExceptionArgument.key, ExceptionResource.ArgumentNull_Key);
//
// The IL code will be 7 bytes.
// IL_0008: ldc.i4.4
// IL_0009: ldc.i4.4
// IL_000a: call void System.ThrowHelper::ThrowArgumentNullException(valuetype System.ExceptionArgument)
// IL_000f: ldarg.0
//
// This will also reduce the Jitted code size a lot.
//
// It is very important we do this for generic classes because we can easily generate the same code
// multiple times for different instantiation.
//
//
// Jit will generates the code to throw exception at the end of a method, thus we can reduce working
// set if the user code will never throw an exception. However Jit doesn't know anything about the
// methods in ThrowHelper, so it will not moves the instructions to the end.
// This is not a problem for ngened code because we will probably move the code based on profile data(hopefully.)
//
// For jitted code, it doesn't make much difference. The only advantage of moving the code to the end is to
// improve cache locality. Patrick pointed out this doesn't make much different on newer processor like P4.
//
#if !SILVERLIGHT
using System.Runtime.Serialization;
#endif
using System.Diagnostics;
internal static class ThrowHelper {
internal static void ThrowWrongKeyTypeArgumentException(object key, Type targetType) {
throw new ArgumentException(SR.GetString(SR.Arg_WrongType, key, targetType), "key");
}
internal static void ThrowWrongValueTypeArgumentException(object value, Type targetType) {
throw new ArgumentException(SR.GetString(SR.Arg_WrongType, value, targetType), "value");
}
internal static void ThrowKeyNotFoundException() {
throw new System.Collections.Generic.KeyNotFoundException();
}
internal static void ThrowArgumentException(ExceptionResource resource) {
throw new ArgumentException(SR.GetString(GetResourceName(resource)));
}
internal static void ThrowArgumentNullException(ExceptionArgument argument) {
throw new ArgumentNullException(GetArgumentName(argument));
}
internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument) {
throw new ArgumentOutOfRangeException(GetArgumentName(argument));
}
internal static void ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource) {
throw new ArgumentOutOfRangeException(GetArgumentName(argument), SR.GetString(GetResourceName(resource)));
}
internal static void ThrowInvalidOperationException(ExceptionResource resource) {
throw new InvalidOperationException(SR.GetString(GetResourceName(resource)));
}
#if !SILVERLIGHT
internal static void ThrowSerializationException(ExceptionResource resource) {
throw new SerializationException(SR.GetString(GetResourceName(resource)));
}
#endif
internal static void ThrowNotSupportedException(ExceptionResource resource) {
throw new NotSupportedException(SR.GetString(GetResourceName(resource)));
}
// Allow nulls for reference types and Nullable, but not for value types.
internal static void IfNullAndNullsAreIllegalThenThrow(object value, ExceptionArgument argName) {
// Note that default(T) is not equal to null for value types except when T is Nullable.
if (value == null && !(default(T) == null))
ThrowHelper.ThrowArgumentNullException(argName);
}
//
// This function will convert an ExceptionArgument enum value to the argument name string.
//
internal static string GetArgumentName(ExceptionArgument argument) {
string argumentName = null;
switch (argument) {
case ExceptionArgument.array:
argumentName = "array";
break;
case ExceptionArgument.arrayIndex:
argumentName = "arrayIndex";
break;
case ExceptionArgument.capacity:
argumentName = "capacity";
break;
case ExceptionArgument.collection:
argumentName = "collection";
break;
case ExceptionArgument.converter:
argumentName = "converter";
break;
case ExceptionArgument.count:
argumentName = "count";
break;
case ExceptionArgument.dictionary:
argumentName = "dictionary";
break;
case ExceptionArgument.index:
argumentName = "index";
break;
case ExceptionArgument.info:
argumentName = "info";
break;
case ExceptionArgument.key:
argumentName = "key";
break;
case ExceptionArgument.match:
argumentName = "match";
break;
case ExceptionArgument.obj:
argumentName = "obj";
break;
case ExceptionArgument.queue:
argumentName = "queue";
break;
case ExceptionArgument.stack:
argumentName = "stack";
break;
case ExceptionArgument.startIndex:
argumentName = "startIndex";
break;
case ExceptionArgument.value:
argumentName = "value";
break;
case ExceptionArgument.item:
argumentName = "item";
break;
default:
Debug.Assert(false, "The enum value is not defined, please checked ExceptionArgumentName Enum.");
return string.Empty;
}
return argumentName;
}
//
// This function will convert an ExceptionResource enum value to the resource string.
//
internal static string GetResourceName(ExceptionResource resource) {
string resourceName = null;
switch (resource) {
case ExceptionResource.Argument_ImplementIComparable:
resourceName = SR.Argument_ImplementIComparable;
break;
case ExceptionResource.Argument_AddingDuplicate:
resourceName = SR.Argument_AddingDuplicate;
break;
case ExceptionResource.ArgumentOutOfRange_Index:
resourceName = SR.ArgumentOutOfRange_Index;
break;
case ExceptionResource.ArgumentOutOfRange_NeedNonNegNum:
resourceName = SR.ArgumentOutOfRange_NeedNonNegNum;
break;
case ExceptionResource.ArgumentOutOfRange_NeedNonNegNumRequired:
resourceName = SR.ArgumentOutOfRange_NeedNonNegNumRequired;
break;
case ExceptionResource.ArgumentOutOfRange_SmallCapacity:
resourceName = SR.ArgumentOutOfRange_SmallCapacity;
break;
case ExceptionResource.Arg_ArrayPlusOffTooSmall:
resourceName = SR.Arg_ArrayPlusOffTooSmall;
break;
case ExceptionResource.Arg_RankMultiDimNotSupported:
resourceName = SR.Arg_MultiRank;
break;
case ExceptionResource.Arg_NonZeroLowerBound:
resourceName = SR.Arg_NonZeroLowerBound;
break;
case ExceptionResource.Argument_InvalidArrayType:
resourceName = SR.Invalid_Array_Type;
break;
case ExceptionResource.Argument_InvalidOffLen:
resourceName = SR.Argument_InvalidOffLen;
break;
case ExceptionResource.InvalidOperation_CannotRemoveFromStackOrQueue:
resourceName = SR.InvalidOperation_CannotRemoveFromStackOrQueue;
break;
case ExceptionResource.InvalidOperation_EmptyCollection:
resourceName = SR.InvalidOperation_EmptyCollection;
break;
case ExceptionResource.InvalidOperation_EmptyQueue:
resourceName = SR.InvalidOperation_EmptyQueue;
break;
case ExceptionResource.InvalidOperation_EnumOpCantHappen:
resourceName = SR.InvalidOperation_EnumOpCantHappen;
break;
case ExceptionResource.InvalidOperation_EnumFailedVersion:
resourceName = SR.InvalidOperation_EnumFailedVersion;
break;
case ExceptionResource.InvalidOperation_EmptyStack:
resourceName = SR.InvalidOperation_EmptyStack;
break;
case ExceptionResource.InvalidOperation_EnumNotStarted:
resourceName = SR.InvalidOperation_EnumNotStarted;
break;
case ExceptionResource.InvalidOperation_EnumEnded:
resourceName = SR.InvalidOperation_EnumEnded;
break;
case ExceptionResource.NotSupported_KeyCollectionSet:
resourceName = SR.NotSupported_KeyCollectionSet;
break;
case ExceptionResource.NotSupported_SortedListNestedWrite:
resourceName = SR.NotSupported_SortedListNestedWrite;
break;
#if !SILVERLIGHT
case ExceptionResource.Serialization_InvalidOnDeser:
resourceName = SR.Serialization_InvalidOnDeser;
break;
case ExceptionResource.Serialization_MissingValues:
resourceName = SR.Serialization_MissingValues;
break;
case ExceptionResource.Serialization_MismatchedCount:
resourceName = SR.Serialization_MismatchedCount;
break;
#endif
case ExceptionResource.NotSupported_ValueCollectionSet:
resourceName = SR.NotSupported_ValueCollectionSet;
break;
default:
Debug.Assert(false, "The enum value is not defined, please checked ExceptionArgumentName Enum.");
return string.Empty;
}
return resourceName;
}
}
//
// The convention for this enum is using the argument name as the enum name
//
internal enum ExceptionArgument {
obj,
dictionary,
array,
info,
key,
collection,
match,
converter,
queue,
stack,
capacity,
index,
startIndex,
value,
count,
arrayIndex,
item,
}
//
// The convention for this enum is using the resource name as the enum name
//
internal enum ExceptionResource {
Argument_ImplementIComparable,
ArgumentOutOfRange_NeedNonNegNum,
ArgumentOutOfRange_NeedNonNegNumRequired,
Arg_ArrayPlusOffTooSmall,
Argument_AddingDuplicate,
Serialization_InvalidOnDeser,
Serialization_MismatchedCount,
Serialization_MissingValues,
Arg_RankMultiDimNotSupported,
Arg_NonZeroLowerBound,
Argument_InvalidArrayType,
NotSupported_KeyCollectionSet,
ArgumentOutOfRange_SmallCapacity,
ArgumentOutOfRange_Index,
Argument_InvalidOffLen,
NotSupported_ReadOnlyCollection,
InvalidOperation_CannotRemoveFromStackOrQueue,
InvalidOperation_EmptyCollection,
InvalidOperation_EmptyQueue,
InvalidOperation_EnumOpCantHappen,
InvalidOperation_EnumFailedVersion,
InvalidOperation_EmptyStack,
InvalidOperation_EnumNotStarted,
InvalidOperation_EnumEnded,
NotSupported_SortedListNestedWrite,
NotSupported_ValueCollectionSet,
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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