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Make slab sizes and capacity for fixed size memory pool configurable
Signed-off-by: Christian Haudum <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,51 @@ | ||
| package mempool | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/c2h5oh/datasize" | ||
| ) | ||
|
|
||
| type Bucket struct { | ||
| Size, Capacity int | ||
| Size int | ||
| Capacity uint64 | ||
| } | ||
|
|
||
| func (b Bucket) Parse(s string) (any, error) { | ||
| parts := strings.Split(s, "x") | ||
| if len(parts) != 2 { | ||
| return nil, errors.New("bucket must be in format {count}x{bytes}") | ||
| } | ||
|
|
||
| size, err := strconv.Atoi(parts[0]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| capacity, err := datasize.ParseString(parts[1]) | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
|
|
||
| return Bucket{ | ||
| Size: size, | ||
| Capacity: uint64(capacity), | ||
| }, nil | ||
| } | ||
|
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| func (b Bucket) String() string { | ||
| return fmt.Sprintf("%dx%s", b.Size, datasize.ByteSize(b.Capacity).String()) | ||
| } | ||
|
|
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| type Buckets []Bucket | ||
|
|
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| func (b Buckets) String() string { | ||
| s := make([]string, 0, len(b)) | ||
| for i := range b { | ||
| s = append(s, b[i].String()) | ||
| } | ||
| return strings.Join(s, ",") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package flagext | ||
|
|
||
| import ( | ||
| "strings" | ||
| ) | ||
|
|
||
| type ListValue interface { | ||
| String() string | ||
| Parse(s string) (any, error) | ||
| } | ||
|
|
||
| // StringSliceCSV is a slice of strings that is parsed from a comma-separated string | ||
| // It implements flag.Value and yaml Marshalers | ||
| type CSV[T ListValue] []T | ||
|
|
||
| // String implements flag.Value | ||
| func (v CSV[T]) String() string { | ||
| s := make([]string, 0, len(v)) | ||
| for i := range v { | ||
| s = append(s, v[i].String()) | ||
| } | ||
| return strings.Join(s, ",") | ||
| } | ||
|
|
||
| // Set implements flag.Value | ||
| func (v *CSV[T]) Set(s string) error { | ||
| if len(s) == 0 { | ||
| *v = nil | ||
| return nil | ||
| } | ||
| var zero T | ||
| values := strings.Split(s, ",") | ||
| for _, val := range values { | ||
| el, err := zero.Parse(val) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| *v = append(*v, el.(T)) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // String implements flag.Getter | ||
| func (v CSV[T]) Get() []T { | ||
| return v | ||
| } | ||
|
|
||
| // UnmarshalYAML implements yaml.Unmarshaler. | ||
| func (v *CSV[T]) UnmarshalYAML(unmarshal func(interface{}) error) error { | ||
| var s string | ||
| if err := unmarshal(&s); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return v.Set(s) | ||
| } | ||
|
|
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| // MarshalYAML implements yaml.Marshaler. | ||
| func (v CSV[T]) MarshalYAML() (interface{}, error) { | ||
| return v.String(), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package flagext | ||
|
|
||
| import ( | ||
| "strconv" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| type customType int | ||
|
|
||
| // Parse implements ListValue. | ||
| func (l customType) Parse(s string) (any, error) { | ||
| v, err := strconv.Atoi(s) | ||
| if err != nil { | ||
| return customType(0), err | ||
| } | ||
| return customType(v), nil | ||
| } | ||
|
|
||
| // String implements ListValue. | ||
| func (l customType) String() string { | ||
| return strconv.Itoa(int(l)) | ||
| } | ||
|
|
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| var _ ListValue = customType(0) | ||
|
|
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| func Test_CSV(t *testing.T) { | ||
| for _, tc := range []struct { | ||
| in string | ||
| err bool | ||
| out []customType | ||
| }{ | ||
| { | ||
| in: "", | ||
| err: false, | ||
| out: nil, | ||
| }, | ||
| { | ||
| in: ",", | ||
| err: true, | ||
| out: []customType{}, | ||
| }, | ||
| { | ||
| in: "1", | ||
| err: false, | ||
| out: []customType{1}, | ||
| }, | ||
| { | ||
| in: "1,2", | ||
| err: false, | ||
| out: []customType{1, 2}, | ||
| }, | ||
| { | ||
| in: "1,", | ||
| err: true, | ||
| out: []customType{}, | ||
| }, | ||
| { | ||
| in: ",1", | ||
| err: true, | ||
| out: []customType{}, | ||
| }, | ||
| } { | ||
| t.Run(tc.in, func(t *testing.T) { | ||
| var v CSV[customType] | ||
|
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| err := v.Set(tc.in) | ||
| if tc.err { | ||
| require.NotNil(t, err) | ||
| } else { | ||
| require.Nil(t, err) | ||
| require.Equal(t, tc.out, v.Get()) | ||
| } | ||
|
|
||
| }) | ||
| } | ||
|
|
||
| } |