-
Notifications
You must be signed in to change notification settings - Fork 44
/
quotapool.go
60 lines (52 loc) · 1.77 KB
/
quotapool.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
// Copyright 2019 The CortexTheseus Authors
// This file is part of the CortexFoundation library.
//
// The CortexFoundation library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The CortexFoundation library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the CortexFoundation library. If not, see <http://www.gnu.org/licenses/>.
package core
import (
"fmt"
"math"
)
// QuotaPool tracks the amount of gas available during execution of the transactions
// in a block. The zero value is a pool with zero gas available.
type QuotaPool uint64
// AddGas makes gas available for execution.
func (qp *QuotaPool) AddQuota(amount uint64) *QuotaPool {
if uint64(*qp) > math.MaxUint64-amount {
panic("quota pool pushed above uint64")
}
*(*uint64)(qp) += amount
return qp
}
// SubGas deducts the given amount from the pool if enough gas is
// available and returns an error otherwise.
func (qp *QuotaPool) SubQuota(amount uint64) error {
if uint64(*qp) < amount {
return ErrQuotaLimitReached
}
*(*uint64)(qp) -= amount
return nil
}
// Gas returns the amount of gas remaining in the pool.
func (qp *QuotaPool) Quota() uint64 {
return uint64(*qp)
}
func (qp *QuotaPool) String() string {
return fmt.Sprintf("%d", *qp)
}
func NewQuotaPool(x uint64) *QuotaPool {
var qp = new(QuotaPool)
*(*uint64)(qp) = x
return qp
}