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da20785685
Former-commit-id: 23f542f43b4b493e38f5aa4c29788ed93a63b43b [formerly 71b23a6a28eb045fcfeab6329de69f1e5455486b] Former-commit-id: d12b3a6decc876f010a71f98e11df7387c1aaf2a
81 lines
2.8 KiB
Go
81 lines
2.8 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains all the wrappers from the golang.org/x/net/context package to support
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// client side context management on mobile platforms.
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package geth
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import (
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"context"
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"time"
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)
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// Context carries a deadline, a cancelation signal, and other values across API
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// boundaries.
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type Context struct {
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context context.Context
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cancel context.CancelFunc
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}
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// NewContext returns a non-nil, empty Context. It is never canceled, has no
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// values, and has no deadline. It is typically used by the main function,
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// initialization, and tests, and as the top-level Context for incoming requests.
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func NewContext() *Context {
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return &Context{
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context: context.Background(),
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}
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}
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// WithCancel returns a copy of the original context with cancellation mechanism
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// included.
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//
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// Canceling this context releases resources associated with it, so code should
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// call cancel as soon as the operations running in this Context complete.
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func (c *Context) WithCancel() *Context {
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child, cancel := context.WithCancel(c.context)
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return &Context{
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context: child,
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cancel: cancel,
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}
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}
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// WithDeadline returns a copy of the original context with the deadline adjusted
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// to be no later than the specified time.
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//
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// Canceling this context releases resources associated with it, so code should
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// call cancel as soon as the operations running in this Context complete.
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func (c *Context) WithDeadline(sec int64, nsec int64) *Context {
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child, cancel := context.WithDeadline(c.context, time.Unix(sec, nsec))
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return &Context{
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context: child,
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cancel: cancel,
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}
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}
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// WithTimeout returns a copy of the original context with the deadline adjusted
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// to be no later than now + the duration specified.
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//
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// Canceling this context releases resources associated with it, so code should
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// call cancel as soon as the operations running in this Context complete.
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func (c *Context) WithTimeout(nsec int64) *Context {
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child, cancel := context.WithTimeout(c.context, time.Duration(nsec))
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return &Context{
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context: child,
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cancel: cancel,
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}
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}
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