c213fd1fd8
There is no need to depend on the old context package now that the minimum Go version is 1.7. The move to "context" eliminates our weird vendoring setup. Some vendored code still uses golang.org/x/net/context and it is now vendored in the normal way. This change triggered new vet checks around context.WithTimeout which didn't fire with golang.org/x/net/context.
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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