mirror of https://github.com/k3d-io/k3d
parent
28ff88a1ed
commit
8da0f7d7dc
@ -0,0 +1,3 @@ |
|||||||
|
# This source code refers to The Go Authors for copyright purposes. |
||||||
|
# The master list of authors is in the main Go distribution, |
||||||
|
# visible at http://tip.golang.org/AUTHORS. |
@ -0,0 +1,3 @@ |
|||||||
|
# This source code was written by the Go contributors. |
||||||
|
# The master list of contributors is in the main Go distribution, |
||||||
|
# visible at http://tip.golang.org/CONTRIBUTORS. |
@ -0,0 +1,27 @@ |
|||||||
|
Copyright (c) 2009 The Go Authors. All rights reserved. |
||||||
|
|
||||||
|
Redistribution and use in source and binary forms, with or without |
||||||
|
modification, are permitted provided that the following conditions are |
||||||
|
met: |
||||||
|
|
||||||
|
* Redistributions of source code must retain the above copyright |
||||||
|
notice, this list of conditions and the following disclaimer. |
||||||
|
* Redistributions in binary form must reproduce the above |
||||||
|
copyright notice, this list of conditions and the following disclaimer |
||||||
|
in the documentation and/or other materials provided with the |
||||||
|
distribution. |
||||||
|
* Neither the name of Google Inc. nor the names of its |
||||||
|
contributors may be used to endorse or promote products derived from |
||||||
|
this software without specific prior written permission. |
||||||
|
|
||||||
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||||
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||||
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||||
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||||
|
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||||
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||||
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||||
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||||
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||||
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||||
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
@ -0,0 +1,22 @@ |
|||||||
|
Additional IP Rights Grant (Patents) |
||||||
|
|
||||||
|
"This implementation" means the copyrightable works distributed by |
||||||
|
Google as part of the Go project. |
||||||
|
|
||||||
|
Google hereby grants to You a perpetual, worldwide, non-exclusive, |
||||||
|
no-charge, royalty-free, irrevocable (except as stated in this section) |
||||||
|
patent license to make, have made, use, offer to sell, sell, import, |
||||||
|
transfer and otherwise run, modify and propagate the contents of this |
||||||
|
implementation of Go, where such license applies only to those patent |
||||||
|
claims, both currently owned or controlled by Google and acquired in |
||||||
|
the future, licensable by Google that are necessarily infringed by this |
||||||
|
implementation of Go. This grant does not include claims that would be |
||||||
|
infringed only as a consequence of further modification of this |
||||||
|
implementation. If you or your agent or exclusive licensee institute or |
||||||
|
order or agree to the institution of patent litigation against any |
||||||
|
entity (including a cross-claim or counterclaim in a lawsuit) alleging |
||||||
|
that this implementation of Go or any code incorporated within this |
||||||
|
implementation of Go constitutes direct or contributory patent |
||||||
|
infringement, or inducement of patent infringement, then any patent |
||||||
|
rights granted to you under this License for this implementation of Go |
||||||
|
shall terminate as of the date such litigation is filed. |
@ -0,0 +1,66 @@ |
|||||||
|
// Copyright 2016 The Go Authors. All rights reserved.
|
||||||
|
// Use of this source code is governed by a BSD-style
|
||||||
|
// license that can be found in the LICENSE file.
|
||||||
|
|
||||||
|
// Package errgroup provides synchronization, error propagation, and Context
|
||||||
|
// cancelation for groups of goroutines working on subtasks of a common task.
|
||||||
|
package errgroup |
||||||
|
|
||||||
|
import ( |
||||||
|
"context" |
||||||
|
"sync" |
||||||
|
) |
||||||
|
|
||||||
|
// A Group is a collection of goroutines working on subtasks that are part of
|
||||||
|
// the same overall task.
|
||||||
|
//
|
||||||
|
// A zero Group is valid and does not cancel on error.
|
||||||
|
type Group struct { |
||||||
|
cancel func() |
||||||
|
|
||||||
|
wg sync.WaitGroup |
||||||
|
|
||||||
|
errOnce sync.Once |
||||||
|
err error |
||||||
|
} |
||||||
|
|
||||||
|
// WithContext returns a new Group and an associated Context derived from ctx.
|
||||||
|
//
|
||||||
|
// The derived Context is canceled the first time a function passed to Go
|
||||||
|
// returns a non-nil error or the first time Wait returns, whichever occurs
|
||||||
|
// first.
|
||||||
|
func WithContext(ctx context.Context) (*Group, context.Context) { |
||||||
|
ctx, cancel := context.WithCancel(ctx) |
||||||
|
return &Group{cancel: cancel}, ctx |
||||||
|
} |
||||||
|
|
||||||
|
// Wait blocks until all function calls from the Go method have returned, then
|
||||||
|
// returns the first non-nil error (if any) from them.
|
||||||
|
func (g *Group) Wait() error { |
||||||
|
g.wg.Wait() |
||||||
|
if g.cancel != nil { |
||||||
|
g.cancel() |
||||||
|
} |
||||||
|
return g.err |
||||||
|
} |
||||||
|
|
||||||
|
// Go calls the given function in a new goroutine.
|
||||||
|
//
|
||||||
|
// The first call to return a non-nil error cancels the group; its error will be
|
||||||
|
// returned by Wait.
|
||||||
|
func (g *Group) Go(f func() error) { |
||||||
|
g.wg.Add(1) |
||||||
|
|
||||||
|
go func() { |
||||||
|
defer g.wg.Done() |
||||||
|
|
||||||
|
if err := f(); err != nil { |
||||||
|
g.errOnce.Do(func() { |
||||||
|
g.err = err |
||||||
|
if g.cancel != nil { |
||||||
|
g.cancel() |
||||||
|
} |
||||||
|
}) |
||||||
|
} |
||||||
|
}() |
||||||
|
} |
Loading…
Reference in new issue