597e418cb0
The main motivation of this commit is to add a `page.Page` interface to replace the very file-oriented `hugolib.Page` struct. This is all a preparation step for issue #5074, "pages from other data sources". But this also fixes a set of annoying limitations, especially related to custom output formats, and shortcodes. Most notable changes: * The inner content of shortcodes using the `{{%` as the outer-most delimiter will now be sent to the content renderer, e.g. Blackfriday. This means that any markdown will partake in the global ToC and footnote context etc. * The Custom Output formats are now "fully virtualized". This removes many of the current limitations. * The taxonomy list type now has a reference to the `Page` object. This improves the taxonomy template `.Title` situation and make common template constructs much simpler. See #5074 Fixes #5763 Fixes #5758 Fixes #5090 Fixes #5204 Fixes #4695 Fixes #5607 Fixes #5707 Fixes #5719 Fixes #3113 Fixes #5706 Fixes #5767 Fixes #5723 Fixes #5769 Fixes #5770 Fixes #5771 Fixes #5759 Fixes #5776 Fixes #5777 Fixes #5778
70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
// Copyright 2019 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package lazy
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import (
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"sync"
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"sync/atomic"
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)
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// onceMore is similar to sync.Once.
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//
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// Additional features are:
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// * it can be reset, so the action can be repeated if needed
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// * it has methods to check if it's done or in progress
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//
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type onceMore struct {
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mu sync.Mutex
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lock uint32
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done uint32
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}
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func (t *onceMore) Do(f func()) {
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if atomic.LoadUint32(&t.done) == 1 {
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return
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}
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// f may call this Do and we would get a deadlock.
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locked := atomic.CompareAndSwapUint32(&t.lock, 0, 1)
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if !locked {
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return
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}
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defer atomic.StoreUint32(&t.lock, 0)
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t.mu.Lock()
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defer t.mu.Unlock()
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// Double check
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if t.done == 1 {
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return
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}
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defer atomic.StoreUint32(&t.done, 1)
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f()
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}
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func (t *onceMore) InProgress() bool {
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return atomic.LoadUint32(&t.lock) == 1
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}
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func (t *onceMore) Done() bool {
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return atomic.LoadUint32(&t.done) == 1
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}
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func (t *onceMore) ResetWithLock() *sync.Mutex {
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t.mu.Lock()
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defer atomic.StoreUint32(&t.done, 0)
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return &t.mu
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}
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