| Commit message (Collapse) | Author | Age | Files | Lines |
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I was partway done implementing a UI for users to approve untrusted
certs with, but let's just make them configure their servers right
instead.
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So that you can repeat the action on the next message if appropriate
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This commit introduces a new Aerc.Tick function that should be called to
refresh the internal state. This in turn makes each AccountView process worker
events.
The UI goroutine repeatedly refreshes the internal state before drawing a new
frame. The reason for this is that many worker messages may need to be
processed for a single frame, and drawing the UI is far slower than refreshing
the internal state. This has been confirmed in my testing (calling Aerc.Tick
only once per frame results in a slower display).
Many synchronization code has been removed. We can now write widgets without
having to care so much about races. The remaining sync users are:
- widgets/spinner: the spinner value is updated from inside an internal
goroutine
- lib/ui/invalidatable: Invalidate may be called from any goroutine
- lib/ui/grid: same
- lib/ui/ui: an internal goroutine needs read access to UI.exit
- worker/types/worker: Worker.callbacks is used for both worker and UI
callbacks
The exact goroutine requirements for Drawable have been documented.
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Terminal.damage is accessed when drawing and when invalidating the widget. For
this reason we need to protect it with a mutex.
This seems to fix various damage issues I've been experiencing (where some
regions of the terminal weren't correctly repainted).
Race detector trace:
Read at 0x00c0000c6670 by main goroutine:
git.sr.ht/~sircmpwn/aerc/widgets.(*Terminal).Draw()
/home/simon/src/aerc/widgets/terminal.go:292 +0x191
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/widgets.(*MessageViewer).Draw()
/home/simon/src/aerc/widgets/msgviewer.go:231 +0x253
git.sr.ht/~sircmpwn/aerc/lib/ui.(*TabContent).Draw()
/home/simon/src/aerc/lib/ui/tab.go:124 +0x12e
git.sr.ht/~sircmpwn/aerc/lib/ui.(*Grid).Draw()
/home/simon/src/aerc/lib/ui/grid.go:117 +0x575
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Draw()
/home/simon/src/aerc/widgets/aerc.go:95 +0x5a
git.sr.ht/~sircmpwn/aerc/lib/ui.(*UI).Tick()
/home/simon/src/aerc/lib/ui/ui.go:93 +0x1dd
main.main()
/home/simon/src/aerc/aerc.go:105 +0x539
Previous write at 0x00c0000c6670 by goroutine 37:
git.sr.ht/~sircmpwn/aerc/widgets.(*Terminal).onDamage-fm()
/home/simon/src/aerc/widgets/terminal.go:429 +0x131
git.sr.ht/~sircmpwn/go-libvterm._go_handle_damage()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:481 +0xf9
git.sr.ht/~sircmpwn/go-libvterm._cgoexpwrap_5e22200b58b7__go_handle_damage()
_cgo_gotypes.go:731 +0x58
runtime.call32()
/usr/lib/go/src/runtime/asm_amd64.s:519 +0x3a
git.sr.ht/~sircmpwn/go-libvterm.(*VTerm).Write.func1()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:329 +0x9d
git.sr.ht/~sircmpwn/go-libvterm.(*VTerm).Write()
/home/simon/go/pkg/mod/git.sr.ht/~sircmpwn/go-libvterm@v0.0.0-20190421201021-3184f6f13687/vterm.go:329 +0x7f
git.sr.ht/~sircmpwn/aerc/widgets.NewTerminal.func1()
/home/simon/src/aerc/widgets/terminal.go:131 +0x18c
Goroutine 37 (running) created at:
git.sr.ht/~sircmpwn/aerc/widgets.NewTerminal()
/home/simon/src/aerc/widgets/terminal.go:121 +0x23f
git.sr.ht/~sircmpwn/aerc/widgets.NewMessageViewer()
/home/simon/src/aerc/widgets/msgviewer.go:147 +0xfbe
git.sr.ht/~sircmpwn/aerc/commands/account.ViewMessage()
/home/simon/src/aerc/commands/account/view-message.go:26 +0x4a4
git.sr.ht/~sircmpwn/aerc/commands.(*Commands).ExecuteCommand()
/home/simon/src/aerc/commands/commands.go:47 +0x1f0
main.main.func1()
/home/simon/src/aerc/aerc.go:76 +0x205
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).BeginExCommand.func1()
/home/simon/src/aerc/widgets/aerc.go:262 +0x89
git.sr.ht/~sircmpwn/aerc/widgets.(*ExLine).Event()
/home/simon/src/aerc/widgets/exline.go:47 +0x222
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Event()
/home/simon/src/aerc/widgets/aerc.go:133 +0x83c
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).simulate()
/home/simon/src/aerc/widgets/aerc.go:126 +0x12a
git.sr.ht/~sircmpwn/aerc/widgets.(*Aerc).Event()
/home/simon/src/aerc/widgets/aerc.go:148 +0x766
git.sr.ht/~sircmpwn/aerc/lib/ui.(*UI).Tick()
/home/simon/src/aerc/lib/ui/ui.go:86 +0x11b
main.main()
/home/simon/src/aerc/aerc.go:105 +0x539
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Will probably end up doing this differently anyway
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Also removes some options that aren't going to be supported any time
soon.
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Or rather, to a user-specified folder
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Also moves truncation to the tab widget
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MessageStore has a lot of exported fields that can be read from the outside.
Each read must be protected, because a call from Update could happen at any
time.
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This field could be written to in the middle of a Draw call, which reads it
multiple times. Use an atomic variable instead.
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Many Drawable implementations have their own Invalidate and OnInvalidate
functions, with an unexported onInvalidate field. However OnInvalidate and
Invalidate are usually not called in the same goroutine. This results in a race
on this field, e.g.:
Read at 0x00c000094748 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList.func1()
/home/simon/src/aerc2/widgets/dirlist.go:85 +0x56
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:93 +0x1bb
Previous write at 0x00c000094748 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:46 +0x8f
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x286
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:50 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x800
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
To fix this, introduce a new type, Invalidatable, which protects the field.
Unfortunately the Drawable must be passed to the callback function in
Invalidate, so we still need to re-implement this in each Invalidatable user.
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It's accessed by the goroutine which increments it and the goroutine that draws
the widget at the same time. Use atomic instead.
Write at 0x00c00000ebc0 by goroutine 7:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1()
/home/simon/src/aerc2/widgets/spinner.go:50 +0x169
Previous read at 0x00c00000ebc0 by main goroutine:
[failed to restore the stack]
Goroutine 7 (running) created at:
git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start()
/home/simon/src/aerc2/widgets/spinner.go:44 +0x8b
git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList()
/home/simon/src/aerc2/widgets/dirlist.go:37 +0x286
git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView()
/home/simon/src/aerc2/widgets/account.go:50 +0x5ca
git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc()
/home/simon/src/aerc2/widgets/aerc.go:60 +0x800
main.main()
/home/simon/src/aerc2/aerc.go:65 +0x33e
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This also fixes segfault on :view-message on empty directory
Signed-off-by: Tom Lebreux <tomlebreux@cock.li>
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