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closes #4983
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It serves no purpose because process_stop() is already guarded by
`proc->stopped_time`.
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ref #7649
ref #7664
27f9b1c7b029d8 caused a regression: it uses loop_schedule_deferred() to
defer emitting the "enable focus reporting" termcode. tui_main() never
processes `tui_loop.events` (which loop_schedule_deferred() depends on),
so the event was never actually processed.
But fixing that (by processing `tui_loop.events`) would bring back the
problem 27f9b1c7b029 tried to fix: it still emits the event too soon.
Instead, do a little dance: schedule the event on `main_loop` and then
forward it to `tui_loop`.
NOTE: after this commit, in tmux 2.3 with `focus-events` enabled,
FocusGained is fired on startup and when resuming from suspend.
Using `script` to record the terminal session (and `vterm-dump` to
post-process the result):
BEFORE:
{DECSM 1049}{DECSM 1}{ESC =}
{CUP *}{ED *}{DECSM 2004}{DECSM 1004}{CSI 1,43 r}
{CUP 1,1}
{CUP *}{ED *}{SM 34}{DECSM 25}
{DECRM 25}{CSI 2 q}{CSI 2 q}
{CUP *}{ED *}{LF}
{SGR *}{LS1}{SGR 94}~
...
AFTER:
{CUP *}{ED *}{CSI 1,43 r}
{CUP 1,1}
{CUP *}{ED *}{SM 34}{DECSM 25}
{DECRM 25}{CSI 2 q}{CSI 2 q}
{CUP *}{ED *}{DECSM 2004}{DECSM 1004}{LF}
{SGR *}{LS1}{SGR 94}~
...
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`lib/queue.h` implements a basic queue. `event/queue.c` implements
a specialized data structure on top of lib/queue.h; it is not a "normal"
queue.
Rename the specialized multi-level queue implemented in event/queue.c to
"multiqueue", to avoid confusion when reading the code.
Before this change one can eventually notice that "macros (uppercase
symbols) are for the normal queue, lowercase operations are for the
multi-level queue", but that is unnecessary friction for new developers
(or existing developers just visiting this part of the codebase).
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- Implement `loop_schedule` method for queueing events from other threads
- Make `loop_poll_events` `recursive` static variable a field of the Loop
structure
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- Improve the implementation of deferred/immediate events.
- Use the new queue module to change how/when events are queued/processed by
giving a private queue to each emitter.
- Immediate events(which only exist to break uv_run recursion) are now
represented in the `loop->fast_events` queue.
- Events pushed to child queues are propagated to the event loop main queue and
processed as K_EVENT keys.
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- Declare poll timer in Loop structure instead of a loop_poll_events local
variable.
- Move deferred event management to input.c
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- New libuv/pty process abstraction with simplified API and no globals.
- Remove nvim/os/job*. Jobs are now a concept that apply only to programs
spawned by vimscript job* functions.
- Refactor shell.c/channel.c to use the new module, which brings a number of
advantages:
- Simplified API, less code
- No slots in the user job table are used
- Not possible to acidentally receive data from vimscript
- Implement job table in eval.c, which is now a hash table with unilimited job
slots and unique job ids.
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- Add event loop abstraction module under src/nvim/event. The
src/nvim/event/loop module replaces src/nvim/os/event
- Remove direct dependency on libuv signal/timer API and use the new abstraction
instead.
- Replace all references to uv_default_loop() by &loop.uv, a new global variable
that wraps libuv main event loop but allows the event loop functions to be
reused in other contexts.
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