116 lines
1.8 KiB
Bash
116 lines
1.8 KiB
Bash
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#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# map[(scope_id,track,cleanup_id) -> cleanup_command]
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# track={d=default | p=priority}
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declare -A __DEFER__JOBS
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# map[(scope_id,track) -> # cleanup_commands]
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declare -A __DEFER__NJOBS
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# scope_id of the topmost scope.
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__DEFER__SCOPE_ID=0
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__defer__ndefer_key()
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{
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local track=$1; shift
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echo $__DEFER__SCOPE_ID,$track
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}
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__defer__defer_key()
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{
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local track=$1; shift
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local defer_ix=$1; shift
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echo $__DEFER__SCOPE_ID,$track,$defer_ix
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}
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__defer__ndefers()
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{
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local track=$1; shift
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echo ${__DEFER__NJOBS[$(__defer__ndefer_key $track)]}
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}
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__defer__run()
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{
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local track=$1; shift
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local defer_ix=$1; shift
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local defer_key=$(__defer__defer_key $track $defer_ix)
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${__DEFER__JOBS[$defer_key]}
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unset __DEFER__JOBS[$defer_key]
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}
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__defer__schedule()
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{
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local track=$1; shift
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local ndefers=$(__defer__ndefers $track)
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local ndefers_key=$(__defer__ndefer_key $track)
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local defer_key=$(__defer__defer_key $track $ndefers)
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local defer="$@"
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__DEFER__JOBS[$defer_key]="$defer"
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__DEFER__NJOBS[$ndefers_key]=$((ndefers + 1))
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}
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__defer__scope_wipe()
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{
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__DEFER__NJOBS[$(__defer__ndefer_key d)]=0
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__DEFER__NJOBS[$(__defer__ndefer_key p)]=0
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}
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defer_scope_push()
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{
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((__DEFER__SCOPE_ID++))
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__defer__scope_wipe
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}
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defer_scope_pop()
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{
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local defer_ix
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for ((defer_ix=$(__defer__ndefers p); defer_ix-->0; )); do
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__defer__run p $defer_ix
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done
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for ((defer_ix=$(__defer__ndefers d); defer_ix-->0; )); do
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__defer__run d $defer_ix
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done
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__defer__scope_wipe
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((__DEFER__SCOPE_ID--))
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}
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defer()
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{
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__defer__schedule d "$@"
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}
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defer_prio()
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{
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__defer__schedule p "$@"
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}
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defer_scopes_cleanup()
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{
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while ((__DEFER__SCOPE_ID >= 0)); do
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defer_scope_pop
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done
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}
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in_defer_scope()
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{
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local ret
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defer_scope_push
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"$@"
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ret=$?
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defer_scope_pop
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return $ret
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}
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__defer__scope_wipe
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