tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# map[(scope_id,track,cleanup_id) -> cleanup_command]
5# track={d=default | p=priority}
6declare -A __DEFER__JOBS
7
8# map[(scope_id,track) -> # cleanup_commands]
9declare -A __DEFER__NJOBS
10
11# scope_id of the topmost scope.
12__DEFER__SCOPE_ID=0
13
14__defer__ndefer_key()
15{
16 local track=$1; shift
17
18 echo $__DEFER__SCOPE_ID,$track
19}
20
21__defer__defer_key()
22{
23 local track=$1; shift
24 local defer_ix=$1; shift
25
26 echo $__DEFER__SCOPE_ID,$track,$defer_ix
27}
28
29__defer__ndefers()
30{
31 local track=$1; shift
32
33 echo ${__DEFER__NJOBS[$(__defer__ndefer_key $track)]}
34}
35
36__defer__run()
37{
38 local track=$1; shift
39 local defer_ix=$1; shift
40 local defer_key=$(__defer__defer_key $track $defer_ix)
41
42 ${__DEFER__JOBS[$defer_key]}
43 unset __DEFER__JOBS[$defer_key]
44}
45
46__defer__schedule()
47{
48 local track=$1; shift
49 local ndefers=$(__defer__ndefers $track)
50 local ndefers_key=$(__defer__ndefer_key $track)
51 local defer_key=$(__defer__defer_key $track $ndefers)
52 local defer="$@"
53
54 __DEFER__JOBS[$defer_key]="$defer"
55 __DEFER__NJOBS[$ndefers_key]=$((ndefers + 1))
56}
57
58__defer__scope_wipe()
59{
60 __DEFER__NJOBS[$(__defer__ndefer_key d)]=0
61 __DEFER__NJOBS[$(__defer__ndefer_key p)]=0
62}
63
64defer_scope_push()
65{
66 ((__DEFER__SCOPE_ID++))
67 __defer__scope_wipe
68}
69
70defer_scope_pop()
71{
72 local defer_ix
73
74 for ((defer_ix=$(__defer__ndefers p); defer_ix-->0; )); do
75 __defer__run p $defer_ix
76 done
77
78 for ((defer_ix=$(__defer__ndefers d); defer_ix-->0; )); do
79 __defer__run d $defer_ix
80 done
81
82 __defer__scope_wipe
83 ((__DEFER__SCOPE_ID--))
84}
85
86defer()
87{
88 __defer__schedule d "$@"
89}
90
91defer_prio()
92{
93 __defer__schedule p "$@"
94}
95
96defer_scopes_cleanup()
97{
98 while ((__DEFER__SCOPE_ID >= 0)); do
99 defer_scope_pop
100 done
101}
102
103in_defer_scope()
104{
105 local ret
106
107 defer_scope_push
108 "$@"
109 ret=$?
110 defer_scope_pop
111
112 return $ret
113}
114
115__defer__scope_wipe