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Re-backport atomic job locking from 93v- (re: 52067c3d, 595a0a56)

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[This commit was previously reverted because it seemed to cause the
build to fail on Cygwin. But I just re-tested it, and it's fine. It
may be that my Cygwin installation at the time was defective.]

Something similar was previously done in 07cc71b8 from a Debian
patch, and eventually reverted; it redefined the ast atomic
functions asoincint() and asodecint() to be gcc-specific. This
imports the upstream version from the ksh 93v- beta instead.

This commit is based on an OpenSUSE patch:
https://build.opensuse.org/package/view_file/shells/ksh/ksh93-joblock.dif

src/cmd/ksh93/include/jobs.h:
- Replace job locking mechanism with the 93v- version which uses
  the atomic libast functions asoincint(), asogetint() and
  asodecint(). See: src/lib/libast/man/aso.3

src/cmd/ksh93/sh/jobs.c: job_subsave():
- Revert gcc optimiser bug workaround from c258a04f.
  It should now be unnecessary.
This commit is contained in:
Martijn Dekker 2022-08-01 04:05:06 +02:00
parent b07d7b2097
commit 9c69fac793
4 changed files with 11 additions and 16 deletions
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2
src/cmd/ksh93/include/version.h
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@ -17,7 +17,7 @@
#include <releaseflags.h>
#define SH_RELEASE_FORK "93u+m" /* only change if you develop a new ksh93 fork */
#define SH_RELEASE_SVER "1.0.0-rc.5" /* semantic version number: https://semver.org */
#define SH_RELEASE_SVER "1.0.0-rc.6" /* semantic version number: https://semver.org */
#define SH_RELEASE_DATE "2022-07-31" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_CPYR "(c) 2020-2022 Contributors to ksh " SH_RELEASE_FORK