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libutil/util_lockfile: allow for custom lock wait/retry time

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The default values for repeated attempts at acquiring a file lock created
by util_lockfile are on the order of seconds.  Let's leave this the
default, but allow for a caller to specify smaller values by adding
cw (custom_wait) functions and by switching from using sleep to usleep.

Reviewed-by: Anthony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
This commit is contained in:
Matthew Rosato
2024-04-11 14:23:23 -04:00
committed by Steffen Eiden
parent 0a01719477
commit f5f806af06
2 changed files with 58 additions and 9 deletions
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4
include/lib/util_lockfile.h
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@@ -18,7 +18,11 @@
#define UTIL_LOCKFILE_ERR 4 /* Other, unexpected error conditions */
int util_lockfile_lock(char *lockfile, int retries);
int util_lockfile_lock_cw(char *lockfile, int retries, unsigned int waitinc,
unsigned int maxwait);
int util_lockfile_parent_lock(char *lockfile, int retries);
int util_lockfile_parent_lock_cw(char *lockfile, int retries,
unsigned int waitinc, unsigned int maxwait);
int util_lockfile_release(char *lockfile);
int util_lockfile_parent_release(char *lockfile);