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/**
* @defgroup util_lockfile_h util_lockfile: File locking utility
* @{
* @brief Create file-based locks
*
* Copyright IBM Corp. 2022
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef LIB_UTIL_LOCKFILE_H
#define LIB_UTIL_LOCKFILE_H
#define UTIL_LOCKFILE_OK 0 /* Lock acquired/released successfully */
#define UTIL_LOCKFILE_LOCK_FAIL 1 /* Lock already held, ran out of retries */
#define UTIL_LOCKFILE_RELEASE_NONE 2 /* Lock not held */
#define UTIL_LOCKFILE_RELEASE_FAIL 3 /* Lock not held by specified pid */
#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);
int util_lockfile_peek_owner(char *lockfile, int *pid);
#endif /** LIB_UTIL_LOCKFILE_H @} */
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