/*
 * Handlers for process resources limits.
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later.
 *
 */

#ifndef _HAPROXY_LIMITS_H
#define _HAPROXY_LIMITS_H
#include <errno.h>
#include <fcntl.h>
#include <sys/resource.h>
#include <haproxy/compat.h>

extern unsigned int rlim_fd_cur_at_boot;
extern unsigned int rlim_fd_max_at_boot;

/* returns 0 if the given limit was not set (reported as infinity), otherwise
 * returns the limit, useful to print limit values as strings in err messages
 * via LIM2A macros.
 */
static inline ulong normalize_rlim(rlim_t rlim)
{
	if (rlim == RLIM_INFINITY)
		return 0;

	return (ulong)rlim;
}

/* handlers to compute internal process limits, if they are not provided via
 * cmd line or via configuration file.
*/
int compute_ideal_maxpipes();
int compute_ideal_maxsock(int maxconn);
int check_if_maxsock_permitted(int maxsock);

/* handlers to manipulate system resources limits granted by OS to process and
 * to tie them up with the internal process limits
 */
int raise_rlim_nofile(struct rlimit *old_limit, struct rlimit *new_limit);

void set_global_maxconn(void);
void apply_nofile_limit(void);
void apply_memory_limit(void);
void check_nofile_lim_and_prealloc_fd(void);


#endif /* _HAPROXY_LIMITS_H */