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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <stdbool.h>
#include "parse-util.h"
#include "time-util.h"
typedef enum PressureType {
PRESSURE_TYPE_SOME,
PRESSURE_TYPE_FULL,
} PressureType;
/* Averages are stored in fixed-point with 11 bit fractions */
typedef struct ResourcePressure {
loadavg_t avg10;
loadavg_t avg60;
loadavg_t avg300;
usec_t total;
} ResourcePressure;
/** Upstream 4.20+ format
*
* some avg10=0.22 avg60=0.17 avg300=1.11 total=58761459
* full avg10=0.23 avg60=0.16 avg300=1.08 total=58464525
*/
int read_resource_pressure(const char *path, PressureType type, ResourcePressure *ret);
/* Was the kernel compiled with CONFIG_PSI=y? 1 if yes, 0 if not, negative on error. */
int is_pressure_supported(void);
/* Default parameters for memory pressure watch logic in sd-event and PID 1 */
#define MEMORY_PRESSURE_DEFAULT_TYPE "some"
#define MEMORY_PRESSURE_DEFAULT_THRESHOLD_USEC (200 * USEC_PER_MSEC)
#define MEMORY_PRESSURE_DEFAULT_WINDOW_USEC (2 * USEC_PER_SEC)
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