Move cpus_in_affinity_mask() to cpu-set-util.[ch]

[thirdparty/systemd.git] / src / shared / cpu-set-util.h

/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once

#include <sched.h>

#include "macro.h"

DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE);
#define _cleanup_cpu_free_ _cleanup_(CPU_FREEp)

cpu_set_t* cpu_set_malloc(unsigned *ncpus);

/* This wraps the libc interface with a variable to keep the allocated size. */
typedef struct CPUSet {
        cpu_set_t *set;
        size_t allocated; /* in bytes */
} CPUSet;

static inline void cpu_set_reset(CPUSet *a) {
        assert((a->allocated > 0) == !!a->set);
        if (a->set)
                CPU_FREE(a->set);
        *a = (CPUSet) {};
}

int cpu_set_add_all(CPUSet *a, const CPUSet *b);

char* cpu_set_to_string(const CPUSet *a);
int parse_cpu_set_full(
                const char *rvalue,
                CPUSet *cpu_set,
                bool warn,
                const char *unit,
                const char *filename, unsigned line,
                const char *lvalue);
int parse_cpu_set_extend(
                const char *rvalue,
                CPUSet *old,
                bool warn,
                const char *unit,
                const char *filename,
                unsigned line,
                const char *lvalue);

static inline int parse_cpu_set(const char *rvalue, CPUSet *cpu_set){
        return parse_cpu_set_full(rvalue, cpu_set, false, NULL, NULL, 0, NULL);
}

int cpus_in_affinity_mask(void);