0ec8385bec
This is similar function as add, but will add the difference of previous value and the new one. This can be used if we want to periodically update the value with a new one but don't want to keep track of the old one. Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
51 lines
915 B
C
51 lines
915 B
C
/*
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* Copyright (c) 2024 Mustafa Abdullah Kus, Sparse Technology
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/net/prometheus/counter.h>
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#include <stdlib.h>
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#include <string.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(pm_counter, CONFIG_PROMETHEUS_LOG_LEVEL);
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int prometheus_counter_add(struct prometheus_counter *counter, uint64_t value)
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{
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if (counter == NULL) {
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return -EINVAL;
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}
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counter->value += value;
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return 0;
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}
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int prometheus_counter_set(struct prometheus_counter *counter, uint64_t value)
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{
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uint64_t old_value;
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if (counter == NULL) {
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return -EINVAL;
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}
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if (value == counter->value) {
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return 0;
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}
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old_value = counter->value;
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if (value < old_value) {
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LOG_DBG("Cannot set counter to a lower value (%" PRIu64 " < %" PRIu64 ")",
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value, old_value);
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return -EINVAL;
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}
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counter->value += (value - old_value);
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return 0;
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}
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