89 lines
2.0 KiB
V
89 lines
2.0 KiB
V
module metrics
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import sync.stdatomic
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struct CounterEntry {
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metric Metric
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index int
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}
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struct HistogramEntry {
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metric Metric
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pub mut:
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data shared []f64
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}
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[heap]
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struct DefaultMetricsCollector {
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mut:
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// The mutex for counters also applies to counter_indexes. Both data
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// structuress are only ever updated together. Note that only registering a
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// new metric actually changes these; all operations on already existing
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// metrics use atomic operations on the elements of the counters array.
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counters shared []u64
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counter_indexes map[string]CounterEntry
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histograms shared map[string]HistogramEntry
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}
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pub fn new_default_metrics_collector() &DefaultMetricsCollector {
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return &DefaultMetricsCollector{
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counters: []u64{}
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counter_indexes: map[string]CounterEntry{}
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histograms: map[string]HistogramEntry{}
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}
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}
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pub fn (mut c DefaultMetricsCollector) counter_register(value u64, metric Metric) {
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lock c.counters {
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c.counters << value
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c.counter_indexes[metric.str()] = CounterEntry{
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metric: metric
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index: c.counters.len - 1
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}
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}
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}
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pub fn (mut c DefaultMetricsCollector) counter_increment(metric Metric) {
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rlock c.counters {
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entry := c.counter_indexes[metric.str()]
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stdatomic.add_u64(&c.counters[entry.index], 1)
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}
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}
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pub fn (mut c DefaultMetricsCollector) counter_decrement(metric Metric) {
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rlock c.counters {
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entry := c.counter_indexes[metric.str()]
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stdatomic.sub_u64(&c.counters[entry.index], 1)
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}
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}
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pub fn (mut c DefaultMetricsCollector) counter_get(metric Metric) ?u64 {
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return rlock c.counters {
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entry := c.counter_indexes[metric.str()] or { return none }
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stdatomic.load_u64(&c.counters[entry.index])
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}
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}
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pub fn (mut c DefaultMetricsCollector) histogram_register(metric Metric) {
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lock c.histograms {
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c.histograms[metric.str()] = HistogramEntry{
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metric: metric
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data: []f64{}
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}
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}
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}
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pub fn (mut c DefaultMetricsCollector) histogram_add(value f64, metric Metric) {
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entry := rlock c.histograms {
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c.histograms[metric.str()]
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}
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lock entry.data {
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entry.data << value
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}
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}
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