zwoop commented on code in PR #10694:
URL: https://github.com/apache/trafficserver/pull/10694#discussion_r1384387943
##########
include/api/Metrics.h:
##########
@@ -289,10 +280,126 @@ class Metrics
mutable std::mutex _mutex;
LookupTable _lookups;
- MetricBlobs _blobs;
+ BlobStorage _blobs;
uint16_t _cur_blob = 0;
uint16_t _cur_off = 0;
+public:
+ // These are sort of factory classes, using the Metrics singleton for all
storage etc.
+ class Gauge
+ {
+ public:
+ using self_type = Gauge;
+ using SpanType = Metrics::SpanType;
+
+ class AtomicType : public Metrics::AtomicType
+ {
+ };
+
+ static Metrics::IdType
+ create(const std::string_view name)
+ {
+ auto &instance = Metrics::instance();
+
+ return instance._create(name);
+ }
+
+ static AtomicType *
+ createPtr(const std::string_view name)
+ {
+ auto &instance = Metrics::instance();
+
+ return reinterpret_cast<AtomicType
*>(instance.lookup(instance._create(name)));
+ }
+
+ static Metrics::Gauge::SpanType
+ createSpan(size_t size, IdType *id = nullptr)
+ {
+ auto &instance = Metrics::instance();
+
+ return instance._createSpan(size, id);
+ }
+
+ static void
+ increment(AtomicType *metric, uint64_t val = 1)
+ {
+ ink_assert(metric);
+ metric->_value.fetch_add(val, MEMORY_ORDER);
+ }
+
+ static void
+ decrement(AtomicType *metric, uint64_t val = 1)
+ {
+ ink_assert(metric);
+ metric->_value.fetch_sub(val, MEMORY_ORDER);
+ }
+
+ static int64_t
+ load(AtomicType *metric)
+ {
+ ink_assert(metric);
+ return metric->_value.load();
+ }
+
+ static void
+ store(AtomicType *metric, int64_t val)
+ {
+ ink_assert(metric);
+ return metric->_value.store(val);
+ }
+
+ }; // class Gauge
+
+ class Counter
+ {
+ public:
+ using self_type = Counter;
+ using SpanType = Metrics::SpanType;
+
+ class AtomicType : public Metrics::AtomicType
+ {
+ };
+
+ static Metrics::IdType
+ create(const std::string_view name)
+ {
+ auto &instance = Metrics::instance();
+
+ return instance._create(name);
+ }
+
+ static AtomicType *
+ createPtr(const std::string_view name)
+ {
+ auto &instance = Metrics::instance();
+
+ return reinterpret_cast<AtomicType
*>(instance.lookup(instance._create(name)));
+ }
+
+ static Metrics::Counter::SpanType
+ createSpan(size_t size, IdType *id = nullptr)
+ {
+ auto &instance = Metrics::instance();
+
+ return instance._createSpan(size, id);
+ }
+
+ static void
+ increment(AtomicType *metric, uint64_t val = 1)
+ {
+ ink_assert(metric);
+ metric->_value.fetch_add(val, MEMORY_ORDER);
+ }
+
+ static int64_t
+ load(AtomicType *metric)
Review Comment:
Ah yeh, I remember now, it can't. I blame the Danes.
```
/Users/leif/apache/trafficserver/include/api/Metrics.h:395:30: error: static
member function cannot have 'const' qualifier
load(AtomicType *metric) const
```
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