1 files changed, 75 insertions, 0 deletions
diff --git a/toolkit/components/telemetry/TelemetryCommon.h b/toolkit/components/telemetry/TelemetryCommon.h
new file mode 100644
index 000000000..3beefd673
--- /dev/null
+++ b/toolkit/components/telemetry/TelemetryCommon.h
@@ -0,0 +1,75 @@
+/* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TelemetryCommon_h__
+#define TelemetryCommon_h__
+
+#include "nsTHashtable.h"
+#include "jsapi.h"
+#include "nsIScriptError.h"
+
+namespace mozilla {
+namespace Telemetry {
+namespace Common {
+
+template<class EntryType>
+class AutoHashtable : public nsTHashtable<EntryType>
+{
+public:
+  explicit AutoHashtable(uint32_t initLength =
+                         PLDHashTable::kDefaultInitialLength);
+  typedef bool (*ReflectEntryFunc)(EntryType *entry, JSContext *cx, JS::Handle<JSObject*> obj);
+  bool ReflectIntoJS(ReflectEntryFunc entryFunc, JSContext *cx, JS::Handle<JSObject*> obj);
+};
+
+template<class EntryType>
+AutoHashtable<EntryType>::AutoHashtable(uint32_t initLength)
+  : nsTHashtable<EntryType>(initLength)
+{
+}
+
+/**
+ * Reflect the individual entries of table into JS, usually by defining
+ * some property and value of obj.  entryFunc is called for each entry.
+ */
+template<typename EntryType>
+bool
+AutoHashtable<EntryType>::ReflectIntoJS(ReflectEntryFunc entryFunc,
+                                        JSContext *cx, JS::Handle<JSObject*> obj)
+{
+  for (auto iter = this->Iter(); !iter.Done(); iter.Next()) {
+    if (!entryFunc(iter.Get(), cx, obj)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool IsExpiredVersion(const char* aExpiration);
+bool IsInDataset(uint32_t aDataset, uint32_t aContainingDataset);
+bool CanRecordDataset(uint32_t aDataset, bool aCanRecordBase, bool aCanRecordExtended);
+
+/**
+ * Return the number of milliseconds since process start using monotonic
+ * timestamps (unaffected by system clock changes).
+ *
+ * @return NS_OK on success, NS_ERROR_NOT_AVAILABLE if TimeStamp doesn't have the data.
+ */
+nsresult MsSinceProcessStart(double* aResult);
+
+/**
+ * Dumps a log message to the Browser Console using the provided level.
+ *
+ * @param aLogLevel The level to use when displaying the message in the browser console
+ *        (e.g. nsIScriptError::warningFlag, ...).
+ * @param aMsg The text message to print to the console.
+ */
+void LogToBrowserConsole(uint32_t aLogLevel, const nsAString& aMsg);
+
+} // namespace Common
+} // namespace Telemetry
+} // namespace mozilla
+
+#endif // TelemetryCommon_h__