Initial checkin of gRPC to third_party/

third_party/grpc/src/core/census/aggregation.h

 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
  */
 
-#ifndef CryptoKey_h
-#define CryptoKey_h
+#include <stddef.h>
 
-#include "bindings/core/v8/ScriptWrappable.h"
-#include "modules/crypto/NormalizeAlgorithm.h"
-#include "platform/heap/Handle.h"
-#include "public/platform/WebCryptoKey.h"
-#include "wtf/Forward.h"
-#include "wtf/text/WTFString.h"
+#ifndef GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
+#define GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
 
-namespace blink {
-
-class CryptoResult;
-
-class CryptoKey final : public GarbageCollectedFinalized<CryptoKey>, public ScriptWrappable {
-    DEFINE_WRAPPERTYPEINFO();
-public:
-    static CryptoKey* create(const WebCryptoKey& key)
-    {
-        return new CryptoKey(key);
-    }
-
-    ~CryptoKey();
-
-    String type() const;
-    bool extractable() const;
-    ScriptValue algorithm(ScriptState*);
-    Vector<String> usages() const;
-
-    const WebCryptoKey& key() const { return m_key; }
-
-    // If the key cannot be used with the indicated algorithm, returns false
-    // and completes the CryptoResult with an error.
-    bool canBeUsedForAlgorithm(const WebCryptoAlgorithm&, WebCryptoKeyUsage, CryptoResult*) const;
-
-    // On failure, these return false and complete the CryptoResult with an error.
-    static bool parseFormat(const String&, WebCryptoKeyFormat&, CryptoResult*);
-    static bool parseUsageMask(const Vector<String>&, WebCryptoKeyUsageMask&, CryptoResult*);
-
-    DEFINE_INLINE_TRACE() { }
-
-protected:
-    explicit CryptoKey(const WebCryptoKey&);
-
-    const WebCryptoKey m_key;
+/** Structure used to describe an aggregation type. */
+struct census_aggregation_ops {
+  /* Create a new aggregation. The pointer returned can be used in future calls
+     to clone(), free(), record(), data() and reset(). */
+  void *(*create)(const void *create_arg);
+  /* Make a copy of an aggregation created by create() */
+  void *(*clone)(const void *aggregation);
+  /* Destroy an aggregation created by create() */
+  void (*free)(void *aggregation);
+  /* Record a new value against aggregation. */
+  void (*record)(void *aggregation, double value);
+  /* Return current aggregation data. The caller must cast this object into
+     the correct type for the aggregation result. The object returned can be
+     freed by using free_data(). */
+  void *(*data)(const void *aggregation);
+  /* free data returned by data() */
+  void (*free_data)(void *data);
+  /* Reset an aggregation to default (zero) values. */
+  void (*reset)(void *aggregation);
+  /* Merge 'from' aggregation into 'to'. Both aggregations must be compatible */
+  void (*merge)(void *to, const void *from);
+  /* Fill buffer with printable string version of aggregation contents. For
+     debugging only. Returns the number of bytes added to buffer (a value == n
+     implies the buffer was of insufficient size). */
+  size_t (*print)(const void *aggregation, char *buffer, size_t n);
 };
 
-} // namespace blink
-
-#endif // CryptoKey_h
+#endif /* GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H */