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authorGravatar Alistair Veitch <aveitch@google.com>2015-08-31 16:57:32 -0700
committerGravatar Alistair Veitch <aveitch@google.com>2015-08-31 16:57:32 -0700
commit1c09accaad6668b68ae47a7f9638bc4b79429caa (patch)
treeaa235fed3fedd75d421c3c78af57027a7674d326 /src
parentaafe9725b058d3710209bf0c95911928428eb2f2 (diff)
change aggregation_ops to internal type
Diffstat (limited to 'src')
-rw-r--r--src/core/census/aggregation.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/core/census/aggregation.h b/src/core/census/aggregation.h
new file mode 100644
index 0000000000..e9bc6ada96
--- /dev/null
+++ b/src/core/census/aggregation.h
@@ -0,0 +1,66 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <stddef.h>
+
+#ifndef GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
+#define GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H
+
+/** 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);
+};
+
+#endif /* GRPC_INTERNAL_CORE_CENSUS_AGGREGATION_H */