c api: expose option for dynamic level size target

Summary: Closes https://github.com/facebook/rocksdb/pull/1587

Differential Revision: D4245923

Pulled By: yiwu-arbug

fbshipit-source-id: 6ee7291

db/c.cc

@@ -1526,6 +1526,11 @@ void rocksdb_options_set_max_bytes_for_level_base(
   opt->rep.max_bytes_for_level_base = n;
 }
 
+void rocksdb_options_set_level_compaction_dynamic_level_bytes(
+    rocksdb_options_t* opt, unsigned char v) {
+  opt->rep.level_compaction_dynamic_level_bytes = v;
+}
+
 void rocksdb_options_set_max_bytes_for_level_multiplier(rocksdb_options_t* opt,
                                                         double n) {
   opt->rep.max_bytes_for_level_multiplier = n;

include/rocksdb/c.h

@@ -565,6 +565,9 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_set_target_file_size_multiplier(
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_max_bytes_for_level_base(
     rocksdb_options_t*, uint64_t);
 extern ROCKSDB_LIBRARY_API void
+rocksdb_options_set_level_compaction_dynamic_level_bytes(rocksdb_options_t*,
+                                                         unsigned char);
+extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_max_bytes_for_level_multiplier(rocksdb_options_t*, double);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_max_bytes_for_level_multiplier_additional(