Add rocksdb_open_with_ttl function in C API

Summary:
Change-Id: Ie6f9b10bce459f6bf0ade0e5877264b4e10da3f5
Signed-off-by: Stuart <Stuart.Hu@emc.com>
Closes https://github.com/facebook/rocksdb/pull/3553

Differential Revision: D7144833

Pulled By: sagar0

fbshipit-source-id: 815225fa6e560d8a5bc47ffd0a98118b107ce264

db/c.cc

@@ -32,6 +32,7 @@
 #include "rocksdb/universal_compaction.h"
 #include "rocksdb/utilities/backupable_db.h"
 #include "rocksdb/utilities/checkpoint.h"
+#include "rocksdb/utilities/db_ttl.h"
 #include "rocksdb/utilities/optimistic_transaction_db.h"
 #include "rocksdb/utilities/transaction.h"
 #include "rocksdb/utilities/transaction_db.h"
@@ -477,6 +478,20 @@ rocksdb_t* rocksdb_open(
   return result;
 }
 
+rocksdb_t* rocksdb_open_with_ttl(
+    const rocksdb_options_t* options,
+    const char* name,
+    int ttl,
+    char** errptr) {
+  rocksdb::DBWithTTL* db;
+  if (SaveError(errptr, rocksdb::DBWithTTL::Open(options->rep, std::string(name), &db, ttl))) {
+    return nullptr;
+  }
+  rocksdb_t* result = new rocksdb_t;
+  result->rep = db;
+  return result;
+}
+
 rocksdb_t* rocksdb_open_for_read_only(
     const rocksdb_options_t* options,
     const char* name,

include/rocksdb/c.h

@@ -129,6 +129,9 @@ typedef struct rocksdb_checkpoint_t rocksdb_checkpoint_t;
 extern ROCKSDB_LIBRARY_API rocksdb_t* rocksdb_open(
     const rocksdb_options_t* options, const char* name, char** errptr);
 
+extern ROCKSDB_LIBRARY_API rocksdb_t* rocksdb_open_with_ttl(
+    const rocksdb_options_t* options, const char* name, int ttl, char** errptr);
+
 extern ROCKSDB_LIBRARY_API rocksdb_t* rocksdb_open_for_read_only(
     const rocksdb_options_t* options, const char* name,
     unsigned char error_if_log_file_exist, char** errptr);