Add getters for options to the C API (#7094)

Summary:
Along with https://github.com/facebook/rocksdb/issues/6925 and https://github.com/facebook/rocksdb/issues/6998, this should add getters for all Options fields except several ones with non-trivial interface (for example rocksdb_options_set_min_level_to_compress).

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7094

Reviewed By: riversand963

Differential Revision: D22479800

Pulled By: pdillinger

fbshipit-source-id: d14f305e12cfe268d07e0fe229d55cef299c792a

db/c.cc

@@ -2459,6 +2459,10 @@ void rocksdb_options_set_max_compaction_bytes(rocksdb_options_t* opt,
   opt->rep.max_compaction_bytes = n;
 }
 
+uint64_t rocksdb_options_get_max_compaction_bytes(rocksdb_options_t* opt) {
+  return opt->rep.max_compaction_bytes;
+}
+
 void rocksdb_options_set_max_bytes_for_level_multiplier_additional(
     rocksdb_options_t* opt, int* level_values, size_t num_levels) {
   opt->rep.max_bytes_for_level_multiplier_additional.resize(num_levels);
@@ -2534,14 +2538,26 @@ void rocksdb_options_set_wal_recovery_mode(rocksdb_options_t* opt,int mode) {
   opt->rep.wal_recovery_mode = static_cast<WALRecoveryMode>(mode);
 }
 
+int rocksdb_options_get_wal_recovery_mode(rocksdb_options_t* opt) {
+  return static_cast<int>(opt->rep.wal_recovery_mode);
+}
+
 void rocksdb_options_set_compression(rocksdb_options_t* opt, int t) {
   opt->rep.compression = static_cast<CompressionType>(t);
 }
 
+int rocksdb_options_get_compression(rocksdb_options_t* opt) {
+  return opt->rep.compression;
+}
+
 void rocksdb_options_set_bottommost_compression(rocksdb_options_t* opt, int t) {
   opt->rep.bottommost_compression = static_cast<CompressionType>(t);
 }
 
+int rocksdb_options_get_bottommost_compression(rocksdb_options_t* opt) {
+  return opt->rep.bottommost_compression;
+}
+
 void rocksdb_options_set_compression_per_level(rocksdb_options_t* opt,
                                                int* level_values,
                                                size_t num_levels) {
@@ -2690,16 +2706,30 @@ void rocksdb_options_set_skip_log_error_on_recovery(
   opt->rep.skip_log_error_on_recovery = v;
 }
 
+unsigned char rocksdb_options_get_skip_log_error_on_recovery(
+    rocksdb_options_t* opt) {
+  return opt->rep.skip_log_error_on_recovery;
+}
+
 void rocksdb_options_set_stats_dump_period_sec(
     rocksdb_options_t* opt, unsigned int v) {
   opt->rep.stats_dump_period_sec = v;
 }
 
+unsigned int rocksdb_options_get_stats_dump_period_sec(rocksdb_options_t* opt) {
+  return opt->rep.stats_dump_period_sec;
+}
+
 void rocksdb_options_set_advise_random_on_open(
     rocksdb_options_t* opt, unsigned char v) {
   opt->rep.advise_random_on_open = v;
 }
 
+unsigned char rocksdb_options_get_advise_random_on_open(
+    rocksdb_options_t* opt) {
+  return opt->rep.advise_random_on_open;
+}
+
 void rocksdb_options_set_access_hint_on_compaction_start(
     rocksdb_options_t* opt, int v) {
   switch(v) {
@@ -2722,41 +2752,78 @@ void rocksdb_options_set_access_hint_on_compaction_start(
   }
 }
 
+int rocksdb_options_get_access_hint_on_compaction_start(
+    rocksdb_options_t* opt) {
+  return opt->rep.access_hint_on_compaction_start;
+}
+
 void rocksdb_options_set_use_adaptive_mutex(
     rocksdb_options_t* opt, unsigned char v) {
   opt->rep.use_adaptive_mutex = v;
 }
 
+unsigned char rocksdb_options_get_use_adaptive_mutex(rocksdb_options_t* opt) {
+  return opt->rep.use_adaptive_mutex;
+}
+
 void rocksdb_options_set_wal_bytes_per_sync(
     rocksdb_options_t* opt, uint64_t v) {
   opt->rep.wal_bytes_per_sync = v;
 }
 
+uint64_t rocksdb_options_get_wal_bytes_per_sync(rocksdb_options_t* opt) {
+  return opt->rep.wal_bytes_per_sync;
+}
+
 void rocksdb_options_set_bytes_per_sync(
     rocksdb_options_t* opt, uint64_t v) {
   opt->rep.bytes_per_sync = v;
 }
 
+uint64_t rocksdb_options_get_bytes_per_sync(rocksdb_options_t* opt) {
+  return opt->rep.bytes_per_sync;
+}
+
 void rocksdb_options_set_writable_file_max_buffer_size(rocksdb_options_t* opt,
                                                        uint64_t v) {
   opt->rep.writable_file_max_buffer_size = static_cast<size_t>(v);
 }
 
+uint64_t rocksdb_options_get_writable_file_max_buffer_size(
+    rocksdb_options_t* opt) {
+  return opt->rep.writable_file_max_buffer_size;
+}
+
 void rocksdb_options_set_allow_concurrent_memtable_write(rocksdb_options_t* opt,
                                                          unsigned char v) {
   opt->rep.allow_concurrent_memtable_write = v;
 }
 
+unsigned char rocksdb_options_get_allow_concurrent_memtable_write(
+    rocksdb_options_t* opt) {
+  return opt->rep.allow_concurrent_memtable_write;
+}
+
 void rocksdb_options_set_enable_write_thread_adaptive_yield(
     rocksdb_options_t* opt, unsigned char v) {
   opt->rep.enable_write_thread_adaptive_yield = v;
 }
 
+unsigned char rocksdb_options_get_enable_write_thread_adaptive_yield(
+    rocksdb_options_t* opt) {
+  return opt->rep.enable_write_thread_adaptive_yield;
+}
+
 void rocksdb_options_set_max_sequential_skip_in_iterations(
     rocksdb_options_t* opt, uint64_t v) {
   opt->rep.max_sequential_skip_in_iterations = v;
 }
 
+uint64_t rocksdb_options_get_max_sequential_skip_in_iterations(
+    rocksdb_options_t* opt) {
+  return opt->rep.max_sequential_skip_in_iterations;
+}
+
 void rocksdb_options_set_max_write_buffer_number(rocksdb_options_t* opt, int n) {
   opt->rep.max_write_buffer_number = n;
 }
@@ -2968,15 +3035,30 @@ void rocksdb_options_set_disable_auto_compactions(rocksdb_options_t* opt, int di
   opt->rep.disable_auto_compactions = disable;
 }
 
+unsigned char rocksdb_options_get_disable_auto_compactions(
+    rocksdb_options_t* opt) {
+  return opt->rep.disable_auto_compactions;
+}
+
 void rocksdb_options_set_optimize_filters_for_hits(rocksdb_options_t* opt, int v) {
   opt->rep.optimize_filters_for_hits = v;
 }
 
+unsigned char rocksdb_options_get_optimize_filters_for_hits(
+    rocksdb_options_t* opt) {
+  return opt->rep.optimize_filters_for_hits;
+}
+
 void rocksdb_options_set_delete_obsolete_files_period_micros(
     rocksdb_options_t* opt, uint64_t v) {
   opt->rep.delete_obsolete_files_period_micros = v;
 }
 
+uint64_t rocksdb_options_get_delete_obsolete_files_period_micros(
+    rocksdb_options_t* opt) {
+  return opt->rep.delete_obsolete_files_period_micros;
+}
+
 void rocksdb_options_prepare_for_bulk_load(rocksdb_options_t* opt) {
   opt->rep.PrepareForBulkLoad();
 }
@@ -2990,11 +3072,20 @@ void rocksdb_options_set_memtable_prefix_bloom_size_ratio(
   opt->rep.memtable_prefix_bloom_size_ratio = v;
 }
 
+double rocksdb_options_get_memtable_prefix_bloom_size_ratio(
+    rocksdb_options_t* opt) {
+  return opt->rep.memtable_prefix_bloom_size_ratio;
+}
+
 void rocksdb_options_set_memtable_huge_page_size(rocksdb_options_t* opt,
                                                  size_t v) {
   opt->rep.memtable_huge_page_size = v;
 }
 
+size_t rocksdb_options_get_memtable_huge_page_size(rocksdb_options_t* opt) {
+  return opt->rep.memtable_huge_page_size;
+}
+
 void rocksdb_options_set_hash_skip_list_rep(
     rocksdb_options_t *opt, size_t bucket_count,
     int32_t skiplist_height, int32_t skiplist_branching_factor) {
@@ -3029,31 +3120,56 @@ void rocksdb_options_set_max_successive_merges(
   opt->rep.max_successive_merges = v;
 }
 
+size_t rocksdb_options_get_max_successive_merges(rocksdb_options_t* opt) {
+  return opt->rep.max_successive_merges;
+}
+
 void rocksdb_options_set_bloom_locality(
     rocksdb_options_t* opt, uint32_t v) {
   opt->rep.bloom_locality = v;
 }
 
+uint32_t rocksdb_options_get_bloom_locality(rocksdb_options_t* opt) {
+  return opt->rep.bloom_locality;
+}
+
 void rocksdb_options_set_inplace_update_support(
     rocksdb_options_t* opt, unsigned char v) {
   opt->rep.inplace_update_support = v;
 }
 
+unsigned char rocksdb_options_get_inplace_update_support(
+    rocksdb_options_t* opt) {
+  return opt->rep.inplace_update_support;
+}
+
 void rocksdb_options_set_inplace_update_num_locks(
     rocksdb_options_t* opt, size_t v) {
   opt->rep.inplace_update_num_locks = v;
 }
 
+size_t rocksdb_options_get_inplace_update_num_locks(rocksdb_options_t* opt) {
+  return opt->rep.inplace_update_num_locks;
+}
+
 void rocksdb_options_set_report_bg_io_stats(
     rocksdb_options_t* opt, int v) {
   opt->rep.report_bg_io_stats = v;
 }
 
+unsigned char rocksdb_options_get_report_bg_io_stats(rocksdb_options_t* opt) {
+  return opt->rep.report_bg_io_stats;
+}
+
 void rocksdb_options_set_compaction_style(rocksdb_options_t *opt, int style) {
   opt->rep.compaction_style =
       static_cast<ROCKSDB_NAMESPACE::CompactionStyle>(style);
 }
 
+int rocksdb_options_get_compaction_style(rocksdb_options_t* opt) {
+  return opt->rep.compaction_style;
+}
+
 void rocksdb_options_set_universal_compaction_options(rocksdb_options_t *opt, rocksdb_universal_compaction_options_t *uco) {
   opt->rep.compaction_options_universal = *(uco->rep);
 }
@@ -3083,6 +3199,10 @@ void rocksdb_options_set_atomic_flush(rocksdb_options_t* opt,
   opt->rep.atomic_flush = atomic_flush;
 }
 
+unsigned char rocksdb_options_get_atomic_flush(rocksdb_options_t* opt) {
+  return opt->rep.atomic_flush;
+}
+
 rocksdb_ratelimiter_t* rocksdb_ratelimiter_create(
     int64_t rate_bytes_per_sec,
     int64_t refill_period_us,

db/c_test.c

@@ -1666,6 +1666,91 @@ int main(int argc, char** argv) {
     rocksdb_options_set_is_fd_close_on_exec(o, 1);
     CheckCondition(1 == rocksdb_options_get_is_fd_close_on_exec(o));
 
+    rocksdb_options_set_skip_log_error_on_recovery(o, 1);
+    CheckCondition(1 == rocksdb_options_get_skip_log_error_on_recovery(o));
+
+    rocksdb_options_set_stats_dump_period_sec(o, 18);
+    CheckCondition(18 == rocksdb_options_get_stats_dump_period_sec(o));
+
+    rocksdb_options_set_advise_random_on_open(o, 1);
+    CheckCondition(1 == rocksdb_options_get_advise_random_on_open(o));
+
+    rocksdb_options_set_access_hint_on_compaction_start(o, 3);
+    CheckCondition(3 == rocksdb_options_get_access_hint_on_compaction_start(o));
+
+    rocksdb_options_set_use_adaptive_mutex(o, 1);
+    CheckCondition(1 == rocksdb_options_get_use_adaptive_mutex(o));
+
+    rocksdb_options_set_bytes_per_sync(o, 19);
+    CheckCondition(19 == rocksdb_options_get_bytes_per_sync(o));
+
+    rocksdb_options_set_wal_bytes_per_sync(o, 20);
+    CheckCondition(20 == rocksdb_options_get_wal_bytes_per_sync(o));
+
+    rocksdb_options_set_writable_file_max_buffer_size(o, 21);
+    CheckCondition(21 == rocksdb_options_get_writable_file_max_buffer_size(o));
+
+    rocksdb_options_set_allow_concurrent_memtable_write(o, 1);
+    CheckCondition(1 == rocksdb_options_get_allow_concurrent_memtable_write(o));
+
+    rocksdb_options_set_enable_write_thread_adaptive_yield(o, 1);
+    CheckCondition(1 ==
+                   rocksdb_options_get_enable_write_thread_adaptive_yield(o));
+
+    rocksdb_options_set_max_sequential_skip_in_iterations(o, 22);
+    CheckCondition(22 ==
+                   rocksdb_options_get_max_sequential_skip_in_iterations(o));
+
+    rocksdb_options_set_disable_auto_compactions(o, 1);
+    CheckCondition(1 == rocksdb_options_get_disable_auto_compactions(o));
+
+    rocksdb_options_set_optimize_filters_for_hits(o, 1);
+    CheckCondition(1 == rocksdb_options_get_optimize_filters_for_hits(o));
+
+    rocksdb_options_set_delete_obsolete_files_period_micros(o, 23);
+    CheckCondition(23 ==
+                   rocksdb_options_get_delete_obsolete_files_period_micros(o));
+
+    rocksdb_options_set_memtable_prefix_bloom_size_ratio(o, 2.0);
+    CheckCondition(2.0 ==
+                   rocksdb_options_get_memtable_prefix_bloom_size_ratio(o));
+
+    rocksdb_options_set_max_compaction_bytes(o, 24);
+    CheckCondition(24 == rocksdb_options_get_max_compaction_bytes(o));
+
+    rocksdb_options_set_memtable_huge_page_size(o, 25);
+    CheckCondition(25 == rocksdb_options_get_memtable_huge_page_size(o));
+
+    rocksdb_options_set_max_successive_merges(o, 26);
+    CheckCondition(26 == rocksdb_options_get_max_successive_merges(o));
+
+    rocksdb_options_set_bloom_locality(o, 27);
+    CheckCondition(27 == rocksdb_options_get_bloom_locality(o));
+
+    rocksdb_options_set_inplace_update_support(o, 1);
+    CheckCondition(1 == rocksdb_options_get_inplace_update_support(o));
+
+    rocksdb_options_set_inplace_update_num_locks(o, 28);
+    CheckCondition(28 == rocksdb_options_get_inplace_update_num_locks(o));
+
+    rocksdb_options_set_report_bg_io_stats(o, 1);
+    CheckCondition(1 == rocksdb_options_get_report_bg_io_stats(o));
+
+    rocksdb_options_set_wal_recovery_mode(o, 2);
+    CheckCondition(2 == rocksdb_options_get_wal_recovery_mode(o));
+
+    rocksdb_options_set_compression(o, 5);
+    CheckCondition(5 == rocksdb_options_get_compression(o));
+
+    rocksdb_options_set_bottommost_compression(o, 4);
+    CheckCondition(4 == rocksdb_options_get_bottommost_compression(o));
+
+    rocksdb_options_set_compaction_style(o, 2);
+    CheckCondition(2 == rocksdb_options_get_compaction_style(o));
+
+    rocksdb_options_set_atomic_flush(o, 1);
+    CheckCondition(1 == rocksdb_options_get_atomic_flush(o));
+
     // Create a copy that should be equal to the original.
     rocksdb_options_t* copy;
     copy = rocksdb_options_create_copy(o);
@@ -1738,6 +1823,40 @@ int main(int argc, char** argv) {
     CheckCondition(
         1 == rocksdb_options_get_use_direct_io_for_flush_and_compaction(copy));
     CheckCondition(1 == rocksdb_options_get_is_fd_close_on_exec(copy));
+    CheckCondition(1 == rocksdb_options_get_skip_log_error_on_recovery(copy));
+    CheckCondition(18 == rocksdb_options_get_stats_dump_period_sec(copy));
+    CheckCondition(1 == rocksdb_options_get_advise_random_on_open(copy));
+    CheckCondition(3 ==
+                   rocksdb_options_get_access_hint_on_compaction_start(copy));
+    CheckCondition(1 == rocksdb_options_get_use_adaptive_mutex(copy));
+    CheckCondition(19 == rocksdb_options_get_bytes_per_sync(copy));
+    CheckCondition(20 == rocksdb_options_get_wal_bytes_per_sync(copy));
+    CheckCondition(21 ==
+                   rocksdb_options_get_writable_file_max_buffer_size(copy));
+    CheckCondition(1 ==
+                   rocksdb_options_get_allow_concurrent_memtable_write(copy));
+    CheckCondition(
+        1 == rocksdb_options_get_enable_write_thread_adaptive_yield(copy));
+    CheckCondition(22 ==
+                   rocksdb_options_get_max_sequential_skip_in_iterations(copy));
+    CheckCondition(1 == rocksdb_options_get_disable_auto_compactions(copy));
+    CheckCondition(1 == rocksdb_options_get_optimize_filters_for_hits(copy));
+    CheckCondition(
+        23 == rocksdb_options_get_delete_obsolete_files_period_micros(copy));
+    CheckCondition(2.0 ==
+                   rocksdb_options_get_memtable_prefix_bloom_size_ratio(copy));
+    CheckCondition(24 == rocksdb_options_get_max_compaction_bytes(copy));
+    CheckCondition(25 == rocksdb_options_get_memtable_huge_page_size(copy));
+    CheckCondition(26 == rocksdb_options_get_max_successive_merges(copy));
+    CheckCondition(27 == rocksdb_options_get_bloom_locality(copy));
+    CheckCondition(1 == rocksdb_options_get_inplace_update_support(copy));
+    CheckCondition(28 == rocksdb_options_get_inplace_update_num_locks(copy));
+    CheckCondition(1 == rocksdb_options_get_report_bg_io_stats(copy));
+    CheckCondition(2 == rocksdb_options_get_wal_recovery_mode(copy));
+    CheckCondition(5 == rocksdb_options_get_compression(copy));
+    CheckCondition(4 == rocksdb_options_get_bottommost_compression(copy));
+    CheckCondition(2 == rocksdb_options_get_compaction_style(copy));
+    CheckCondition(1 == rocksdb_options_get_atomic_flush(copy));
 
     // Copies should be independent.
     rocksdb_options_set_allow_ingest_behind(copy, 0);
@@ -1985,6 +2104,125 @@ int main(int argc, char** argv) {
     CheckCondition(0 == rocksdb_options_get_is_fd_close_on_exec(copy));
     CheckCondition(1 == rocksdb_options_get_is_fd_close_on_exec(o));
 
+    rocksdb_options_set_skip_log_error_on_recovery(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_skip_log_error_on_recovery(copy));
+    CheckCondition(1 == rocksdb_options_get_skip_log_error_on_recovery(o));
+
+    rocksdb_options_set_stats_dump_period_sec(copy, 218);
+    CheckCondition(218 == rocksdb_options_get_stats_dump_period_sec(copy));
+    CheckCondition(18 == rocksdb_options_get_stats_dump_period_sec(o));
+
+    rocksdb_options_set_advise_random_on_open(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_advise_random_on_open(copy));
+    CheckCondition(1 == rocksdb_options_get_advise_random_on_open(o));
+
+    rocksdb_options_set_access_hint_on_compaction_start(copy, 2);
+    CheckCondition(2 ==
+                   rocksdb_options_get_access_hint_on_compaction_start(copy));
+    CheckCondition(3 == rocksdb_options_get_access_hint_on_compaction_start(o));
+
+    rocksdb_options_set_use_adaptive_mutex(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_use_adaptive_mutex(copy));
+    CheckCondition(1 == rocksdb_options_get_use_adaptive_mutex(o));
+
+    rocksdb_options_set_bytes_per_sync(copy, 219);
+    CheckCondition(219 == rocksdb_options_get_bytes_per_sync(copy));
+    CheckCondition(19 == rocksdb_options_get_bytes_per_sync(o));
+
+    rocksdb_options_set_wal_bytes_per_sync(copy, 120);
+    CheckCondition(120 == rocksdb_options_get_wal_bytes_per_sync(copy));
+    CheckCondition(20 == rocksdb_options_get_wal_bytes_per_sync(o));
+
+    rocksdb_options_set_writable_file_max_buffer_size(copy, 121);
+    CheckCondition(121 ==
+                   rocksdb_options_get_writable_file_max_buffer_size(copy));
+    CheckCondition(21 == rocksdb_options_get_writable_file_max_buffer_size(o));
+
+    rocksdb_options_set_allow_concurrent_memtable_write(copy, 0);
+    CheckCondition(0 ==
+                   rocksdb_options_get_allow_concurrent_memtable_write(copy));
+    CheckCondition(1 == rocksdb_options_get_allow_concurrent_memtable_write(o));
+
+    rocksdb_options_set_enable_write_thread_adaptive_yield(copy, 0);
+    CheckCondition(
+        0 == rocksdb_options_get_enable_write_thread_adaptive_yield(copy));
+    CheckCondition(1 ==
+                   rocksdb_options_get_enable_write_thread_adaptive_yield(o));
+
+    rocksdb_options_set_max_sequential_skip_in_iterations(copy, 122);
+    CheckCondition(122 ==
+                   rocksdb_options_get_max_sequential_skip_in_iterations(copy));
+    CheckCondition(22 ==
+                   rocksdb_options_get_max_sequential_skip_in_iterations(o));
+
+    rocksdb_options_set_disable_auto_compactions(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_disable_auto_compactions(copy));
+    CheckCondition(1 == rocksdb_options_get_disable_auto_compactions(o));
+
+    rocksdb_options_set_optimize_filters_for_hits(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_optimize_filters_for_hits(copy));
+    CheckCondition(1 == rocksdb_options_get_optimize_filters_for_hits(o));
+
+    rocksdb_options_set_delete_obsolete_files_period_micros(copy, 123);
+    CheckCondition(
+        123 == rocksdb_options_get_delete_obsolete_files_period_micros(copy));
+    CheckCondition(23 ==
+                   rocksdb_options_get_delete_obsolete_files_period_micros(o));
+
+    rocksdb_options_set_memtable_prefix_bloom_size_ratio(copy, 4.0);
+    CheckCondition(4.0 ==
+                   rocksdb_options_get_memtable_prefix_bloom_size_ratio(copy));
+    CheckCondition(2.0 ==
+                   rocksdb_options_get_memtable_prefix_bloom_size_ratio(o));
+
+    rocksdb_options_set_max_compaction_bytes(copy, 124);
+    CheckCondition(124 == rocksdb_options_get_max_compaction_bytes(copy));
+    CheckCondition(24 == rocksdb_options_get_max_compaction_bytes(o));
+
+    rocksdb_options_set_memtable_huge_page_size(copy, 125);
+    CheckCondition(125 == rocksdb_options_get_memtable_huge_page_size(copy));
+    CheckCondition(25 == rocksdb_options_get_memtable_huge_page_size(o));
+
+    rocksdb_options_set_max_successive_merges(copy, 126);
+    CheckCondition(126 == rocksdb_options_get_max_successive_merges(copy));
+    CheckCondition(26 == rocksdb_options_get_max_successive_merges(o));
+
+    rocksdb_options_set_bloom_locality(copy, 127);
+    CheckCondition(127 == rocksdb_options_get_bloom_locality(copy));
+    CheckCondition(27 == rocksdb_options_get_bloom_locality(o));
+
+    rocksdb_options_set_inplace_update_support(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_inplace_update_support(copy));
+    CheckCondition(1 == rocksdb_options_get_inplace_update_support(o));
+
+    rocksdb_options_set_inplace_update_num_locks(copy, 128);
+    CheckCondition(128 == rocksdb_options_get_inplace_update_num_locks(copy));
+    CheckCondition(28 == rocksdb_options_get_inplace_update_num_locks(o));
+
+    rocksdb_options_set_report_bg_io_stats(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_report_bg_io_stats(copy));
+    CheckCondition(1 == rocksdb_options_get_report_bg_io_stats(o));
+
+    rocksdb_options_set_wal_recovery_mode(copy, 1);
+    CheckCondition(1 == rocksdb_options_get_wal_recovery_mode(copy));
+    CheckCondition(2 == rocksdb_options_get_wal_recovery_mode(o));
+
+    rocksdb_options_set_compression(copy, 4);
+    CheckCondition(4 == rocksdb_options_get_compression(copy));
+    CheckCondition(5 == rocksdb_options_get_compression(o));
+
+    rocksdb_options_set_bottommost_compression(copy, 3);
+    CheckCondition(3 == rocksdb_options_get_bottommost_compression(copy));
+    CheckCondition(4 == rocksdb_options_get_bottommost_compression(o));
+
+    rocksdb_options_set_compaction_style(copy, 1);
+    CheckCondition(1 == rocksdb_options_get_compaction_style(copy));
+    CheckCondition(2 == rocksdb_options_get_compaction_style(o));
+
+    rocksdb_options_set_atomic_flush(copy, 0);
+    CheckCondition(0 == rocksdb_options_get_atomic_flush(copy));
+    CheckCondition(1 == rocksdb_options_get_atomic_flush(o));
+
     rocksdb_options_destroy(copy);
     rocksdb_options_destroy(o);
   }

include/rocksdb/c.h

@@ -1098,44 +1098,76 @@ extern ROCKSDB_LIBRARY_API unsigned char
 rocksdb_options_get_is_fd_close_on_exec(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_skip_log_error_on_recovery(
     rocksdb_options_t*, unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_skip_log_error_on_recovery(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_stats_dump_period_sec(
     rocksdb_options_t*, unsigned int);
+extern ROCKSDB_LIBRARY_API unsigned int
+rocksdb_options_get_stats_dump_period_sec(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_advise_random_on_open(
     rocksdb_options_t*, unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_advise_random_on_open(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_access_hint_on_compaction_start(rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API int
+rocksdb_options_get_access_hint_on_compaction_start(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_use_adaptive_mutex(
     rocksdb_options_t*, unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char rocksdb_options_get_use_adaptive_mutex(
+    rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_bytes_per_sync(
     rocksdb_options_t*, uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_bytes_per_sync(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_wal_bytes_per_sync(
         rocksdb_options_t*, uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_wal_bytes_per_sync(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_writable_file_max_buffer_size(rocksdb_options_t*, uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_writable_file_max_buffer_size(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_allow_concurrent_memtable_write(rocksdb_options_t*,
                                                     unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_allow_concurrent_memtable_write(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_enable_write_thread_adaptive_yield(rocksdb_options_t*,
                                                        unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_enable_write_thread_adaptive_yield(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_max_sequential_skip_in_iterations(rocksdb_options_t*,
                                                       uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_max_sequential_skip_in_iterations(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_disable_auto_compactions(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_disable_auto_compactions(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_optimize_filters_for_hits(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_optimize_filters_for_hits(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_delete_obsolete_files_period_micros(rocksdb_options_t*,
                                                         uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_delete_obsolete_files_period_micros(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_prepare_for_bulk_load(
     rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_vector_rep(
     rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_prefix_bloom_size_ratio(
     rocksdb_options_t*, double);
+extern ROCKSDB_LIBRARY_API double
+rocksdb_options_get_memtable_prefix_bloom_size_ratio(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_max_compaction_bytes(
     rocksdb_options_t*, uint64_t);
+extern ROCKSDB_LIBRARY_API uint64_t
+rocksdb_options_get_max_compaction_bytes(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_hash_skip_list_rep(
     rocksdb_options_t*, size_t, int32_t, int32_t);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_hash_link_list_rep(
@@ -1148,17 +1180,29 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_set_min_level_to_compress(
 
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_memtable_huge_page_size(
     rocksdb_options_t*, size_t);
+extern ROCKSDB_LIBRARY_API size_t
+rocksdb_options_get_memtable_huge_page_size(rocksdb_options_t*);
 
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_max_successive_merges(
     rocksdb_options_t*, size_t);
+extern ROCKSDB_LIBRARY_API size_t
+rocksdb_options_get_max_successive_merges(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_bloom_locality(
     rocksdb_options_t*, uint32_t);
+extern ROCKSDB_LIBRARY_API uint32_t
+rocksdb_options_get_bloom_locality(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_inplace_update_support(
     rocksdb_options_t*, unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char
+rocksdb_options_get_inplace_update_support(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_inplace_update_num_locks(
     rocksdb_options_t*, size_t);
+extern ROCKSDB_LIBRARY_API size_t
+rocksdb_options_get_inplace_update_num_locks(rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_report_bg_io_stats(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API unsigned char rocksdb_options_get_report_bg_io_stats(
+    rocksdb_options_t*);
 
 enum {
   rocksdb_tolerate_corrupted_tail_records_recovery = 0,
@@ -1168,6 +1212,8 @@ enum {
 };
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_wal_recovery_mode(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API int rocksdb_options_get_wal_recovery_mode(
+    rocksdb_options_t*);
 
 enum {
   rocksdb_no_compression = 0,
@@ -1181,8 +1227,12 @@ enum {
 };
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_compression(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API int rocksdb_options_get_compression(
+    rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_bottommost_compression(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API int rocksdb_options_get_bottommost_compression(
+    rocksdb_options_t*);
 
 enum {
   rocksdb_level_compaction = 0,
@@ -1191,6 +1241,8 @@ enum {
 };
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_compaction_style(
     rocksdb_options_t*, int);
+extern ROCKSDB_LIBRARY_API int rocksdb_options_get_compaction_style(
+    rocksdb_options_t*);
 extern ROCKSDB_LIBRARY_API void
 rocksdb_options_set_universal_compaction_options(
     rocksdb_options_t*, rocksdb_universal_compaction_options_t*);
@@ -1200,6 +1252,8 @@ extern ROCKSDB_LIBRARY_API void rocksdb_options_set_ratelimiter(
     rocksdb_options_t* opt, rocksdb_ratelimiter_t* limiter);
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_atomic_flush(
     rocksdb_options_t* opt, unsigned char);
+extern ROCKSDB_LIBRARY_API unsigned char rocksdb_options_get_atomic_flush(
+    rocksdb_options_t* opt);
 
 extern ROCKSDB_LIBRARY_API void rocksdb_options_set_row_cache(
     rocksdb_options_t* opt, rocksdb_cache_t* cache