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C API: support get usage and pinned_usage for cache 

Summary: Closes https://github.com/facebook/rocksdb/pull/1671

Differential Revision: D4327453

Pulled By: yiwu-arbug

fbshipit-source-id: bcdbc65
This commit is contained in:
siddontang 2016-12-15 17:14:06 -08:00 committed by Facebook Github Bot
parent 0ab6fc167f
commit 8f5d24ae68
3 changed files with 40 additions and 3 deletions
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13
db/c.cc
View File

@ -2242,6 +2242,11 @@ void rocksdb_readoptions_set_readahead_size(
opt->rep.readahead_size = v;
}
void rocksdb_readoptions_set_pin_data(rocksdb_readoptions_t* opt,
unsigned char v) {
opt->rep.pin_data = v;
}
rocksdb_writeoptions_t* rocksdb_writeoptions_create() {
return new rocksdb_writeoptions_t;
}
@ -2309,6 +2314,14 @@ void rocksdb_cache_set_capacity(rocksdb_cache_t* cache, size_t capacity) {
cache->rep->SetCapacity(capacity);
}
size_t rocksdb_cache_get_usage(rocksdb_cache_t* cache) {
return cache->rep->GetUsage();
}
size_t rocksdb_cache_get_pinned_usage(rocksdb_cache_t* cache) {
return cache->rep->GetPinnedUsage();
}
rocksdb_env_t* rocksdb_create_default_env() {
rocksdb_env_t* result = new rocksdb_env_t;
result->rep = Env::Default();

22
db/c_test.c
View File

@ -340,7 +340,7 @@ int main(int argc, char** argv) {
roptions = rocksdb_readoptions_create();
rocksdb_readoptions_set_verify_checksums(roptions, 1);
rocksdb_readoptions_set_fill_cache(roptions, 0);
rocksdb_readoptions_set_fill_cache(roptions, 1);
woptions = rocksdb_writeoptions_create();
rocksdb_writeoptions_set_sync(woptions, 1);
@ -437,6 +437,24 @@ int main(int argc, char** argv) {
rocksdb_compact_range_opt(db, coptions, "a", 1, "z", 1);
CheckGet(db, roptions, "foo", "hello");
// Simple check cache usage
StartPhase("cache_usage");
{
rocksdb_readoptions_set_pin_data(roptions, 1);
rocksdb_iterator_t* iter = rocksdb_create_iterator(db, roptions);
rocksdb_iter_seek(iter, "foo", 3);
size_t usage = rocksdb_cache_get_usage(cache);
CheckCondition(usage > 0);
size_t pin_usage = rocksdb_cache_get_pinned_usage(cache);
CheckCondition(pin_usage > 0);
rocksdb_iter_next(iter);
rocksdb_iter_destroy(iter);
rocksdb_readoptions_set_pin_data(roptions, 0);
}
StartPhase("writebatch");
{
rocksdb_writebatch_t* wb = rocksdb_writebatch_create();
@ -795,7 +813,7 @@ int main(int argc, char** argv) {
{
rocksdb_close(db);
rocksdb_destroy_db(options, dbname, &err);
CheckNoError(err)
CheckNoError(err);
rocksdb_options_t* db_options = rocksdb_options_create();
rocksdb_options_set_create_if_missing(db_options, 1);

6
include/rocksdb/c.h
View File

@ -875,6 +875,8 @@ extern ROCKSDB_LIBRARY_API void rocksdb_readoptions_set_tailing(
rocksdb_readoptions_t*, unsigned char);
extern ROCKSDB_LIBRARY_API void rocksdb_readoptions_set_readahead_size(
rocksdb_readoptions_t*, size_t);
extern ROCKSDB_LIBRARY_API void rocksdb_readoptions_set_pin_data(
rocksdb_readoptions_t*, unsigned char);
/* Write options */
@ -917,6 +919,10 @@ extern ROCKSDB_LIBRARY_API rocksdb_cache_t* rocksdb_cache_create_lru(
extern ROCKSDB_LIBRARY_API void rocksdb_cache_destroy(rocksdb_cache_t* cache);
extern ROCKSDB_LIBRARY_API void rocksdb_cache_set_capacity(
rocksdb_cache_t* cache, size_t capacity);
extern ROCKSDB_LIBRARY_API size_t
rocksdb_cache_get_usage(rocksdb_cache_t* cache);
extern ROCKSDB_LIBRARY_API size_t
rocksdb_cache_get_pinned_usage(rocksdb_cache_t* cache);
/* Env */