andreacavalli/rocksdb
0
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fix c_simple_example

Browse Source
This commit is contained in:
Igor Canadi 2015-01-12 18:17:30 -08:00
parent 15d2abbec3
commit 402c1152a7
1 changed files with 35 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

68
examples/c_simple_example.c
View File

@ -5,45 +5,47 @@
#include "rocksdb/c.h"
#include <unistd.h> // sysconf() - get CPU count
#include <unistd.h> // sysconf() - get CPU count
const char DBPath[] = "/tmp/rocksdb_simple_example";
int main(int argc, char **argv) {
rocksdb_t *db;
rocksdb_options_t *options = rocksdb_options_create();
// Optimize RocksDB. This is the easiest way to
// get RocksDB to perform well
long cpus = sysconf(_SC_NPROCESSORS_ONLN); // get # of online cores
rocksdb_options_increase_parallelism(options, (int)(cpus));
rocksdb_options_optimize_level_style_compaction(options, 0);
// create the DB if it's not already present
rocksdb_options_set_create_if_missing(options, 1);
rocksdb_t *db;
rocksdb_options_t *options = rocksdb_options_create();
// Optimize RocksDB. This is the easiest way to
// get RocksDB to perform well
long cpus = sysconf(_SC_NPROCESSORS_ONLN); // get # of online cores
rocksdb_options_increase_parallelism(options, (int)(cpus));
rocksdb_options_optimize_level_style_compaction(options, 0);
// create the DB if it's not already present
rocksdb_options_set_create_if_missing(options, 1);
// open DB
char *err = NULL;
db = rocksdb_open(options, DBPath, &err);
assert(!err);
// open DB
char *err = NULL;
db = rocksdb_open(options, DBPath, &err);
assert(!err);
// Put key-value
rocksdb_writeoptions_t *writeoptions = rocksdb_writeoptions_create();
const char key[] = "key";
const char *value = "value";
rocksdb_put(db, writeoptions, key, strlen (key), value, \
strlen (value) + 1, &err);
assert(!err);
// Get value
rocksdb_readoptions_t *readoptions = rocksdb_readoptions_create();
size_t len;
value = rocksdb_get(db, readoptions, key, strlen (key), &len, &err);
assert(!err);
assert(strcmp(value, "value") == 0);
// Put key-value
rocksdb_writeoptions_t *writeoptions = rocksdb_writeoptions_create();
const char key[] = "key";
const char *value = "value";
rocksdb_put(db, writeoptions, key, strlen(key), value, strlen(value) + 1,
&err);
assert(!err);
// Get value
rocksdb_readoptions_t *readoptions = rocksdb_readoptions_create();
size_t len;
char *returned_value =
rocksdb_get(db, readoptions, key, strlen(key), &len, &err);
assert(!err);
assert(strcmp(returned_value, "value") == 0);
free(returned_value);
// cleanup
rocksdb_writeoptions_destroy(writeoptions);
rocksdb_readoptions_destroy(readoptions);
rocksdb_options_destroy(options);
rocksdb_close(db);
// cleanup
rocksdb_writeoptions_destroy(writeoptions);
rocksdb_readoptions_destroy(readoptions);
rocksdb_options_destroy(options);
rocksdb_close(db);
return 0;
return 0;
}