get some basics working, still need to fix merge operators for post-1.0

master
Tyler Neely 10 years ago
parent d725d6df82
commit 95c21ea171
  1. 31
      src/ffi.rs
  2. 13
      src/main.rs
  3. 10
      src/merge_operator.rs
  4. 2
      src/rocksdb.rs
  5. 3
      src/rocksdb_options.rs

@ -15,48 +15,45 @@
*/
extern crate libc;
use self::libc::{c_char, c_int, c_void, size_t};
use std::ffi::CString;
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBOptions(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBInstance(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBWriteOptions(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBReadOptions(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBMergeOperator(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBBlockBasedTableOptions(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBCache(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBFilterPolicy(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBSnapshot(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBIterator(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBCFHandle(pub *const c_void);
#[derive(Copy, Clone)]
#[repr(C)]
pub struct RocksDBWriteBatch(pub *const c_void);
impl Copy for RocksDBOptions {}
impl Copy for RocksDBInstance {}
impl Copy for RocksDBWriteOptions {}
impl Copy for RocksDBReadOptions {}
impl Copy for RocksDBMergeOperator {}
impl Copy for RocksDBBlockBasedTableOptions {}
impl Copy for RocksDBCache {}
impl Copy for RocksDBFilterPolicy {}
impl Copy for RocksDBCompactionStyle {}
impl Copy for RocksDBCompressionType {}
impl Copy for RocksDBUniversalCompactionStyle {}
impl Copy for RocksDBSnapshot {}
impl Copy for RocksDBIterator {}
impl Copy for RocksDBCFHandle {}
impl Copy for RocksDBWriteBatch {}
pub fn new_bloom_filter(bits: c_int) -> RocksDBFilterPolicy {
unsafe {
rocksdb_filterpolicy_create_bloom(bits)
@ -329,7 +326,7 @@ fn internal() {
rocksdb_options_set_create_if_missing(opts, true);
let rustpath = "_rust_rocksdb_internaltest";
let cpath = CString::from_slice(rustpath.as_bytes());
let cpath = CString::new(rustpath).unwrap();
let cpath_ptr = cpath.as_ptr();
let err = 0 as *mut i8;

@ -71,8 +71,17 @@ fn custom_merge() {
db.merge(b"k1", b"d");
db.merge(b"k1", b"efg");
let m = db.merge(b"k1", b"h");
let r = db.get(b"k1");
assert!(r.unwrap().to_utf8().unwrap() == "abcdefgh");
db.get(b"k1").map( |value| {
match value.to_utf8() {
Some(v) =>
println!("retrieved utf8 value: {}", v),
None =>
println!("did not read valid utf-8 out of the db"),
}
})
.on_absent( || { println!("value not found") })
.on_error( |e| { println!("error retrieving value: {}", e) });
db.close();
RocksDB::destroy(opts, path).is_ok();
}

@ -56,8 +56,8 @@ pub extern "C" fn full_merge_callback(
&mut MergeOperands::new(operands_list,
operands_list_len,
num_operands);
let key: &[u8] = mem::transmute(slice::from_raw_buf(&raw_key, key_len as usize));
let oldval: &[u8] = mem::transmute(slice::from_raw_buf(&existing_value,
let key: &[u8] = mem::transmute(slice::from_raw_parts(&raw_key, key_len as usize));
let oldval: &[u8] = mem::transmute(slice::from_raw_parts(&existing_value,
existing_value_len as usize));
let mut result =
(cb.merge_fn)(key, Some(oldval), operands);
@ -67,7 +67,7 @@ pub extern "C" fn full_merge_callback(
assert!(!buf.is_null());
*new_value_length = result.len() as size_t;
*success = 1 as u8;
ptr::copy(&mut *buf, result.as_ptr() as *const c_void, result.len());
ptr::copy(result.as_ptr() as *mut c_void, &mut *buf, result.len());
buf as *const c_char
}
}
@ -83,7 +83,7 @@ pub extern "C" fn partial_merge_callback(
let operands = &mut MergeOperands::new(operands_list,
operands_list_len,
num_operands);
let key: &[u8] = mem::transmute(slice::from_raw_buf(&raw_key, key_len as usize));
let key: &[u8] = mem::transmute(slice::from_raw_parts(&raw_key, key_len as usize));
let mut result = (cb.merge_fn)(key, None, operands);
result.shrink_to_fit();
//TODO(tan) investigate zero-copy techniques to improve performance
@ -91,7 +91,7 @@ pub extern "C" fn partial_merge_callback(
assert!(!buf.is_null());
*new_value_length = 1 as size_t;
*success = 1 as u8;
ptr::copy(&mut *buf, result.as_ptr() as *const c_void, result.len());
ptr::copy(result.as_ptr() as *mut c_void, &mut *buf, result.len());
buf as *const c_char
}
}

@ -198,7 +198,7 @@ pub struct RocksDBVector {
impl Deref for RocksDBVector {
type Target = [u8];
fn deref(&self) -> &[u8] {
unsafe { slice::from_raw_mut_buf(self.base.deref(), self.len) }
unsafe { slice::from_raw_parts(self.base.get(), self.len) }
}
}

@ -22,13 +22,12 @@ use rocksdb_ffi;
use merge_operator::{MergeOperatorCallback, MergeOperands, destructor_callback, full_merge_callback,
partial_merge_callback, name_callback};
#[derive(Copy, Clone)]
pub struct RocksDBOptions {
pub inner: rocksdb_ffi::RocksDBOptions,
block_options: rocksdb_ffi::RocksDBBlockBasedTableOptions,
}
impl Copy for RocksDBOptions {}
impl RocksDBOptions {
pub fn new() -> RocksDBOptions {
unsafe {

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