Fix jemalloc allocator (#332)

* fix memory allocator

librocksdb_sys/Cargo.toml

@@ -25,8 +25,9 @@ cc = "1.0.3"
 cmake = "0.1"
 
 [dependencies.jemalloc-sys]
-version = ">= 0.1.8"
+version = "0.1.8"
 optional = true
+features = ["unprefixed_malloc_on_supported_platforms"]
 
 [dependencies.libz-sys]
 version = "1.0.25"

librocksdb_sys/build.rs

@@ -80,6 +80,7 @@ fn build_rocksdb() -> Build {
     let mut cfg = Config::new("rocksdb");
     if cfg!(feature = "jemalloc") && NO_JEMALLOC_TARGETS.iter().all(|i| !target.contains(i)) {
         cfg.register_dep("JEMALLOC").define("WITH_JEMALLOC", "ON");
+        println!("cargo:rustc-link-lib=static=jemalloc");
     }
     if cfg!(feature = "portable") {
         cfg.define("PORTABLE", "ON");

librocksdb_sys/src/lib.rs

@@ -354,7 +354,9 @@ extern "C" {
     ) -> *mut Options;
 
     // Memory Allocator
-    pub fn crocksdb_jemalloc_nodump_allocator_create() -> *mut DBMemoryAllocator;
+    pub fn crocksdb_jemalloc_nodump_allocator_create(
+        err: *mut *mut c_char,
+    ) -> *mut DBMemoryAllocator;
     pub fn crocksdb_memory_allocator_destroy(allocator: *mut DBMemoryAllocator);
 
     // Cache

src/rocksdb.rs

@@ -2386,7 +2386,7 @@ impl MemoryAllocator {
     pub fn new_jemalloc_memory_allocator() -> Result<MemoryAllocator, String> {
         unsafe {
             let allocator = MemoryAllocator {
-                inner: ffi_try!(crocksdb_ffi::crocksdb_jemalloc_nodump_allocator_create()),
+                inner: ffi_try!(crocksdb_jemalloc_nodump_allocator_create()),
             };
             Ok(allocator)
         }

src/rocksdb_options.rs

@@ -1878,7 +1878,7 @@ impl LRUCacheOptions {
         }
     }
 
-    pub fn set_memory_allocator(&mut self, allocator: &MemoryAllocator) {
+    pub fn set_memory_allocator(&mut self, allocator: MemoryAllocator) {
         unsafe {
             crocksdb_ffi::crocksdb_lru_cache_options_set_memory_allocator(
                 self.inner,