Merge "nativeloader: Add CloseNativeLibrary() method" into nyc-dev

am: acd3c71784

* commit 'acd3c71784d4207b478f411413f109281a83ef36':
  nativeloader: Add CloseNativeLibrary() method

Change-Id: I109d4fd3b688720c5260a2b40641e25122085a5f

libnativeloader/include/nativeloader/native_loader.h

@@ -43,6 +43,9 @@ void* OpenNativeLibrary(JNIEnv* env,
                         jobject class_loader,
                         jstring library_path);
 
+__attribute__((visibility("default")))
+bool CloseNativeLibrary(void* handle);
+
 #if defined(__ANDROID__)
 // Look up linker namespace by class_loader. Returns nullptr if
 // there is no namespace associated with the class_loader.

libnativeloader/native_loader.cpp

@@ -255,6 +255,10 @@ void* OpenNativeLibrary(JNIEnv* env,
 #endif
 }
 
+bool CloseNativeLibrary(void* handle) {
+  return dlclose(handle) == 0;
+}
+
 #if defined(__ANDROID__)
 android_namespace_t* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader) {
   std::lock_guard<std::mutex> guard(g_namespaces_mutex);