feat: support multiple lora files & dynamic apply / remove lora

android/src/main/CMakeLists.txt

@@ -33,6 +33,7 @@ set(
     ${RNLLAMA_LIB_DIR}/sgemm.cpp
     ${RNLLAMA_LIB_DIR}/ggml-aarch64.c
     ${RNLLAMA_LIB_DIR}/rn-llama.hpp
+    ${CMAKE_SOURCE_DIR}/jni-utils.h
     ${CMAKE_SOURCE_DIR}/jni.cpp
 )
 

android/src/main/java/com/rnllama/LlamaContext.java

@@ -70,6 +70,8 @@ public LlamaContext(int id, ReactApplicationContext reactContext, ReadableMap pa
       params.hasKey("lora") ? params.getString("lora") : "",
       // float lora_scaled,
       params.hasKey("lora_scaled") ? (float) params.getDouble("lora_scaled") : 1.0f,
+      // ReadableArray lora_adapters,
+      params.hasKey("lora_list") ? params.getArray("lora_list") : null,
       // float rope_freq_base,
       params.hasKey("rope_freq_base") ? (float) params.getDouble("rope_freq_base") : 0.0f,
       // float rope_freq_scale
@@ -301,6 +303,22 @@ public String bench(int pp, int tg, int pl, int nr) {
     return bench(this.context, pp, tg, pl, nr);
   }
 
+  public int applyLoraAdapters(ReadableArray loraAdapters) {
+    int result = applyLoraAdapters(this.context, loraAdapters);
+    if (result != 0) {
+      throw new IllegalStateException("Failed to apply lora adapters");
+    }
+    return result;
+  }
+
+  public void removeLoraAdapters() {
+    removeLoraAdapters(this.context);
+  }
+
+  public WritableArray getLoadedLoraAdapters() {
+    return getLoadedLoraAdapters(this.context);
+  }
+
   public void release() {
     freeContext(context);
   }
@@ -406,6 +424,7 @@ protected static native long initContext(
     boolean vocab_only,
     String lora,
     float lora_scaled,
+    ReadableArray lora_list,
     float rope_freq_base,
     float rope_freq_scale,
     int pooling_type,
@@ -457,7 +476,7 @@ protected static native WritableMap doCompletion(
     double[][] logit_bias,
     float   dry_multiplier,
     float   dry_base,
-    int dry_allowed_length,    
+    int dry_allowed_length,
     int dry_penalty_last_n,
     String[] dry_sequence_breakers,
     PartialCompletionCallback partial_completion_callback
@@ -473,6 +492,9 @@ protected static native WritableMap embedding(
     int embd_normalize
   );
   protected static native String bench(long contextPtr, int pp, int tg, int pl, int nr);
+  protected static native int applyLoraAdapters(long contextPtr, ReadableArray loraAdapters);
+  protected static native void removeLoraAdapters(long contextPtr);
+  protected static native WritableArray getLoadedLoraAdapters(long contextPtr);
   protected static native void freeContext(long contextPtr);
   protected static native void logToAndroid();
 }

android/src/main/java/com/rnllama/RNLlama.java

@@ -413,6 +413,104 @@ protected void onPostExecute(String result) {
     tasks.put(task, "bench-" + contextId);
   }
 
+  public void applyLoraAdapters(double id, final ReadableArray loraAdapters, final Promise promise) {
+    final int contextId = (int) id;
+    AsyncTask task = new AsyncTask<Void, Void, Void>() {
+      private Exception exception;
+
+      @Override
+      protected Void doInBackground(Void... voids) {
+        try {
+          LlamaContext context = contexts.get(contextId);
+          if (context == null) {
+            throw new Exception("Context not found");
+          }
+          if (context.isPredicting()) {
+            throw new Exception("Context is busy");
+          }
+          context.applyLoraAdapters(loraAdapters);
+        } catch (Exception e) {
+          exception = e;
+        }
+        return null;
+      }
+
+      @Override
+      protected void onPostExecute(Void result) {
+        if (exception != null) {
+          promise.reject(exception);
+          return;
+        }
+      }
+    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+    tasks.put(task, "applyLoraAdapters-" + contextId);
+  }
+
+  public void removeLoraAdapters(double id, final Promise promise) {
+    final int contextId = (int) id;
+    AsyncTask task = new AsyncTask<Void, Void, Void>() {
+      private Exception exception;
+
+      @Override
+      protected Void doInBackground(Void... voids) {
+        try {
+          LlamaContext context = contexts.get(contextId);
+          if (context == null) {
+            throw new Exception("Context not found");
+          }
+          if (context.isPredicting()) {
+            throw new Exception("Context is busy");
+          }
+          context.removeLoraAdapters();
+        } catch (Exception e) {
+          exception = e;
+        }
+        return null;
+      }
+
+      @Override
+      protected void onPostExecute(Void result) {
+        if (exception != null) {
+          promise.reject(exception);
+          return;
+        }
+        promise.resolve(null);
+      }
+    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+    tasks.put(task, "removeLoraAdapters-" + contextId);
+  }
+
+  public void getLoadedLoraAdapters(double id, final Promise promise) {
+    final int contextId = (int) id;
+    AsyncTask task = new AsyncTask<Void, Void, ReadableArray>() {
+      private Exception exception;
+
+      @Override
+      protected ReadableArray doInBackground(Void... voids) {
+        try {
+          LlamaContext context = contexts.get(contextId);
+          if (context == null) {
+            throw new Exception("Context not found");
+          }
+          return context.getLoadedLoraAdapters();
+        } catch (Exception e) {
+          exception = e;
+        }
+        return null;
+      }
+
+      @Override
+      protected void onPostExecute(ReadableArray result) {
+        if (exception != null) {
+          promise.reject(exception);
+          return;
+        }
+        promise.resolve(result);
+      }
+    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+    tasks.put(task, "getLoadedLoraAdapters-" + contextId);
+  }
+
   public void releaseContext(double id, Promise promise) {
     final int contextId = (int) id;
     AsyncTask task = new AsyncTask<Void, Void, Void>() {

android/src/main/jni-utils.h

@@ -0,0 +1,94 @@
+#include <jni.h>
+
+// ReadableMap utils
+
+namespace readablearray {
+
+int size(JNIEnv *env, jobject readableArray) {
+    jclass arrayClass = env->GetObjectClass(readableArray);
+    jmethodID sizeMethod = env->GetMethodID(arrayClass, "size", "()I");
+    return env->CallIntMethod(readableArray, sizeMethod);
+}
+
+jobject getMap(JNIEnv *env, jobject readableArray, int index) {
+    jclass arrayClass = env->GetObjectClass(readableArray);
+    jmethodID getMapMethod = env->GetMethodID(arrayClass, "getMap", "(I)Lcom/facebook/react/bridge/ReadableMap;");
+    return env->CallObjectMethod(readableArray, getMapMethod, index);
+}
+
+// Other methods not used yet
+
+}
+
+namespace readablemap {
+
+bool hasKey(JNIEnv *env, jobject readableMap, const char *key) {
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID hasKeyMethod = env->GetMethodID(mapClass, "hasKey", "(Ljava/lang/String;)Z");
+    jstring jKey = env->NewStringUTF(key);
+    jboolean result = env->CallBooleanMethod(readableMap, hasKeyMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+int getInt(JNIEnv *env, jobject readableMap, const char *key, jint defaultValue) {
+    if (!hasKey(env, readableMap, key)) {
+        return defaultValue;
+    }
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID getIntMethod = env->GetMethodID(mapClass, "getInt", "(Ljava/lang/String;)I");
+    jstring jKey = env->NewStringUTF(key);
+    jint result = env->CallIntMethod(readableMap, getIntMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+bool getBool(JNIEnv *env, jobject readableMap, const char *key, jboolean defaultValue) {
+    if (!hasKey(env, readableMap, key)) {
+        return defaultValue;
+    }
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID getBoolMethod = env->GetMethodID(mapClass, "getBoolean", "(Ljava/lang/String;)Z");
+    jstring jKey = env->NewStringUTF(key);
+    jboolean result = env->CallBooleanMethod(readableMap, getBoolMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+long getLong(JNIEnv *env, jobject readableMap, const char *key, jlong defaultValue) {
+    if (!hasKey(env, readableMap, key)) {
+        return defaultValue;
+    }
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID getLongMethod = env->GetMethodID(mapClass, "getLong", "(Ljava/lang/String;)J");
+    jstring jKey = env->NewStringUTF(key);
+    jlong result = env->CallLongMethod(readableMap, getLongMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+float getFloat(JNIEnv *env, jobject readableMap, const char *key, jfloat defaultValue) {
+    if (!hasKey(env, readableMap, key)) {
+        return defaultValue;
+    }
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID getFloatMethod = env->GetMethodID(mapClass, "getDouble", "(Ljava/lang/String;)D");
+    jstring jKey = env->NewStringUTF(key);
+    jfloat result = env->CallDoubleMethod(readableMap, getFloatMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+jstring getString(JNIEnv *env, jobject readableMap, const char *key, jstring defaultValue) {
+    if (!hasKey(env, readableMap, key)) {
+        return defaultValue;
+    }
+    jclass mapClass = env->GetObjectClass(readableMap);
+    jmethodID getStringMethod = env->GetMethodID(mapClass, "getString", "(Ljava/lang/String;)Ljava/lang/String;");
+    jstring jKey = env->NewStringUTF(key);
+    jstring result = (jstring) env->CallObjectMethod(readableMap, getStringMethod, jKey);
+    env->DeleteLocalRef(jKey);
+    return result;
+}
+
+}