llama2c : use a destructor to prevent memory leaks

examples/convert-llama2c-to-ggml/convert-llama2c-to-ggml.cpp

@@ -75,7 +75,7 @@ typedef struct {
     int seq_len; // max sequence length
 } Config;
 
-typedef struct {
+struct TransformerWeights {
     // token embedding table
     float* token_embedding_table;    // (vocab_size, dim)
     // weights for rmsnorms
@@ -97,7 +97,22 @@ typedef struct {
     // float* freq_cis_imag; // (seq_len, dim/2)
     // (optional) classifier weights for the logits, on the last layer
     float* wcls;
-} TransformerWeights;
+
+    ~TransformerWeights() {
+        delete[] token_embedding_table;
+        delete[] rms_att_weight;
+        delete[] rms_ffn_weight;
+        delete[] wq;
+        delete[] wk;
+        delete[] wv;
+        delete[] wo;
+        delete[] w1;
+        delete[] w2;
+        delete[] w3;
+        delete[] rms_final_weight;
+        delete[] wcls;
+    }
+};
 
 void malloc_weights(TransformerWeights* w, Config* p, bool shared_weights) {
     // we calloc instead of malloc to keep valgrind happy
@@ -173,21 +188,6 @@ int checkpoint_init_weights(TransformerWeights *w, Config* p, FILE* f, bool shar
     return 0;
 }
 
-void free_weights(TransformerWeights* w) {
-    delete[] w->token_embedding_table;
-    delete[] w->rms_att_weight;
-    delete[] w->rms_ffn_weight;
-    delete[] w->wq;
-    delete[] w->wk;
-    delete[] w->wv;
-    delete[] w->wo;
-    delete[] w->w1;
-    delete[] w->w2;
-    delete[] w->w3;
-    delete[] w->rms_final_weight;
-    delete[] w->wcls;
-}
-
 void print_sample_weights(TransformerWeights *w){
     printf("----- Quick print of first of the weight vales of all the variables\n");
     printf("%f\n", w->token_embedding_table[0]);
@@ -915,7 +915,7 @@ int main(int argc, char ** argv) {
         return 1;
     }
     Config config;
-    TransformerWeights weights;
+    TransformerWeights weights = {};
     {
         FILE *file = fopen(params.fn_llama2c_model, "rb");
         if (!file) { printf("Unable to open the checkpoint file %s!\n", params.fn_llama2c_model); return 1; }
@@ -957,6 +957,5 @@ int main(int argc, char ** argv) {
     printf("Saving llama.c model file %s in ggml format at %s\n", params.fn_llama2c_model, params.fn_llama2c_output_model);
 
     ggml_free(model.ctx);
-    free_weights(&weights);
     return 0;
 }