llama : Add test for model load cancellation

tests/CMakeLists.txt

@@ -50,6 +50,7 @@ llama_build_and_test_executable(test-grad0.cpp)
 llama_build_and_test_executable(test-backend-ops.cpp)
 
 llama_build_and_test_executable(test-rope.cpp)
+llama_build_and_test_executable(test-model-load-cancel.cpp)
 
 # dummy executable - not installed
 get_filename_component(TEST_TARGET test-c.c NAME_WE)

tests/test-model-load-cancel.cpp

@@ -0,0 +1,17 @@
+#include "llama.h"
+
+#include <cstdlib>
+#include <tuple>
+
+int main(void) {
+    llama_backend_init(false);
+    auto params = llama_model_params{};
+    params.use_mmap = false;
+    params.progress_callback = [](float progress, void * ctx){
+        std::ignore = ctx;
+        return progress > 0.50;
+    };
+    auto * model = llama_load_model_from_file("../models/7B/ggml-model-f16.gguf", params);
+    llama_backend_free();
+    return model == nullptr ? EXIT_SUCCESS : EXIT_FAILURE;
+}