Add first c test to test the C api

lib/runtime-c-api/README.md

@@ -1,4 +1,8 @@
 # Wasmer Runtime C API
 
 ## Generating header files
-Run `make capi`
+Run `make capi` from wasmer project root directory
+
+## Running tests
+`cmake . && make && make test` from runtime-c-api/tests directory
+(TODO run this within a rust test)

lib/runtime-c-api/build.rs

@@ -15,8 +15,10 @@ fn main() {
 fn build() {
     let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
 
+    use cbindgen::Language;
     cbindgen::Builder::new()
         .with_crate(crate_dir)
+        .with_language(Language::C)
         .generate()
         .expect("Unable to generate bindings")
         .write_to_file("wasmer.h");

lib/runtime-c-api/src/lib.rs

@@ -23,6 +23,7 @@ pub extern "C" fn wasmer_import_object_new() -> *mut wasmer_import_object_t {
     Box::into_raw(Box::new(ImportObject::new())) as *mut wasmer_import_object_t
 }
 
+#[allow(clippy::cast_ptr_alignment)]
 #[no_mangle]
 pub extern "C" fn wasmer_import_object_destroy(import_object: *mut wasmer_import_object_t) {
     if !import_object.is_null() {
@@ -30,6 +31,7 @@ pub extern "C" fn wasmer_import_object_destroy(import_object: *mut wasmer_import
     }
 }
 
+#[allow(clippy::cast_ptr_alignment)]
 #[no_mangle]
 pub extern "C" fn wasmer_instantiate(
     mut instance: *mut wasmer_instance_t,

lib/runtime-c-api/tests/.gitignore

@@ -0,0 +1,12 @@
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+test-instantiate

lib/runtime-c-api/tests/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required (VERSION 2.6)
+project (WasmerCApiTests)
+
+add_executable(test-instantiate test-instantiate.c)
+
+target_link_libraries(test-instantiate
+        general "${CMAKE_SOURCE_DIR}/../../../target/debug/libwasmer_runtime_c_api.dylib")
+
+enable_testing()
+add_test(test-instantiate test-instantiate)
+

lib/runtime-c-api/tests/runtime_c_api_tests.rs

@@ -0,0 +1,4 @@
+#[test]
+fn test_c_api() {
+    // TODO run `cmake . && make && make test`
+}

lib/runtime-c-api/tests/test-instantiate.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include "../wasmer.h"
+
+int main()
+{
+    wasmer_import_object_t *import_object = wasmer_import_object_new();
+    wasmer_import_object_destroy(import_object);
+    return 0;
+}

lib/runtime-c-api/wasmer.h

@@ -1,24 +1,21 @@
-#include <cstdarg>
-#include <cstdint>
-#include <cstdlib>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
 
-enum class wasmer_compile_result_t {
+typedef enum {
   WASMER_COMPILE_OK = 1,
   WASMER_COMPILE_ERROR = 2,
-};
+} wasmer_compile_result_t;
 
-struct wasmer_import_object_t;
+typedef struct wasmer_import_object_t wasmer_import_object_t;
 
-struct wasmer_instance_t;
-
-extern "C" {
+typedef struct wasmer_instance_t wasmer_instance_t;
 
 void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
 
-wasmer_import_object_t *wasmer_import_object_new();
+wasmer_import_object_t *wasmer_import_object_new(void);
 
 wasmer_compile_result_t wasmer_instantiate(wasmer_instance_t *instance,
                                            const char *bytes,
                                            wasmer_import_object_t *import_object);
-
-} // extern "C"