1 files changed, 163 insertions, 0 deletions
diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/multi.c b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/multi.c
new file mode 100644
index 00000000..a1c8fa9f
--- /dev/null
+++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/wasm-c-api/src/multi.c
@@ -0,0 +1,163 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "wasm_c_api.h"
+
+#define own
+
+// A function to be called from Wasm code.
+own wasm_trap_t* callback(
+  const wasm_val_vec_t* args, wasm_val_vec_t* results
+) {
+  printf("Calling back...\n> ");
+  printf("> %"PRIu32" %"PRIu64" %"PRIu64" %"PRIu32"\n",
+    args->data[0].of.i32, args->data[1].of.i64,
+    args->data[2].of.i64, args->data[3].of.i32);
+  printf("\n");
+
+  wasm_val_copy(&results->data[0], &args->data[3]);
+  wasm_val_copy(&results->data[1], &args->data[1]);
+  wasm_val_copy(&results->data[2], &args->data[2]);
+  wasm_val_copy(&results->data[3], &args->data[0]);
+  return NULL;
+}
+
+
+// A function closure.
+own wasm_trap_t* closure_callback(
+  void* env, const wasm_val_vec_t* args, wasm_val_vec_t* results
+) {
+  int i = *(int*)env;
+  printf("Calling back closure...\n");
+  printf("> %d\n", i);
+
+  results->data[0].kind = WASM_I32;
+  results->data[0].of.i32 = (int32_t)i;
+  return NULL;
+}
+
+
+int main(int argc, const char* argv[]) {
+  // Initialize.
+  printf("Initializing...\n");
+  wasm_engine_t* engine = wasm_engine_new();
+  wasm_store_t* store = wasm_store_new(engine);
+
+  // Load binary.
+  printf("Loading binary...\n");
+#if WASM_ENABLE_AOT != 0 && WASM_ENABLE_INTERP == 0
+  FILE* file = fopen("multi.aot", "rb");
+#else
+  FILE* file = fopen("multi.wasm", "rb");
+#endif
+  if (!file) {
+    printf("> Error loading module!\n");
+    return 1;
+  }
+  fseek(file, 0L, SEEK_END);
+  size_t file_size = ftell(file);
+  fseek(file, 0L, SEEK_SET);
+  wasm_byte_vec_t binary;
+  wasm_byte_vec_new_uninitialized(&binary, file_size);
+  if (fread(binary.data, file_size, 1, file) != 1) {
+    printf("> Error loading module!\n");
+    fclose(file);
+    return 1;
+  }
+  fclose(file);
+
+  // Compile.
+  printf("Compiling module...\n");
+  own wasm_module_t* module = wasm_module_new(store, &binary);
+  if (!module) {
+    printf("> Error compiling module!\n");
+    return 1;
+  }
+
+  wasm_byte_vec_delete(&binary);
+
+  // Create external print functions.
+  printf("Creating callback...\n");
+  wasm_valtype_t* types[4] = {
+    wasm_valtype_new_i32(), wasm_valtype_new_i64(),
+    wasm_valtype_new_i64(), wasm_valtype_new_i32()
+  };
+  own wasm_valtype_vec_t tuple1, tuple2;
+  wasm_valtype_vec_new(&tuple1, 4, types);
+  wasm_valtype_vec_copy(&tuple2, &tuple1);
+  own wasm_functype_t* callback_type = wasm_functype_new(&tuple1, &tuple2);
+  own wasm_func_t* callback_func =
+    wasm_func_new(store, callback_type, callback);
+
+  wasm_functype_delete(callback_type);
+
+  // Instantiate.
+  printf("Instantiating module...\n");
+  wasm_extern_t* externs[] = { wasm_func_as_extern(callback_func) };
+  wasm_extern_vec_t imports = WASM_ARRAY_VEC(externs);
+  own wasm_instance_t* instance =
+    wasm_instance_new(store, module, &imports, NULL);
+  if (!instance) {
+    printf("> Error instantiating module!\n");
+    return 1;
+  }
+
+  wasm_func_delete(callback_func);
+
+  // Extract export.
+  printf("Extracting export...\n");
+  own wasm_extern_vec_t exports;
+  wasm_instance_exports(instance, &exports);
+  if (exports.size == 0) {
+    printf("> Error accessing exports!\n");
+    return 1;
+  }
+  const wasm_func_t* run_func = wasm_extern_as_func(exports.data[0]);
+  if (run_func == NULL) {
+    printf("> Error accessing export!\n");
+    return 1;
+  }
+
+  wasm_module_delete(module);
+  wasm_instance_delete(instance);
+
+  // Call.
+  printf("Calling export...\n");
+  wasm_val_t vals[4] = {
+    WASM_I32_VAL(1), WASM_I64_VAL(2), WASM_I64_VAL(3), WASM_I32_VAL(4)
+  };
+  wasm_val_t res[4] = {
+    WASM_INIT_VAL, WASM_INIT_VAL, WASM_INIT_VAL, WASM_INIT_VAL
+  };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(vals);
+  wasm_val_vec_t results = WASM_ARRAY_VEC(res);
+  wasm_trap_t *trap = wasm_func_call(run_func, &args, &results);
+  if (trap) {
+      printf("> Error calling function!\n");
+      wasm_trap_delete(trap);
+      return 1;
+  }
+
+  wasm_extern_vec_delete(&exports);
+
+  // Print result.
+  printf("Printing result...\n");
+  printf("> %"PRIu32" %"PRIu64" %"PRIu64" %"PRIu32"\n",
+    res[0].of.i32, res[1].of.i64, res[2].of.i64, res[3].of.i32);
+
+  assert(res[0].of.i32 == 4);
+  assert(res[1].of.i64 == 3);
+  assert(res[2].of.i64 == 2);
+  assert(res[3].of.i32 == 1);
+
+  // Shut down.
+  printf("Shutting down...\n");
+  wasm_store_delete(store);
+  wasm_engine_delete(engine);
+
+  // All done.
+  printf("Done.\n");
+  return 0;
+}