feat(c-api) Update wasm-c-api repository

lib/c-api/tests/wasm_c_api/wasm-c-api/README.md

@@ -94,6 +94,7 @@ Currently, known implementations of this API are included in
 * V8 natively (both C and C++)
 * Wabt (only C?)
 * Wasmtime (only C?)
+* [Wasmer](https://github.com/wasmerio/wasmer/tree/master/lib/c-api) (only C, C++ coming soon)
 
 
 ### TODO

lib/c-api/tests/wasm_c_api/wasm-c-api/example/callback.c

@@ -35,27 +35,27 @@ void wasm_val_print(wasm_val_t val) {
 
 // A function to be called from Wasm code.
 own wasm_trap_t* print_callback(
-  const wasm_val_t args[], wasm_val_t results[]
+  const wasm_val_vec_t* args, wasm_val_vec_t* results
 ) {
   printf("Calling back...\n> ");
-  wasm_val_print(args[0]);
+  wasm_val_print(args->data[0]);
   printf("\n");
 
-  wasm_val_copy(&results[0], &args[0]);
+  wasm_val_copy(&results->data[0], &args->data[0]);
   return NULL;
 }
 
 
 // A function closure.
 own wasm_trap_t* closure_callback(
-  void* env, const wasm_val_t args[], wasm_val_t results[]
+  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[0].kind = WASM_I32;
-  results[0].of.i32 = (int32_t)i;
+  results->data[0].kind = WASM_I32;
+  results->data[0].of.i32 = (int32_t)i;
   return NULL;
 }
 
@@ -68,7 +68,7 @@ int main(int argc, const char* argv[]) {
 
   // Load binary.
   printf("Loading binary...\n");
-  FILE* file = fopen("callback.wasm", "r");
+  FILE* file = fopen("callback.wasm", "rb");
   if (!file) {
     printf("> Error loading module!\n");
     return 1;
@@ -108,11 +108,12 @@ int main(int argc, const char* argv[]) {
 
   // Instantiate.
   printf("Instantiating module...\n");
-  const wasm_extern_t* imports[] = {
+  wasm_extern_t* externs[] = {
     wasm_func_as_extern(print_func), wasm_func_as_extern(closure_func)
   };
+  wasm_extern_vec_t imports = WASM_ARRAY_VEC(externs);
   own wasm_instance_t* instance =
-    wasm_instance_new(store, module, imports, NULL);
+    wasm_instance_new(store, module, &imports, NULL);
   if (!instance) {
     printf("> Error instantiating module!\n");
     return 1;
@@ -140,13 +141,11 @@ int main(int argc, const char* argv[]) {
 
   // Call.
   printf("Calling export...\n");
-  wasm_val_t args[2];
-  args[0].kind = WASM_I32;
-  args[0].of.i32 = 3;
-  args[1].kind = WASM_I32;
-  args[1].of.i32 = 4;
-  wasm_val_t results[1];
-  if (wasm_func_call(run_func, args, results)) {
+  wasm_val_t as[2] = { WASM_I32_VAL(3), WASM_I32_VAL(4) };
+  wasm_val_t rs[1] = { WASM_INIT_VAL };
+  wasm_val_vec_t args = WASM_ARRAY_VEC(as);
+  wasm_val_vec_t results = WASM_ARRAY_VEC(rs);
+  if (wasm_func_call(run_func, &args, &results)) {
     printf("> Error calling function!\n");
     return 1;
   }
@@ -155,7 +154,7 @@ int main(int argc, const char* argv[]) {
 
   // Print result.
   printf("Printing result...\n");
-  printf("> %u\n", results[0].of.i32);
+  printf("> %u\n", rs[0].of.i32);
 
   // Shut down.
   printf("Shutting down...\n");

lib/c-api/tests/wasm_c_api/wasm-c-api/example/callback.cc

@@ -35,7 +35,7 @@ auto operator<<(std::ostream& out, const wasm::Val& val) -> std::ostream& {
 
 // A function to be called from Wasm code.
 auto print_callback(
-  const wasm::Val args[], wasm::Val results[]
+  const wasm::vec<wasm::Val>& args, wasm::vec<wasm::Val>& results
 ) -> wasm::own<wasm::Trap> {
   std::cout << "Calling back..." << std::endl << "> " << args[0] << std::endl;
   results[0] = args[0].copy();
@@ -45,7 +45,7 @@ auto print_callback(
 
 // A function closure.
 auto closure_callback(
-  void* env, const wasm::Val args[], wasm::Val results[]
+  void* env, const wasm::vec<wasm::Val>& args, wasm::vec<wasm::Val>& results
 ) -> wasm::own<wasm::Trap> {
   auto i = *reinterpret_cast<int*>(env);
   std::cout << "Calling back closure..." << std::endl;
@@ -103,7 +103,8 @@ void run() {
 
   // Instantiate.
   std::cout << "Instantiating module..." << std::endl;
-  wasm::Extern* imports[] = {print_func.get(), closure_func.get()};
+  auto imports = wasm::vec<wasm::Extern*>::make(
+    print_func.get(), closure_func.get());
   auto instance = wasm::Instance::make(store, module.get(), imports);
   if (!instance) {
     std::cout << "> Error instantiating module!" << std::endl;
@@ -121,8 +122,8 @@ void run() {
 
   // Call.
   std::cout << "Calling export..." << std::endl;
-  wasm::Val args[] = {wasm::Val::i32(3), wasm::Val::i32(4)};
-  wasm::Val results[1];
+  auto args = wasm::vec<wasm::Val>::make(wasm::Val::i32(3), wasm::Val::i32(4));
+  auto results = wasm::vec<wasm::Val>::make_uninitialized(1);
   if (run_func->call(args, results)) {
     std::cout << "> Error calling function!" << std::endl;
     exit(1);

lib/c-api/tests/wasm_c_api/wasm-c-api/example/finalize.c

@@ -20,7 +20,7 @@ void finalize(void* data) {
 void run_in_store(wasm_store_t* store) {
   // Load binary.
   printf("Loading binary...\n");
-  FILE* file = fopen("finalize.wasm", "r");
+  FILE* file = fopen("finalize.wasm", "rb");
   if (!file) {
     printf("> Error loading module!\n");
     exit(1);
@@ -50,8 +50,9 @@ void run_in_store(wasm_store_t* store) {
   printf("Instantiating modules...\n");
   for (int i = 0; i <= iterations; ++i) {
     if (i % (iterations / 10) == 0) printf("%d\n", i);
+    wasm_extern_vec_t imports = WASM_EMPTY_VEC;
     own wasm_instance_t* instance =
-      wasm_instance_new(store, module, NULL, NULL);
+      wasm_instance_new(store, module, &imports, NULL);
     if (!instance) {
       printf("> Error instantiating module %d!\n", i);
       exit(1);

lib/c-api/tests/wasm_c_api/wasm-c-api/example/finalize.cc

@@ -46,7 +46,8 @@ void run_in_store(wasm::Store* store) {
   std::cout << "Instantiating modules..." << std::endl;
   for (int i = 0; i <= iterations; ++i) {
     if (i % (iterations / 10) == 0) std::cout << i << std::endl;
-    auto instance = wasm::Instance::make(store, module.get(), nullptr);
+    auto imports = wasm::vec<wasm::Extern*>::make();
+    auto instance = wasm::Instance::make(store, module.get(), imports);
     if (!instance) {
       std::cout << "> Error instantiating module " << i << "!" << std::endl;
       exit(1);

lib/c-api/tests/wasm_c_api/wasm-c-api/example/global.c

@@ -39,9 +39,11 @@ wasm_func_t* get_export_func(const wasm_extern_vec_t* exports, size_t i) {
 
 #define check_call(func, type, expected) \
   { \
-    wasm_val_t results[1]; \
-    wasm_func_call(func, NULL, results); \
-    check(results[0], type, expected); \
+    wasm_val_t vs[1]; \
+    wasm_val_vec_t args = WASM_EMPTY_VEC; \
+    wasm_val_vec_t results = WASM_ARRAY_VEC(vs); \
+    wasm_func_call(func, &args, &results); \
+    check(vs[0], type, expected); \
   }
 
 
@@ -53,7 +55,7 @@ int main(int argc, const char* argv[]) {
 
   // Load binary.
   printf("Loading binary...\n");
-  FILE* file = fopen("global.wasm", "r");
+  FILE* file = fopen("global.wasm", "rb");
   if (!file) {
     printf("> Error loading module!\n");
     return 1;
@@ -90,16 +92,16 @@ int main(int argc, const char* argv[]) {
   own wasm_globaltype_t* var_i64_type = wasm_globaltype_new(
     wasm_valtype_new(WASM_I64), WASM_VAR);
 
-  wasm_val_t val_f32_1 = {.kind = WASM_F32, .of = {.f32 = 1}};
+  wasm_val_t val_f32_1 = WASM_F32_VAL(1);
   own wasm_global_t* const_f32_import =
     wasm_global_new(store, const_f32_type, &val_f32_1);
-  wasm_val_t val_i64_2 = {.kind = WASM_I64, .of = {.i64 = 2}};
+  wasm_val_t val_i64_2 = WASM_I64_VAL(2);
   own wasm_global_t* const_i64_import =
     wasm_global_new(store, const_i64_type, &val_i64_2);
-  wasm_val_t val_f32_3 = {.kind = WASM_F32, .of = {.f32 = 3}};
+  wasm_val_t val_f32_3 = WASM_F32_VAL(3);
   own wasm_global_t* var_f32_import =
     wasm_global_new(store, var_f32_type, &val_f32_3);
-  wasm_val_t val_i64_4 = {.kind = WASM_I64, .of = {.i64 = 4}};
+  wasm_val_t val_i64_4 = WASM_I64_VAL(4);
   own wasm_global_t* var_i64_import =
     wasm_global_new(store, var_i64_type, &val_i64_4);
 
@@ -110,14 +112,15 @@ int main(int argc, const char* argv[]) {
 
   // Instantiate.
   printf("Instantiating module...\n");
-  const wasm_extern_t* imports[] = {
+  wasm_extern_t* externs[] = {
     wasm_global_as_extern(const_f32_import),
     wasm_global_as_extern(const_i64_import),
     wasm_global_as_extern(var_f32_import),
     wasm_global_as_extern(var_i64_import)
   };
+  wasm_extern_vec_t imports = WASM_ARRAY_VEC(externs);
   own wasm_instance_t* instance =
-    wasm_instance_new(store, module, imports, NULL);
+    wasm_instance_new(store, module, &imports, NULL);
   if (!instance) {
     printf("> Error instantiating module!\n");
     return 1;
@@ -175,13 +178,13 @@ int main(int argc, const char* argv[]) {
   check_call(get_var_i64_export, i64, 8);
 
   // Modify variables through API and check again.
-  wasm_val_t val33 = {.kind = WASM_F32, .of = {.f32 = 33}};
+  wasm_val_t val33 = WASM_F32_VAL(33);
   wasm_global_set(var_f32_import, &val33);
-  wasm_val_t val34 = {.kind = WASM_I64, .of = {.i64 = 34}};
+  wasm_val_t val34 = WASM_I64_VAL(34);
   wasm_global_set(var_i64_import, &val34);
-  wasm_val_t val37 = {.kind = WASM_F32, .of = {.f32 = 37}};
+  wasm_val_t val37 = WASM_F32_VAL(37);
   wasm_global_set(var_f32_export, &val37);
-  wasm_val_t val38 = {.kind = WASM_I64, .of = {.i64 = 38}};
+  wasm_val_t val38 = WASM_I64_VAL(38);
   wasm_global_set(var_i64_export, &val38);
 
   check_global(var_f32_import, f32, 33);
@@ -195,14 +198,19 @@ int main(int argc, const char* argv[]) {
   check_call(get_var_i64_export, i64, 38);
 
   // Modify variables through calls and check again.
-  wasm_val_t args73[] = { {.kind = WASM_F32, .of = {.f32 = 73}} };
-  wasm_func_call(set_var_f32_import, args73, NULL);
-  wasm_val_t args74[] = { {.kind = WASM_I64, .of = {.i64 = 74}} };
-  wasm_func_call(set_var_i64_import, args74, NULL);
-  wasm_val_t args77[] = { {.kind = WASM_F32, .of = {.f32 = 77}} };
-  wasm_func_call(set_var_f32_export, args77, NULL);
-  wasm_val_t args78[] = { {.kind = WASM_I64, .of = {.i64 = 78}} };
-  wasm_func_call(set_var_i64_export, args78, NULL);
+  wasm_val_vec_t res = WASM_EMPTY_VEC;
+  wasm_val_t vs73[] = { WASM_F32_VAL(73) };
+  wasm_val_vec_t args73 = WASM_ARRAY_VEC(vs73);
+  wasm_func_call(set_var_f32_import, &args73, &res);
+  wasm_val_t vs74[] = { WASM_I64_VAL(74) };
+  wasm_val_vec_t args74 = WASM_ARRAY_VEC(vs74);
+  wasm_func_call(set_var_i64_import, &args74, &res);
+  wasm_val_t vs77[] = { WASM_F32_VAL(77) };
+  wasm_val_vec_t args77 = WASM_ARRAY_VEC(vs77);
+  wasm_func_call(set_var_f32_export, &args77, &res);
+  wasm_val_t vs78[] = { WASM_I64_VAL(78) };
+  wasm_val_vec_t args78 = WASM_ARRAY_VEC(vs78);
+  wasm_func_call(set_var_i64_export, &args78, &res);
 
   check_global(var_f32_import, f32, 73);
   check_global(var_i64_import, i64, 74);

lib/c-api/tests/wasm_c_api/wasm-c-api/example/global.cc

@@ -32,17 +32,19 @@ void check(T actual, U expected) {
 }
 
 auto call(const wasm::Func* func) -> wasm::Val {
-  wasm::Val results[1];
-  if (func->call(nullptr, results)) {
+  auto args = wasm::vec<wasm::Val>::make();
+  auto results = wasm::vec<wasm::Val>::make_uninitialized(1);
+  if (func->call(args, results)) {
     std::cout << "> Error calling function!" << std::endl;
     exit(1);
   }
   return results[0].copy();
 }
 
 void call(const wasm::Func* func, wasm::Val&& arg) {
-  wasm::Val args[1] = {std::move(arg)};
-  if (func->call(args)) {
+  auto args = wasm::vec<wasm::Val>::make(std::move(arg));
+  auto results = wasm::vec<wasm::Val>::make();
+  if (func->call(args, results)) {
     std::cout << "> Error calling function!" << std::endl;
     exit(1);
   }
@@ -95,10 +97,10 @@ void run() {
 
   // Instantiate.
   std::cout << "Instantiating module..." << std::endl;
-  wasm::Extern* imports[] = {
+  auto imports = wasm::vec<wasm::Extern*>::make(
     const_f32_import.get(), const_i64_import.get(),
     var_f32_import.get(), var_i64_import.get()
-  };
+  );
   auto instance = wasm::Instance::make(store, module.get(), imports);
   if (!instance) {
     std::cout << "> Error instantiating module!" << std::endl;

lib/c-api/tests/wasm_c_api/wasm-c-api/example/hello.c

@@ -9,7 +9,7 @@
 
 // A function to be called from Wasm code.
 own wasm_trap_t* hello_callback(
-  const wasm_val_t args[], wasm_val_t results[]
+  const wasm_val_vec_t* args, wasm_val_vec_t* results
 ) {
   printf("Calling back...\n");
   printf("> Hello World!\n");
@@ -25,7 +25,7 @@ int main(int argc, const char* argv[]) {
 
   // Load binary.
   printf("Loading binary...\n");
-  FILE* file = fopen("hello.wasm", "r");
+  FILE* file = fopen("hello.wasm", "rb");
   if (!file) {
     printf("> Error loading module!\n");
     return 1;
@@ -61,9 +61,10 @@ int main(int argc, const char* argv[]) {
 
   // Instantiate.
   printf("Instantiating module...\n");
-  const wasm_extern_t* imports[] = { wasm_func_as_extern(hello_func) };
+  wasm_extern_t* externs[] = { wasm_func_as_extern(hello_func) };
+  wasm_extern_vec_t imports = WASM_ARRAY_VEC(externs);
   own wasm_instance_t* instance =
-    wasm_instance_new(store, module, imports, NULL);
+    wasm_instance_new(store, module, &imports, NULL);
   if (!instance) {
     printf("> Error instantiating module!\n");
     return 1;
@@ -90,7 +91,9 @@ int main(int argc, const char* argv[]) {
 
   // Call.
   printf("Calling export...\n");
-  if (wasm_func_call(run_func, NULL, NULL)) {
+  wasm_val_vec_t args = WASM_EMPTY_VEC;
+  wasm_val_vec_t results = WASM_EMPTY_VEC;
+  if (wasm_func_call(run_func, &args, &results)) {
     printf("> Error calling function!\n");
     return 1;
   }

lib/c-api/tests/wasm_c_api/wasm-c-api/example/hello.cc

@@ -9,7 +9,7 @@
 
 // A function to be called from Wasm code.
 auto hello_callback(
-  const wasm::Val args[], wasm::Val results[]
+  const wasm::vec<wasm::Val>& args, wasm::vec<wasm::Val>& results
 ) -> wasm::own<wasm::Trap> {
   std::cout << "Calling back..." << std::endl;
   std::cout << "> Hello world!" << std::endl;
@@ -55,7 +55,7 @@ void run() {
 
   // Instantiate.
   std::cout << "Instantiating module..." << std::endl;
-  wasm::Extern* imports[] = {hello_func.get()};
+  auto imports = wasm::vec<wasm::Extern*>::make(hello_func.get());
   auto instance = wasm::Instance::make(store, module.get(), imports);
   if (!instance) {
     std::cout << "> Error instantiating module!" << std::endl;
@@ -73,7 +73,9 @@ void run() {
 
   // Call.
   std::cout << "Calling export..." << std::endl;
-  if (run_func->call()) {
+  auto args = wasm::vec<wasm::Val>::make();
+  auto results = wasm::vec<wasm::Val>::make();
+  if (run_func->call(args, results)) {
     std::cout << "> Error calling function!" << std::endl;
     exit(1);
   }