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1871: chore: Add C examples r=syrusakbary a=jubianchi * [x] Add basic examples * [x] Add command to test the examples * [x] Update docs.wasmer.io with the new API changes. Namely: 4df7722 # Review - [ ] Add a short description of the the change to the CHANGELOG.md file Co-authored-by: jubianchi <[email protected]> Co-authored-by: Syrus <[email protected]> Co-authored-by: Syrus Akbary <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| *.o |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,47 @@ | ||
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| $(info Using provided WASMER_DIR=$(WASMER_DIR)) | ||
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| ifeq (,$(wildcard $(WASMER_DIR)/bin/wasmer)) | ||
| CFLAGS = -g -I$(WASMER_DIR)/include | ||
| LDFLAGS = -Wl,-rpath,$(WASMER_DIR)/lib | ||
| LDLIBS = -L$(WASMER_DIR)/lib -lwasmer | ||
| else | ||
| CFLAGS = -g -I$(shell $(WASMER_DIR)/bin/wasmer config --includedir) | ||
| LDFLAGS = -Wl,-rpath,$(shell $(WASMER_DIR)/bin/wasmer config --libdir) | ||
| LDLIBS = $(shell $(WASMER_DIR)/bin/wasmer config --libs) | ||
| endif | ||
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| $(info * CFLAGS: $(CFLAGS)) | ||
| $(info * LDFLAGS: $(LDFLAGS)) | ||
| $(info * LDLIBS: $(LDLIBS)) | ||
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| ALL = instance imports-exports exports-function exports-global memory | ||
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| .SILENT: instance instance.o | ||
| instance: instance.o | ||
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| .SILENT: imports-exports imports-exports.o | ||
| imports-exports: imports-exports.o | ||
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| .SILENT: exports-function exports-function.o | ||
| exports-function: exports-function.o | ||
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| .SILENT: exports-global exports-global.o | ||
| exports-global: exports-global.o | ||
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| .SILENT: memory memory.o | ||
| memory: memory.o | ||
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| .PHONY: all | ||
| all: $(ALL) | ||
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| .PHONY: run | ||
| .SILENT: run | ||
| run: $(ALL) | ||
| set -o errexit; \ | ||
| $(foreach example,$?,echo Running \"$(example)\" example; ./$(example); echo;) | ||
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| .SILENT: clean | ||
| .PHONY: clean | ||
| clean: | ||
| $(foreach file,$(ALL),rm -f $(file).o $(file)) |
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| #include <stdio.h> | ||
| #include "wasmer_wasm.h" | ||
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| int main(int argc, const char* argv[]) { | ||
| const char *wat_string = | ||
| "(module\n" | ||
| " (type $sum_t (func (param i32 i32) (result i32)))\n" | ||
| " (func $sum_f (type $sum_t) (param $x i32) (param $y i32) (result i32)\n" | ||
| " local.get $x\n" | ||
| " local.get $y\n" | ||
| " i32.add)\n" | ||
| " (export \"sum\" (func $sum_f)))"; | ||
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| wasm_byte_vec_t wat; | ||
| wasm_byte_vec_new(&wat, strlen(wat_string), wat_string); | ||
| wasm_byte_vec_t wasm_bytes; | ||
| wat2wasm(&wat, &wasm_bytes); | ||
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| printf("Creating the store...\n"); | ||
| wasm_engine_t* engine = wasm_engine_new(); | ||
| wasm_store_t* store = wasm_store_new(engine); | ||
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| printf("Compiling module...\n"); | ||
| wasm_module_t* module = wasm_module_new(store, &wasm_bytes); | ||
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| if (!module) { | ||
| printf("> Error compiling module!\n"); | ||
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| return 1; | ||
| } | ||
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| wasm_byte_vec_delete(&wasm_bytes); | ||
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| printf("Creating imports...\n"); | ||
| wasm_extern_vec_t import_object = WASM_EMPTY_VEC; | ||
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| printf("Instantiating module...\n"); | ||
| wasm_instance_t* instance = wasm_instance_new(store, module, &import_object, NULL); | ||
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| if (!instance) { | ||
| printf("> Error instantiating module!\n"); | ||
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| return 1; | ||
| } | ||
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| printf("Retrieving exports...\n"); | ||
| wasm_extern_vec_t exports; | ||
| wasm_instance_exports(instance, &exports); | ||
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| if (exports.size == 0) { | ||
| printf("> Error accessing exports!\n"); | ||
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| return 1; | ||
| } | ||
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| printf("Retrieving the `sum` function...\n"); | ||
| wasm_func_t* sum_func = wasm_extern_as_func(exports.data[0]); | ||
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| if (sum_func == NULL) { | ||
| printf("> Failed to get the `sum` function!\n"); | ||
|
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| return 1; | ||
| } | ||
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| printf("Calling `sum` function...\n"); | ||
| wasm_val_t args_val[2] = { WASM_I32_VAL(3), WASM_I32_VAL(4) }; | ||
| wasm_val_t results_val[1] = { WASM_INIT_VAL }; | ||
| wasm_val_vec_t args = WASM_ARRAY_VEC(args_val); | ||
| wasm_val_vec_t results = WASM_ARRAY_VEC(results_val); | ||
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| if (wasm_func_call(sum_func, &args, &results)) { | ||
| printf("> Error calling the `sum` function!\n"); | ||
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| return 1; | ||
| } | ||
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| printf("Results of `sum`: %d\n", results_val[0].of.i32); | ||
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| wasm_func_delete(sum_func); | ||
| wasm_module_delete(module); | ||
| wasm_instance_delete(instance); | ||
| wasm_store_delete(store); | ||
| wasm_engine_delete(engine); | ||
| } |
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