Add fuel related functions to c-api (#2643)

Co-authored-by: Shu <me@wadza.fr>

crates/c-api/src/config.rs

@@ -55,6 +55,11 @@ pub extern "C" fn wasmtime_config_interruptable_set(c: &mut wasm_config_t, enabl
     c.config.interruptable(enable);
 }
 
+#[no_mangle]
+pub extern "C" fn wasmtime_config_consume_fuel_set(c: &mut wasm_config_t, enable: bool) {
+    c.config.consume_fuel(enable);
+}
+
 #[no_mangle]
 pub extern "C" fn wasmtime_config_max_wasm_stack_set(c: &mut wasm_config_t, size: usize) {
     c.config.max_wasm_stack(size);

crates/c-api/src/store.rs

@@ -42,3 +42,13 @@ pub extern "C" fn wasmtime_interrupt_handle_new(
 pub extern "C" fn wasmtime_interrupt_handle_interrupt(handle: &wasmtime_interrupt_handle_t) {
     handle.handle.interrupt();
 }
+
+#[no_mangle]
+pub extern "C" fn wasmtime_add_fuel(store: &wasm_store_t, fuel: u64) {
+    store.store.add_fuel(fuel);
+}
+
+#[no_mangle]
+pub extern "C" fn wasmtime_fuel_consumed(store: &wasm_store_t) -> u64 {
+    store.store.fuel_consumed().unwrap_or(0)
+}