introduce ipfs service

examples/ipfs_node/wasm/ipfs_rpc/src/mem.rs

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use crate::log_utf8_string;
+use std::alloc::{alloc as global_alloc, dealloc as global_dealloc, Layout};
+use std::ptr::NonNull;
+
+/// Allocates memory area of specified size and returns its address.
+#[no_mangle]
+pub unsafe fn allocate(size: usize) -> NonNull<u8> {
+    let layout: Layout = Layout::from_size_align(size, std::mem::align_of::<u8>()).unwrap();
+
+    let msg = format!("wasm_rpc: calling allocate with {}\n", size);
+    log_utf8_string(msg.as_ptr() as _, msg.len() as _);
+
+    NonNull::new_unchecked(global_alloc(layout))
+}
+
+/// Deallocates memory area for provided memory pointer and size.
+#[no_mangle]
+pub unsafe fn deallocate(ptr: NonNull<u8>, size: usize) {
+    let layout = Layout::from_size_align(size, std::mem::align_of::<u8>()).unwrap();
+
+    let msg = format!("wasm_rpc: calling deallocate with {:?} {}\n", ptr, size);
+    log_utf8_string(msg.as_ptr() as _, msg.len() as _);
+
+    global_dealloc(ptr.as_ptr(), layout);
+}