updated vm

- updated func/fift
- additional checks in block validator
- docs
- tunnel prototype in ADNL

crypto/common/linalloc.hpp

@@ -0,0 +1,50 @@
+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2020 Telegram Systems LLP
+*/
+namespace td {
+
+class LinearAllocator {
+  std::size_t size;
+  char *ptr, *cur, *end;
+
+ public:
+  LinearAllocator(std::size_t _size) : size(_size) {
+    cur = ptr = (char*)malloc(size);
+    if (!ptr) {
+      throw std::bad_alloc();
+    }
+    end = ptr + size;
+  }
+  ~LinearAllocator() {
+    free(ptr);
+  }
+  void* allocate(std::size_t count) {
+    char* t = cur;
+    cur += (count + 7) & -8;
+    if (cur > end) {
+      throw std::bad_alloc();
+    }
+    return (void*)t;
+  }
+};
+
+}  // namespace td
+
+inline void* operator new(std::size_t count, td::LinearAllocator& alloc) {
+  return alloc.allocate(count);
+}