15d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 25d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)// found in the LICENSE file. 45d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 5e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch#include "mojo/public/cpp/bindings/lib/fixed_buffer.h" 65d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 75d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include <stdlib.h> 85d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 95d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include <algorithm> 105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 11e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch#include "mojo/public/cpp/bindings/lib/bindings_serialization.h" 125f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles)#include "mojo/public/cpp/environment/logging.h" 135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace mojo { 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)namespace internal { 165d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 175d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)FixedBuffer::FixedBuffer(size_t size) 185d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) : ptr_(NULL), 195d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) cursor_(0), 205d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size_(internal::Align(size)) { 21c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch // calloc() required to zero memory and thus avoid info leaks. 225d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) ptr_ = static_cast<char*>(calloc(size_, 1)); 235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 245d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 255d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)FixedBuffer::~FixedBuffer() { 265d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) free(ptr_); 275d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 29cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void* FixedBuffer::Allocate(size_t delta) { 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) delta = internal::Align(delta); 315d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 32effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (delta == 0 || delta > size_ - cursor_) { 335f1c94371a64b3196d4be9466099bb892df9b88eTorne (Richard Coles) MOJO_DCHECK(false) << "Not reached"; 345d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return NULL; 35effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 365d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) char* result = ptr_ + cursor_; 385d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) cursor_ += delta; 395d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 405d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return result; 415d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 425d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 435d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)void* FixedBuffer::Leak() { 445d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) char* ptr = ptr_; 455d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) ptr_ = NULL; 465d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) cursor_ = 0; 475d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size_ = 0; 485d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) return ptr; 495d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} 505d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 515d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} // namespace internal 525d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)} // namespace mojo 53