1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/mac/scoped_mach_vm.h" 6 7 namespace base { 8 namespace mac { 9 10 void ScopedMachVM::reset(vm_address_t address, vm_size_t size) { 11 DCHECK(address % PAGE_SIZE == 0); 12 DCHECK(size % PAGE_SIZE == 0); 13 14 if (size_) { 15 if (address_ < address) { 16 vm_deallocate(mach_task_self(), 17 address_, 18 std::min(size_, address - address_)); 19 } 20 if (address_ + size_ > address + size) { 21 vm_address_t deallocate_start = std::max(address_, address + size); 22 vm_deallocate(mach_task_self(), 23 deallocate_start, 24 address_ + size_ - deallocate_start); 25 } 26 } 27 28 address_ = address; 29 size_ = size; 30 } 31 32 } // namespace mac 33 } // namespace base 34
