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| 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_EQ(address % PAGE_SIZE, 0u); | |
| 12 DCHECK_EQ(size % PAGE_SIZE, 0u); | |
| 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 | |
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