// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/mac/scoped_mach_vm.h"
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namespace base {
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namespace mac {
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void ScopedMachVM::reset(vm_address_t address, vm_size_t size) {
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DCHECK(address % PAGE_SIZE == 0);
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DCHECK(size % PAGE_SIZE == 0);
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if (size_) {
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if (address_ < address) {
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vm_deallocate(mach_task_self(),
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address_,
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std::min(size_, address - address_));
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}
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if (address_ + size_ > address + size) {
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vm_address_t deallocate_start = std::max(address_, address + size);
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vm_deallocate(mach_task_self(),
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deallocate_start,
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address_ + size_ - deallocate_start);
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}
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}
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address_ = address;
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size_ = size;
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}
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} // namespace mac
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} // namespace base
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