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