abe7f841ca
Backed out changeset 3e8d2c47138c (bug 1454816) Backed out changeset 80ff20241831 (bug 1454816) Backed out changeset 28c2d6d2a683 (bug 1454816) Backed out changeset 236943ab4142 (bug 1454816)
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "MemMapSnapshot.h"
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#include "mozilla/AutoMemMap.h"
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#include "mozilla/ResultExtensions.h"
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#include "mozilla/Try.h"
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#include "mozilla/ipc/FileDescriptor.h"
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namespace mozilla::ipc {
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Result<Ok, nsresult> MemMapSnapshot::Init(size_t aSize) {
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MOZ_ASSERT(!mInitialized);
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if (NS_WARN_IF(!mMem.CreateFreezeable(aSize))) {
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return Err(NS_ERROR_FAILURE);
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}
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if (NS_WARN_IF(!mMem.Map(aSize))) {
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return Err(NS_ERROR_FAILURE);
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}
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mInitialized = true;
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return Ok();
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}
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Result<Ok, nsresult> MemMapSnapshot::Finalize(loader::AutoMemMap& aMem) {
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MOZ_ASSERT(mInitialized);
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if (NS_WARN_IF(!mMem.Freeze())) {
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return Err(NS_ERROR_FAILURE);
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}
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// TakeHandle resets mMem, so call max_size first.
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size_t size = mMem.max_size();
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FileDescriptor memHandle(mMem.TakeHandle());
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MOZ_TRY(aMem.initWithHandle(memHandle, size));
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mInitialized = false;
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return Ok();
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}
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} // namespace mozilla::ipc
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