2406ce261c
Backed out changeset 8d9053f1c203 (bug 1942129) Backed out changeset 393e3c507c27 (bug 1942129) Backed out changeset 8240d353d224 (bug 1942129) Backed out changeset 8c4cd026b720 (bug 1942129) Backed out changeset 742634b0d6e9 (bug 1942129) Backed out changeset d16857f9812f (bug 1942129) Backed out changeset 7ff7af041ee7 (bug 1942129) Backed out changeset ef41d9e4c7de (bug 1942129)
47 lines
1.1 KiB
C++
47 lines
1.1 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/ResultExtensions.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(!mMem);
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auto aMem = MakeRefPtr<SharedMemory>();
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if (NS_WARN_IF(!aMem->CreateFreezable(aSize))) {
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return Err(NS_ERROR_FAILURE);
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}
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if (NS_WARN_IF(!aMem->Map(aSize))) {
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return Err(NS_ERROR_FAILURE);
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}
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mMem = std::move(aMem);
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return Ok();
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}
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Result<Ok, nsresult> MemMapSnapshot::Finalize(RefPtr<SharedMemory>& aMem) {
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MOZ_ASSERT(mMem);
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auto size = mMem->Size();
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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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aMem = std::move(mMem);
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// We need to re-map the memory as `Freeze()` unmaps it.
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if (NS_WARN_IF(!aMem->Map(size))) {
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return Err(NS_ERROR_FAILURE);
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}
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return Ok();
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}
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} // namespace mozilla::ipc
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