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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "MemMapSnapshot.h"
#include "nsDebug.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/ipc/SharedMemoryHandle.h"
namespace mozilla::ipc {
Result<Ok, nsresult> MemMapSnapshot::Init(size_t aSize) {
MOZ_ASSERT(!mMem);
auto handle = shared_memory::CreateFreezable(aSize);
if (NS_WARN_IF(!handle)) {
return Err(NS_ERROR_FAILURE);
}
auto mem = std::move(handle).Map();
if (NS_WARN_IF(!mem)) {
return Err(NS_ERROR_FAILURE);
}
mMem = std::move(mem);
return Ok();
}
Result<ReadOnlySharedMemoryHandle, nsresult> MemMapSnapshot::Finalize() {
MOZ_ASSERT(mMem);
auto readOnlyHandle = std::move(mMem).Freeze();
if (NS_WARN_IF(!readOnlyHandle)) {
return Err(NS_ERROR_FAILURE);
}
return std::move(readOnlyHandle);
}
} // namespace mozilla::ipc