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9a41450b28
Despite the comment saying not to use the "handle" except as an opaque identifier, it is being used to pass the handle to other OS APIs. Direct access to the handle needs to be controlled to make sure freezing is safe, so this patch replaces that with interfaces that are more explicit about ownership and lifetime. Depends on D26739 Differential Revision: https://phabricator.services.mozilla.com/D26740 --HG-- extra : moz-landing-system : lando
56 lines
1.3 KiB
C++
56 lines
1.3 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 "SharedDIB.h"
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namespace mozilla {
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namespace gfx {
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SharedDIB::SharedDIB() : mShMem(nullptr) {}
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SharedDIB::~SharedDIB() { Close(); }
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nsresult SharedDIB::Create(uint32_t aSize) {
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Close();
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mShMem = new base::SharedMemory();
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if (!mShMem || !mShMem->Create(aSize)) return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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bool SharedDIB::IsValid() { return mShMem && mShMem->IsValid(); }
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nsresult SharedDIB::Close() {
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delete mShMem;
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mShMem = nullptr;
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return NS_OK;
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}
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nsresult SharedDIB::Attach(Handle aHandle, uint32_t aSize) {
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Close();
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mShMem = new base::SharedMemory(aHandle, false);
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if (!mShMem) return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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nsresult SharedDIB::ShareToProcess(base::ProcessId aTargetPid,
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Handle* aNewHandle) {
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if (!mShMem) return NS_ERROR_UNEXPECTED;
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if (!mShMem->ShareToProcess(aTargetPid, aNewHandle))
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return NS_ERROR_UNEXPECTED;
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return NS_OK;
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}
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} // namespace gfx
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} // namespace mozilla
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