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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /dom/plugins/ipc/MiniShmParent.cpp | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/plugins/ipc/MiniShmParent.cpp')
-rw-r--r-- | dom/plugins/ipc/MiniShmParent.cpp | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/dom/plugins/ipc/MiniShmParent.cpp b/dom/plugins/ipc/MiniShmParent.cpp new file mode 100644 index 000000000..eb0b16c8a --- /dev/null +++ b/dom/plugins/ipc/MiniShmParent.cpp @@ -0,0 +1,218 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=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 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "MiniShmParent.h" + +#include "base/scoped_handle.h" + +#include <sstream> + +namespace mozilla { +namespace plugins { + +// static +const unsigned int MiniShmParent::kDefaultMiniShmSectionSize = 0x1000; + +MiniShmParent::MiniShmParent() + : mSectionSize(0), + mParentEvent(nullptr), + mParentGuard(nullptr), + mChildEvent(nullptr), + mChildGuard(nullptr), + mRegWait(nullptr), + mFileMapping(nullptr), + mView(nullptr), + mIsConnected(false), + mTimeout(INFINITE) +{ +} + +MiniShmParent::~MiniShmParent() +{ + CleanUp(); +} + +void +MiniShmParent::CleanUp() +{ + if (mRegWait) { + ::UnregisterWaitEx(mRegWait, INVALID_HANDLE_VALUE); + mRegWait = nullptr; + } + if (mParentEvent) { + ::CloseHandle(mParentEvent); + mParentEvent = nullptr; + } + if (mParentGuard) { + ::CloseHandle(mParentGuard); + mParentGuard = nullptr; + } + if (mChildEvent) { + ::CloseHandle(mChildEvent); + mChildEvent = nullptr; + } + if (mChildGuard) { + ::CloseHandle(mChildGuard); + mChildGuard = nullptr; + } + if (mView) { + ::UnmapViewOfFile(mView); + mView = nullptr; + } + if (mFileMapping) { + ::CloseHandle(mFileMapping); + mFileMapping = nullptr; + } +} + +nsresult +MiniShmParent::Init(MiniShmObserver* aObserver, const DWORD aTimeout, + const unsigned int aSectionSize) +{ + if (!aObserver || !aSectionSize || (aSectionSize % 0x1000) || !aTimeout) { + return NS_ERROR_ILLEGAL_VALUE; + } + if (mFileMapping) { + return NS_ERROR_ALREADY_INITIALIZED; + } + SECURITY_ATTRIBUTES securityAttributes = {sizeof(securityAttributes), + nullptr, + TRUE}; + ScopedHandle parentEvent(::CreateEvent(&securityAttributes, + FALSE, + FALSE, + nullptr)); + if (!parentEvent.IsValid()) { + return NS_ERROR_FAILURE; + } + ScopedHandle parentGuard(::CreateEvent(&securityAttributes, + FALSE, + TRUE, + nullptr)); + if (!parentGuard.IsValid()) { + return NS_ERROR_FAILURE; + } + ScopedHandle childEvent(::CreateEvent(&securityAttributes, + FALSE, + FALSE, + nullptr)); + if (!childEvent.IsValid()) { + return NS_ERROR_FAILURE; + } + ScopedHandle childGuard(::CreateEvent(&securityAttributes, + FALSE, + TRUE, + nullptr)); + if (!childGuard.IsValid()) { + return NS_ERROR_FAILURE; + } + ScopedHandle mapping(::CreateFileMapping(INVALID_HANDLE_VALUE, + &securityAttributes, + PAGE_READWRITE, + 0, + aSectionSize, + nullptr)); + if (!mapping.IsValid()) { + return NS_ERROR_FAILURE; + } + ScopedMappedFileView view(::MapViewOfFile(mapping, + FILE_MAP_WRITE, + 0, 0, 0)); + if (!view.IsValid()) { + return NS_ERROR_FAILURE; + } + nsresult rv = SetView(view, aSectionSize, false); + NS_ENSURE_SUCCESS(rv, rv); + rv = SetGuard(childGuard, aTimeout); + NS_ENSURE_SUCCESS(rv, rv); + + MiniShmInit* initStruct = nullptr; + rv = GetWritePtrInternal(initStruct); + NS_ENSURE_SUCCESS(rv, rv); + initStruct->mParentEvent = parentEvent; + initStruct->mParentGuard = parentGuard; + initStruct->mChildEvent = childEvent; + initStruct->mChildGuard = childGuard; + + if (!::RegisterWaitForSingleObject(&mRegWait, + parentEvent, + &SOnEvent, + this, + INFINITE, + WT_EXECUTEDEFAULT)) { + return NS_ERROR_FAILURE; + } + + mParentEvent = parentEvent.Take(); + mParentGuard = parentGuard.Take(); + mChildEvent = childEvent.Take(); + mChildGuard = childGuard.Take(); + mFileMapping = mapping.Take(); + mView = view.Take(); + mSectionSize = aSectionSize; + SetObserver(aObserver); + mTimeout = aTimeout; + return NS_OK; +} + +nsresult +MiniShmParent::GetCookie(std::wstring& cookie) +{ + if (!mFileMapping) { + return NS_ERROR_NOT_INITIALIZED; + } + std::wostringstream oss; + oss << mFileMapping; + if (!oss) { + return NS_ERROR_FAILURE; + } + cookie = oss.str(); + return NS_OK; +} + +nsresult +MiniShmParent::Send() +{ + if (!mChildEvent) { + return NS_ERROR_NOT_INITIALIZED; + } + if (!::SetEvent(mChildEvent)) { + return NS_ERROR_FAILURE; + } + return NS_OK; +} + +bool +MiniShmParent::IsConnected() const +{ + return mIsConnected; +} + +void +MiniShmParent::OnEvent() +{ + if (mIsConnected) { + MiniShmBase::OnEvent(); + } else { + FinalizeConnection(); + } + ::SetEvent(mParentGuard); +} + +void +MiniShmParent::FinalizeConnection() +{ + const MiniShmInitComplete* initCompleteStruct = nullptr; + nsresult rv = GetReadPtr(initCompleteStruct); + mIsConnected = NS_SUCCEEDED(rv) && initCompleteStruct->mSucceeded; + if (mIsConnected) { + OnConnect(); + } +} + +} // namespace plugins +} // namespace mozilla + |