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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /ipc/glue/CrossProcessMutex_windows.cpp
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--ipc/glue/CrossProcessMutex_windows.cpp65
1 files changed, 65 insertions, 0 deletions
diff --git a/ipc/glue/CrossProcessMutex_windows.cpp b/ipc/glue/CrossProcessMutex_windows.cpp
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index 0000000000..d4bbe2f2ba
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+++ b/ipc/glue/CrossProcessMutex_windows.cpp
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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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <windows.h>
+
+#include "base/process_util.h"
+#include "CrossProcessMutex.h"
+#include "nsDebug.h"
+#include "nsISupportsImpl.h"
+#include "ProtocolUtils.h"
+
+using base::GetCurrentProcessHandle;
+using base::ProcessHandle;
+
+namespace mozilla {
+
+CrossProcessMutex::CrossProcessMutex(const char*) {
+ // We explicitly share this using DuplicateHandle, we do -not- want this to
+ // be inherited by child processes by default! So no security attributes are
+ // given.
+ mMutex = ::CreateMutexA(nullptr, FALSE, nullptr);
+ if (!mMutex) {
+ MOZ_CRASH("This shouldn't happen - failed to create mutex!");
+ }
+ MOZ_COUNT_CTOR(CrossProcessMutex);
+}
+
+CrossProcessMutex::CrossProcessMutex(CrossProcessMutexHandle aHandle) {
+ DWORD flags;
+ if (!::GetHandleInformation(aHandle.get(), &flags)) {
+ MOZ_CRASH("Attempt to construct a mutex from an invalid handle!");
+ }
+ mMutex = aHandle.release();
+ MOZ_COUNT_CTOR(CrossProcessMutex);
+}
+
+CrossProcessMutex::~CrossProcessMutex() {
+ NS_ASSERTION(mMutex, "Improper construction of mutex or double free.");
+ ::CloseHandle(mMutex);
+ MOZ_COUNT_DTOR(CrossProcessMutex);
+}
+
+void CrossProcessMutex::Lock() {
+ NS_ASSERTION(mMutex, "Improper construction of mutex.");
+ ::WaitForSingleObject(mMutex, INFINITE);
+}
+
+void CrossProcessMutex::Unlock() {
+ NS_ASSERTION(mMutex, "Improper construction of mutex.");
+ ::ReleaseMutex(mMutex);
+}
+
+CrossProcessMutexHandle CrossProcessMutex::CloneHandle() {
+ HANDLE newHandle;
+ if (!::DuplicateHandle(GetCurrentProcess(), mMutex, GetCurrentProcess(),
+ &newHandle, 0, false, DUPLICATE_SAME_ACCESS)) {
+ return nullptr;
+ }
+ return mozilla::UniqueFileHandle(newHandle);
+}
+
+} // namespace mozilla