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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /ipc/glue/CrossProcessSemaphore_windows.cpp
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'ipc/glue/CrossProcessSemaphore_windows.cpp')
-rw-r--r--ipc/glue/CrossProcessSemaphore_windows.cpp83
1 files changed, 83 insertions, 0 deletions
diff --git a/ipc/glue/CrossProcessSemaphore_windows.cpp b/ipc/glue/CrossProcessSemaphore_windows.cpp
new file mode 100644
index 0000000000..70644b7d51
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+++ b/ipc/glue/CrossProcessSemaphore_windows.cpp
@@ -0,0 +1,83 @@
+/* -*- 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 "CrossProcessSemaphore.h"
+#include "nsDebug.h"
+#include "nsISupportsImpl.h"
+#include "ProtocolUtils.h"
+
+using base::GetCurrentProcessHandle;
+using base::ProcessHandle;
+
+namespace mozilla {
+
+/* static */
+CrossProcessSemaphore* CrossProcessSemaphore::Create(const char*,
+ uint32_t aInitialValue) {
+ // 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.
+ HANDLE semaphore =
+ ::CreateSemaphoreA(nullptr, aInitialValue, 0x7fffffff, nullptr);
+ if (!semaphore) {
+ return nullptr;
+ }
+ return new CrossProcessSemaphore(semaphore);
+}
+
+/* static */
+CrossProcessSemaphore* CrossProcessSemaphore::Create(
+ CrossProcessSemaphoreHandle aHandle) {
+ DWORD flags;
+ if (!::GetHandleInformation(aHandle.get(), &flags)) {
+ return nullptr;
+ }
+
+ return new CrossProcessSemaphore(aHandle.release());
+}
+
+CrossProcessSemaphore::CrossProcessSemaphore(HANDLE aSemaphore)
+ : mSemaphore(aSemaphore) {
+ MOZ_COUNT_CTOR(CrossProcessSemaphore);
+}
+
+CrossProcessSemaphore::~CrossProcessSemaphore() {
+ MOZ_ASSERT(mSemaphore, "Improper construction of semaphore or double free.");
+ ::CloseHandle(mSemaphore);
+ MOZ_COUNT_DTOR(CrossProcessSemaphore);
+}
+
+bool CrossProcessSemaphore::Wait(const Maybe<TimeDuration>& aWaitTime) {
+ MOZ_ASSERT(mSemaphore, "Improper construction of semaphore.");
+ HRESULT hr = ::WaitForSingleObject(
+ mSemaphore, aWaitTime.isSome() ? aWaitTime->ToMilliseconds() : INFINITE);
+ return hr == WAIT_OBJECT_0;
+}
+
+void CrossProcessSemaphore::Signal() {
+ MOZ_ASSERT(mSemaphore, "Improper construction of semaphore.");
+ ::ReleaseSemaphore(mSemaphore, 1, nullptr);
+}
+
+CrossProcessSemaphoreHandle CrossProcessSemaphore::CloneHandle() {
+ HANDLE newHandle;
+ bool succeeded =
+ ::DuplicateHandle(GetCurrentProcess(), mSemaphore, GetCurrentProcess(),
+ &newHandle, 0, false, DUPLICATE_SAME_ACCESS);
+
+ if (!succeeded) {
+ return nullptr;
+ }
+
+ return UniqueFileHandle(newHandle);
+}
+
+void CrossProcessSemaphore::CloseHandle() {}
+
+} // namespace mozilla