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-rw-r--r--xpcom/base/nsISupportsImpl.cpp144
1 files changed, 144 insertions, 0 deletions
diff --git a/xpcom/base/nsISupportsImpl.cpp b/xpcom/base/nsISupportsImpl.cpp
new file mode 100644
index 0000000000..c282ec14db
--- /dev/null
+++ b/xpcom/base/nsISupportsImpl.cpp
@@ -0,0 +1,144 @@
+/* -*- 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 "nsISupportsImpl.h"
+
+#include "mozilla/Assertions.h"
+#ifndef XPCOM_GLUE_AVOID_NSPR
+# include "nsPrintfCString.h"
+# include "nsThreadUtils.h"
+#endif
+
+using namespace mozilla;
+
+nsresult NS_FASTCALL NS_TableDrivenQI(void* aThis, REFNSIID aIID,
+ void** aInstancePtr,
+ const QITableEntry* aEntries) {
+ do {
+ if (aIID.Equals(*aEntries->iid)) {
+ nsISupports* r = reinterpret_cast<nsISupports*>(
+ reinterpret_cast<char*>(aThis) + aEntries->offset);
+ NS_ADDREF(r);
+ *aInstancePtr = r;
+ return NS_OK;
+ }
+
+ ++aEntries;
+ } while (aEntries->iid);
+
+ *aInstancePtr = nullptr;
+ return NS_ERROR_NO_INTERFACE;
+}
+
+#ifndef XPCOM_GLUE_AVOID_NSPR
+# ifdef MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
+nsAutoOwningThread::nsAutoOwningThread() : mThread(PR_GetCurrentThread()) {}
+
+void nsAutoOwningThread::AssertCurrentThreadOwnsMe(const char* msg) const {
+ if (MOZ_UNLIKELY(!IsCurrentThread())) {
+ // `msg` is a string literal by construction.
+ MOZ_CRASH_UNSAFE(msg);
+ }
+}
+
+bool nsAutoOwningThread::IsCurrentThread() const {
+ return mThread == PR_GetCurrentThread();
+}
+
+nsAutoOwningEventTarget::nsAutoOwningEventTarget()
+ : mTarget(GetCurrentSerialEventTarget()) {
+ mTarget->AddRef();
+}
+
+nsAutoOwningEventTarget::~nsAutoOwningEventTarget() {
+ nsCOMPtr<nsISerialEventTarget> target = dont_AddRef(mTarget);
+}
+
+void nsAutoOwningEventTarget ::AssertCurrentThreadOwnsMe(
+ const char* msg) const {
+ if (MOZ_UNLIKELY(!IsCurrentThread())) {
+ // `msg` is a string literal by construction.
+ MOZ_CRASH_UNSAFE(msg);
+ }
+}
+
+bool nsAutoOwningEventTarget::IsCurrentThread() const {
+ return mTarget->IsOnCurrentThread();
+}
+
+# endif
+
+namespace mozilla::detail {
+class ProxyDeleteVoidRunnable final : public CancelableRunnable {
+ public:
+ ProxyDeleteVoidRunnable(const char* aName, void* aPtr,
+ DeleteVoidFunction* aDeleteFunc)
+ : CancelableRunnable(aName), mPtr(aPtr), mDeleteFunc(aDeleteFunc) {}
+
+ NS_IMETHOD Run() override {
+ if (mPtr) {
+ mDeleteFunc(mPtr);
+ mPtr = nullptr;
+ }
+ return NS_OK;
+ }
+
+ // Mimics the behaviour in `ProxyRelease`, freeing the resource when
+ // cancelled.
+ nsresult Cancel() override { return Run(); }
+
+# ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
+ NS_IMETHOD GetName(nsACString& aName) override {
+ if (mName) {
+ aName.Append(mName);
+ } else {
+ aName.AssignLiteral("ProxyDeleteVoidRunnable");
+ }
+ return NS_OK;
+ }
+# endif
+
+ private:
+ ~ProxyDeleteVoidRunnable() {
+ if (mPtr) {
+# ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
+ NS_WARNING(
+ nsPrintfCString(
+ "ProxyDeleteVoidRunnable for '%s' never run, leaking!", mName)
+ .get());
+# else
+ NS_WARNING("ProxyDeleteVoidRunnable never run, leaking!");
+# endif
+ }
+ }
+
+ void* mPtr;
+ DeleteVoidFunction* mDeleteFunc;
+};
+
+void ProxyDeleteVoid(const char* aName, nsISerialEventTarget* aTarget,
+ void* aPtr, DeleteVoidFunction* aDeleteFunc) {
+ MOZ_ASSERT(aName);
+ MOZ_ASSERT(aPtr);
+ MOZ_ASSERT(aDeleteFunc);
+ if (!aTarget) {
+ NS_WARNING(nsPrintfCString("no target for '%s', leaking!", aName).get());
+ return;
+ }
+
+ if (aTarget->IsOnCurrentThread()) {
+ aDeleteFunc(aPtr);
+ return;
+ }
+ nsresult rv = aTarget->Dispatch(
+ MakeAndAddRef<ProxyDeleteVoidRunnable>(aName, aPtr, aDeleteFunc),
+ NS_DISPATCH_NORMAL);
+ if (NS_FAILED(rv)) {
+ NS_WARNING(nsPrintfCString("failed to post '%s', leaking!", aName).get());
+ }
+}
+} // namespace mozilla::detail
+#endif