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