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-rw-r--r--security/manager/ssl/CryptoTask.cpp95
1 files changed, 95 insertions, 0 deletions
diff --git a/security/manager/ssl/CryptoTask.cpp b/security/manager/ssl/CryptoTask.cpp
new file mode 100644
index 000000000..71b8ac88d
--- /dev/null
+++ b/security/manager/ssl/CryptoTask.cpp
@@ -0,0 +1,95 @@
+/* -*- 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 "CryptoTask.h"
+#include "nsNSSComponent.h"
+
+namespace mozilla {
+
+CryptoTask::~CryptoTask()
+{
+ MOZ_ASSERT(mReleasedNSSResources);
+
+ nsNSSShutDownPreventionLock lock;
+ if (!isAlreadyShutDown()) {
+ shutdown(ShutdownCalledFrom::Object);
+ }
+}
+
+nsresult
+CryptoTask::Dispatch(const nsACString& taskThreadName)
+{
+ MOZ_ASSERT(taskThreadName.Length() <= 15);
+
+ // Ensure that NSS is initialized, since presumably CalculateResult
+ // will use NSS functions
+ if (!EnsureNSSInitializedChromeOrContent()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // Can't add 'this' as the event to run, since mThread may not be set yet
+ nsresult rv = NS_NewThread(getter_AddRefs(mThread), nullptr,
+ nsIThreadManager::DEFAULT_STACK_SIZE);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ NS_SetThreadName(mThread, taskThreadName);
+ // Note: event must not null out mThread!
+ return mThread->Dispatch(this, NS_DISPATCH_NORMAL);
+}
+
+NS_IMETHODIMP
+CryptoTask::Run()
+{
+ if (!NS_IsMainThread()) {
+ nsNSSShutDownPreventionLock locker;
+ if (isAlreadyShutDown()) {
+ mRv = NS_ERROR_NOT_AVAILABLE;
+ } else {
+ mRv = CalculateResult();
+ }
+ NS_DispatchToMainThread(this);
+ } else {
+ // back on the main thread
+
+ // call ReleaseNSSResources now, before calling CallCallback, so that
+ // CryptoTasks have consistent behavior regardless of whether NSS is shut
+ // down between CalculateResult being called and CallCallback being called.
+ if (!mReleasedNSSResources) {
+ mReleasedNSSResources = true;
+ ReleaseNSSResources();
+ }
+
+ CallCallback(mRv);
+
+ // Not all uses of CryptoTask use a transient thread
+ if (mThread) {
+ // Don't leak threads!
+ mThread->Shutdown(); // can't Shutdown from the thread itself, darn
+ // Don't null out mThread!
+ // See bug 999104. We must hold a ref to the thread across Dispatch()
+ // since the internal mThread ref could be released while processing
+ // the Dispatch(), and Dispatch/PutEvent itself doesn't hold a ref; it
+ // assumes the caller does.
+ }
+ }
+
+ return NS_OK;
+}
+
+void
+CryptoTask::virtualDestroyNSSReference()
+{
+ MOZ_ASSERT(NS_IsMainThread(),
+ "virtualDestroyNSSReference called off the main thread");
+ if (!mReleasedNSSResources) {
+ mReleasedNSSResources = true;
+ ReleaseNSSResources();
+ }
+}
+
+} // namespace mozilla