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52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Principal.h"
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#include "jsapi.h"
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#include "mozilla/Assertions.h"
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BEGIN_WORKERS_NAMESPACE
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struct WorkerPrincipal final : public JSPrincipals
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{
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bool write(JSContext* aCx, JSStructuredCloneWriter* aWriter) override {
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MOZ_CRASH("WorkerPrincipal::write not implemented");
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return false;
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}
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};
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JSPrincipals*
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GetWorkerPrincipal()
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{
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static WorkerPrincipal sPrincipal;
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/*
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* To make sure the the principals refcount is initialized to one, atomically
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* increment it on every pass though this function. If we discover this wasn't
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* the first time, decrement it again. This avoids the need for
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* synchronization.
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*/
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int32_t prevRefcount = sPrincipal.refcount++;
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if (prevRefcount > 0) {
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--sPrincipal.refcount;
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} else {
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#ifdef DEBUG
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sPrincipal.debugToken = kJSPrincipalsDebugToken;
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#endif
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}
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return &sPrincipal;
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}
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void
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DestroyWorkerPrincipals(JSPrincipals* aPrincipals)
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{
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MOZ_ASSERT_UNREACHABLE("Worker principals refcount should never fall below one");
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}
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END_WORKERS_NAMESPACE
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