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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "Principal.h"
#include "jsapi.h"
#include "mozilla/Assertions.h"
BEGIN_WORKERS_NAMESPACE
struct WorkerPrincipal final : public JSPrincipals
{
bool write(JSContext* aCx, JSStructuredCloneWriter* aWriter) override {
MOZ_CRASH("WorkerPrincipal::write not implemented");
return false;
}
};
JSPrincipals*
GetWorkerPrincipal()
{
static WorkerPrincipal sPrincipal;
/*
* To make sure the the principals refcount is initialized to one, atomically
* increment it on every pass though this function. If we discover this wasn't
* the first time, decrement it again. This avoids the need for
* synchronization.
*/
int32_t prevRefcount = sPrincipal.refcount++;
if (prevRefcount > 0) {
--sPrincipal.refcount;
} else {
#ifdef DEBUG
sPrincipal.debugToken = kJSPrincipalsDebugToken;
#endif
}
return &sPrincipal;
}
void
DestroyWorkerPrincipals(JSPrincipals* aPrincipals)
{
MOZ_ASSERT_UNREACHABLE("Worker principals refcount should never fall below one");
}
END_WORKERS_NAMESPACE
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