blob: af12b227d3577cb4a2305e6c7041cabd87830b39 [file] [log] [blame]
/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmContext.h"
#if ENABLE(WEBASSEMBLY)
#include "Options.h"
#include "WasmInstance.h"
#include <mutex>
#include <wtf/FastTLS.h>
namespace JSC { namespace Wasm {
bool Context::useFastTLS()
{
#if ENABLE(FAST_TLS_JIT)
return Options::useFastTLSForWasmContext();
#else
return false;
#endif
}
Instance* Context::load() const
{
#if ENABLE(FAST_TLS_JIT)
if (useFastTLS())
return bitwise_cast<Instance*>(_pthread_getspecific_direct(WTF_WASM_CONTEXT_KEY));
#endif
return instance;
}
void Context::store(Instance* inst, void* softStackLimit)
{
#if ENABLE(FAST_TLS_JIT)
if (useFastTLS())
_pthread_setspecific_direct(WTF_WASM_CONTEXT_KEY, bitwise_cast<void*>(inst));
#endif
instance = inst;
if (instance)
instance->setCachedStackLimit(softStackLimit);
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)