src/third_party/WebKit/Source/WTF/wtf/ThreadIdentifierDataStarboard.cpp

/*
 * Copyright (C) 2009, 2011 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

#include "config.h"

#if OS(STARBOARD)

#include "ThreadIdentifierDataStarboard.h"
#include "Threading.h"
#include "starboard/thread.h"

namespace WTF {

std::map<ThreadIdentifier, ThreadIdentifierData*> ThreadIdentifierData::local_handle;
Mutex ThreadIdentifierData::lock_local_handle;

SbThreadLocalKey ThreadIdentifierData::m_key = kSbThreadLocalKeyInvalid;

void threadDidExit(ThreadIdentifier);

ThreadIdentifierData::~ThreadIdentifierData()
{
    threadDidExit(m_identifier);
}

void ThreadIdentifierData::initializeOnce()
{
    m_key = SbThreadCreateLocalKey(destruct);
    if (!SbThreadIsValidLocalKey(m_key))
        CRASH();
}

ThreadIdentifier ThreadIdentifierData::identifier()
{
    ASSERT(SbThreadIsValidLocalKey(m_key));
    ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(SbThreadGetLocalValue(m_key));

    return threadIdentifierData ? threadIdentifierData->m_identifier : 0;
}

void ThreadIdentifierData::initialize(ThreadIdentifier id)
{
    ASSERT(!identifier());
    ThreadIdentifierData *created = new ThreadIdentifierData(id);
    SbThreadSetLocalValue(m_key, created);
    {
      MutexLocker m(lock_local_handle);
      ASSERT(local_handle.find(id) == local_handle.end());
      local_handle.insert(std::make_pair(id, created));
    }
}

void ThreadIdentifierData::destruct(void* data)
{
    ThreadIdentifierData* threadIdentifierData = static_cast<ThreadIdentifierData*>(data);
    ASSERT(threadIdentifierData);

    if (threadIdentifierData->m_isDestroyedOnce) {
        delete threadIdentifierData;
        return;
    }

    threadIdentifierData->m_isDestroyedOnce = true;
    // Re-setting the value for key causes another destruct() call after all other thread-specific destructors were called.
    SbThreadSetLocalValue(m_key, threadIdentifierData);
}

} // namespace WTF

#endif // USE(PTHREADS)