text: /*
     +----------------------------------------------------------------------+
     | HipHop for PHP                                                       |
     +----------------------------------------------------------------------+
     | Copyright (c) 2010-2013 Facebook, Inc. (http://www.facebook.com)     |
     | Copyright (c) 1997-2010 The PHP Group                                |
     +----------------------------------------------------------------------+
     | This source file is subject to version 3.01 of the PHP license,      |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.php.net/license/3_01.txt                                  |
     | If you did not receive a copy of the PHP license and are unable to   |
     | obtain it through the world-wide-web, please send a note to          |
     | license@php.net so we can mail you a copy immediately.               |
     +----------------------------------------------------------------------+
  */
  
  #include "hphp/runtime/ext/ext_closure.h"
  #include "hphp/runtime/base/builtin-functions.h"
  #include "hphp/runtime/vm/jit/translator-inline.h"
  
  namespace HPHP {
  ///////////////////////////////////////////////////////////////////////////////
  
  c_Closure::~c_Closure() {
    // same as ar->hasThis()
    if (m_thisOrClass && !(intptr_t(m_thisOrClass) & 1LL)) {
      decRefObj(m_thisOrClass);
    }
  }
  
  void c_Closure::t___construct() {
    raise_error("Can't create a Closure directly");
  }
  
  const StaticString s_uuinvoke("__invoke");
  
  void c_Closure::init(int numArgs, ActRec* ar, TypedValue* sp) {
    auto const invokeFunc = getVMClass()->lookupMethod(s_uuinvoke.get());
  
    m_thisOrClass = ar->m_this;
    if (ar->hasThis()) {
      if (invokeFunc->attrs() & AttrStatic) {
        // Only set the class for static closures.
        m_thisOrClass = reinterpret_cast<ObjectData*>(
          reinterpret_cast<intptr_t>(ar->getThis()->getVMClass()) | 1LL
        );
      } else {
        ar->getThis()->incRefCount();
      }
    }
  
    // Change my __invoke's m_cls to be the same as my creator's
    Class* scope = ar->m_func->cls();
    m_func = invokeFunc->cloneAndSetClass(scope);
  
    // copy the props to instance variables
    assert(m_cls->numDeclProperties() == numArgs);
    TypedValue* beforeCurUseVar = sp + numArgs;
    TypedValue* curProperty = propVec();
    for (int i = 0; i < numArgs; i++) {
      // teleport the references in here so we don't incref
      tvCopy(*--beforeCurUseVar, *curProperty++);
    }
  }
  
  c_Closure* c_Closure::clone() {
    auto closure = static_cast<c_Closure*>(ObjectData::clone());
    closure->m_VMStatics = m_VMStatics;
    closure->m_thisOrClass = m_thisOrClass;
    closure->m_func = m_func;
    return closure;
  }
  
  HphpArray* c_Closure::getStaticLocals() {
    if (m_VMStatics.get() == NULL) {
      m_VMStatics = ArrayData::Make(1);
    }
    return m_VMStatics.get();
  }
  
  ///////////////////////////////////////////////////////////////////////////////
  }
  