hphp/runtime/vm/resumable.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/runtime/vm/resumable.h"
  18
  19 #include "hphp/runtime/ext/asio/ext_async-generator.h"
  20
  21 #include "hphp/runtime/vm/act-rec.h"
  22 #include "hphp/runtime/vm/func.h"
  23 #include "hphp/runtime/vm/runtime.h"
  24 #include "hphp/runtime/vm/jit/types.h"
  25
  26 namespace HPHP {
  27
  28 ///////////////////////////////////////////////////////////////////////////////
  29
  30 char* resumeModeShortName(ResumeMode resumeMode) {
  31   switch (resumeMode) {
  32     case ResumeMode::None: return "";
  33     case ResumeMode::Async: return "ra";
  34     case ResumeMode::GenIter: return "rg";
  35     default: not_reached();
  36   }
  37 }
  38
  39 folly::Optional<ResumeMode> nameToResumeMode(const std::string& name) {
  40   if (name == "") return ResumeMode::None;
  41   if (name == "ra") return ResumeMode::Async;
  42   if (name == "rg") return ResumeMode::GenIter;
  43   return folly::none;
  44 }
  45
  46 ResumeMode resumeModeFromActRecImpl(ActRec* ar) {
  47   assertx(isResumed(ar));
  48   auto const func = ar->func();
  49   if (LIKELY(func->isAsyncFunction())) return ResumeMode::Async;
  50   if (func->isNonAsyncGenerator()) return ResumeMode::GenIter;
  51   auto const gen = frame_async_generator(ar);
  52   return gen->isEagerlyExecuted() ? ResumeMode::GenIter : ResumeMode::Async;
  53 }
  54
  55 ///////////////////////////////////////////////////////////////////////////////
  56
  57 }