hphp/runtime/base/vm-worker.h

   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 #ifndef incl_HPHP_RUNTIME_VM_WORKER_H
  18 #define incl_HPHP_RUNTIME_VM_WORKER_H
  19
  20 #include "hphp/util/async-func.h"
  21 #include <functional>
  22
  23 namespace HPHP {
  24
  25 struct WorkerSpec {
  26   int numaNode{-1};
  27   unsigned hugeStackKb{0};
  28   unsigned tlExtraKb{0};
  29 };
  30
  31 // Run arbitrary code in a thread/fiber with VM context.
  32 struct VMWorker : private std::function<void(void)>
  33                 , private AsyncFuncImpl {
  34   template<class F>
  35   explicit VMWorker(F&& f)
  36     : std::function<void(void)>(f)
  37     , AsyncFuncImpl(this, run_, -1, 0, 0)
  38   {}
  39
  40   template<class F>
  41   VMWorker(WorkerSpec s, F&& f)
  42     : std::function<void(void)>(f)
  43     , AsyncFuncImpl(this, run_, s.numaNode, s.hugeStackKb, s.tlExtraKb)
  44   {}
  45
  46   VMWorker(const VMWorker&) = delete;
  47
  48   using AsyncFuncImpl::start;
  49   using AsyncFuncImpl::run;
  50   using AsyncFuncImpl::waitForEnd;
  51
  52  private:
  53   static void run_(void* obj) {
  54     // hphp_thread_init/exit are called as hooks of AsyncFuncImpl, see struct
  55     // SetThreadInitFini.
  56     auto p = static_cast<VMWorker*>(obj);
  57     (*p)();
  58   }
  59 };
  60
  61 }
  62
  63 #endif