hphp/util/shm-counter.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_SHM_COUNTER_H_
  18 #define incl_HPHP_SHM_COUNTER_H_
  19
  20 #include <string.h>
  21
  22 // #define ENABLE_SHM_COUNTER
  23
  24 #define SHM_COUNTER_KEY 768
  25
  26 #define SHM_COUNTER_DEF(n) ShmCounter n;
  27 #define SHM_COUNTER_INI(n) n(#n),
  28
  29 namespace HPHP {
  30 ///////////////////////////////////////////////////////////////////////////////
  31
  32 struct ShmCounter {
  33   ShmCounter() {}
  34   explicit ShmCounter(const char *n) : count(0) {
  35     size_t size = sizeof(name);
  36     strncpy(name, n, size);
  37     name[size - 1] = '\0';
  38   }
  39   void dump();
  40   char name[64];
  41   long long count;
  42 };
  43 struct ShmCounters {
  44   SHM_COUNTER_DEF(dummy_def1)
  45   SHM_COUNTER_DEF(dummy_def2)
  46   // Add your real counter definition here
  47
  48
  49   SHM_COUNTER_DEF(dummy_defmax)
  50
  51 ShmCounters() :
  52   SHM_COUNTER_INI(dummy_def1)
  53   SHM_COUNTER_INI(dummy_def2)
  54   // Add your real counter initialization here
  55
  56   dummy_defmax("dummy_defmax")
  57   {}
  58
  59 ~ShmCounters();
  60
  61   typedef void (*logError_t)(const char *fmt, ...);
  62   static bool initialize(bool create, logError_t logError = nullptr);
  63   static void dump();
  64 public:
  65   static bool created;
  66   static int shmid;
  67   static logError_t logError;
  68   static ShmCounters *s_shmCounters;
  69 };
  70
  71 ///////////////////////////////////////////////////////////////////////////////
  72 }
  73
  74 #endif // incl_HPHP_SHM_COUNTER_H_