include/memMeter.h

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef _MEM_METER_H_
  10 #define _MEM_METER_H_
  11
  12 /* object to track per-action memory usage (e.g. #idle objects) */
  13 class MemMeter
  14 {
  15 public:
  16     MemMeter() : level(0), hwater_level(0), hwater_stamp(0) {}
  17     ssize_t level;              /* current level (count or volume) */
  18     ssize_t hwater_level;       /* high water mark */
  19     time_t hwater_stamp;        /* timestamp of last high water mark change */
  20 };
  21
  22 #define memMeterSyncHWater(m)  { (m).hwater_level = (m).level; (m).hwater_stamp = squid_curtime ? squid_curtime : time(NULL); }
  23 #define memMeterCheckHWater(m) { if ((m).hwater_level < (m).level) memMeterSyncHWater((m)); }
  24 #define memMeterInc(m) { (m).level++; memMeterCheckHWater(m); }
  25 #define memMeterDec(m) { (m).level--; }
  26 #define memMeterAdd(m, sz) { (m).level += (sz); memMeterCheckHWater(m); }
  27 #define memMeterDel(m, sz) { (m).level -= (sz); }
  28
  29 #endif /* _MEM_METER_H_ */
  30