src/pulsecore/refcnt.h

   1 #ifndef foopulserefcnthfoo
   2 #define foopulserefcnthfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2006 Lennart Poettering
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as
  11   published by the Free Software Foundation; either version 2.1 of the
  12   License, or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public
  20   License along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #include <pulsecore/atomic.h>
  26 #include <pulsecore/macro.h>
  27 #include <pulsecore/log.h>
  28
  29 /* #define DEBUG_REF */
  30
  31 #define PA_REFCNT_DECLARE \
  32     pa_atomic_t _ref
  33
  34 #define PA_REFCNT_VALUE(p) \
  35     pa_atomic_load(&(p)->_ref)
  36
  37 #define PA_REFCNT_INIT_ZERO(p) \
  38     pa_atomic_store(&(p)->_ref, 0)
  39
  40 #ifndef DEBUG_REF
  41
  42 #define PA_REFCNT_INIT(p) \
  43     pa_atomic_store(&(p)->_ref, 1)
  44
  45 #define PA_REFCNT_INC(p) \
  46     pa_atomic_inc(&(p)->_ref)
  47
  48 #define PA_REFCNT_DEC(p) \
  49     (pa_atomic_dec(&(p)->_ref)-1)
  50
  51 #else
  52
  53 /* If you need to debug ref counting problems define DEBUG_REF and
  54  * set $PULSE_LOG_BACKTRACE=5 or suchlike in the shell when running
  55  * PA */
  56
  57 #define PA_REFCNT_INIT(p)                       \
  58     do {                                        \
  59         pa_atomic_store(&(p)->_ref, 1);         \
  60         pa_log("REF: Init %p", p);              \
  61     } while (FALSE)
  62
  63 #define PA_REFCNT_INC(p)                        \
  64     do {                                        \
  65         pa_atomic_inc(&(p)->_ref);              \
  66         pa_log("REF: Inc %p", p);               \
  67     } while (FALSE)                             \
  68
  69 #define PA_REFCNT_DEC(p)                        \
  70     ({                                          \
  71         int _j = (pa_atomic_dec(&(p)->_ref)-1); \
  72         if (_j <= 0)                            \
  73             pa_log("REF: Done %p", p);          \
  74         else                                    \
  75             pa_log("REF: Dec %p", p);           \
  76         _j;                                     \
  77      })
  78
  79 #endif
  80
  81 #endif