DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5b81998bb7ab)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsAtomicRefcnt_h__
#define nsAtomicRefcnt_h__

#include "nscore.h"
#include "pratom.h"

class nsAutoRefCnt;

// This header defines functions for modifying refcounts which wrap the
// PR_ATOMIC_* macros.

#if defined(XP_WIN)

#if PR_BYTES_PER_LONG == 4
typedef volatile long nsAtomicRefcnt;
#else
#error "Windows should have 4 bytes per long."
#endif

#else /* !defined(XP_WIN) */

typedef int32_t  nsAtomicRefcnt;

#endif

inline int32_t
NS_AtomicIncrementRefcnt(int32_t &refcnt)
{
  return PR_ATOMIC_INCREMENT(&refcnt);
}

inline nsrefcnt
NS_AtomicIncrementRefcnt(nsrefcnt &refcnt)
{
  return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
}

inline nsrefcnt
NS_AtomicIncrementRefcnt(nsAutoRefCnt &refcnt)
{
  // This cast is safe since nsAtomicRefCnt contains just one member, its refcount.
  return (nsrefcnt) PR_ATOMIC_INCREMENT((nsAtomicRefcnt*)&refcnt);
}

inline nsrefcnt
NS_AtomicDecrementRefcnt(nsrefcnt &refcnt)
{
  return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
}

inline nsrefcnt
NS_AtomicDecrementRefcnt(nsAutoRefCnt &refcnt)
{
  return (nsrefcnt) PR_ATOMIC_DECREMENT((nsAtomicRefcnt*)&refcnt);
}

inline int32_t
NS_AtomicDecrementRefcnt(int32_t &refcnt)
{
  return PR_ATOMIC_DECREMENT(&refcnt);
}

#endif