diff options
Diffstat (limited to 'indra/llcommon/llthread.h')
| -rw-r--r-- | indra/llcommon/llthread.h | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/indra/llcommon/llthread.h b/indra/llcommon/llthread.h index 5c8bbca2ca..0d22bc863d 100644 --- a/indra/llcommon/llthread.h +++ b/indra/llcommon/llthread.h @@ -241,47 +241,43 @@ public: LLThreadSafeRefCount(const LLThreadSafeRefCount&); LLThreadSafeRefCount& operator=(const LLThreadSafeRefCount& ref) { - if (sMutex) - { - sMutex->lock(); - } mRef = 0; - if (sMutex) - { - sMutex->unlock(); - } return *this; } - - void ref() { - if (sMutex) sMutex->lock(); mRef++; - if (sMutex) sMutex->unlock(); } S32 unref() { - llassert(mRef >= 1); - if (sMutex) sMutex->lock(); - S32 res = --mRef; - if (sMutex) sMutex->unlock(); - if (0 == res) + llassert(mRef >= 1); + bool time_to_die = (mRef == 1); + if (time_to_die) { - delete this; + if (sMutex) sMutex->lock(); + // Looks redundant, but is very much not + // We need to check again once we've acquired the lock + // so that two threads who get into the if in parallel + // don't both attempt to the delete. + // + mRef--; + if (mRef == 0) + delete this; + if (sMutex) sMutex->unlock(); return 0; } - return res; - } + return --mRef; + } S32 getNumRefs() const { - return mRef; + const S32 currentVal = mRef.CurrentValue(); + return currentVal; } private: - S32 mRef; + LLAtomic32< S32 > mRef; }; //============================================================================ |