diff options
Diffstat (limited to 'indra/llcommon/llthread.cpp')
| -rw-r--r-- | indra/llcommon/llthread.cpp | 151 |
1 files changed, 60 insertions, 91 deletions
diff --git a/indra/llcommon/llthread.cpp b/indra/llcommon/llthread.cpp index 49d05ef411..4917e3b935 100644 --- a/indra/llcommon/llthread.cpp +++ b/indra/llcommon/llthread.cpp @@ -63,6 +63,9 @@ void *APR_THREAD_FUNC LLThread::staticRun(apr_thread_t *apr_threadp, void *datap { LLThread *threadp = (LLThread *)datap; + // Create a thread local data. + LLThreadLocalData::create(threadp); + // Run the user supplied function threadp->run(); @@ -75,38 +78,20 @@ void *APR_THREAD_FUNC LLThread::staticRun(apr_thread_t *apr_threadp, void *datap } -LLThread::LLThread(const std::string& name, apr_pool_t *poolp) : - mPaused(FALSE), +LLThread::LLThread(std::string const& name) : + mPaused(false), mName(name), mAPRThreadp(NULL), - mStatus(STOPPED) + mStatus(STOPPED), + mThreadLocalData(NULL) { - // Thread creation probably CAN be paranoid about APR being initialized, if necessary - if (poolp) - { - mIsLocalPool = FALSE; - mAPRPoolp = poolp; - } - else - { - mIsLocalPool = TRUE; - apr_pool_create(&mAPRPoolp, NULL); // Create a subpool for this thread - } - mRunCondition = new LLCondition(mAPRPoolp); - - mLocalAPRFilePoolp = NULL ; + mRunCondition = new LLCondition; } LLThread::~LLThread() { shutdown(); - - if(mLocalAPRFilePoolp) - { - delete mLocalAPRFilePoolp ; - mLocalAPRFilePoolp = NULL ; - } } void LLThread::shutdown() @@ -143,7 +128,7 @@ void LLThread::shutdown() if (!isStopped()) { // This thread just wouldn't stop, even though we gave it time - llwarns << "LLThread::~LLThread() exiting thread before clean exit!" << llendl; + llwarns << "LLThread::shutdown() exiting thread before clean exit!" << llendl; // Put a stake in its heart. apr_thread_exit(mAPRThreadp, -1); return; @@ -153,15 +138,8 @@ void LLThread::shutdown() delete mRunCondition; mRunCondition = 0; - - if (mIsLocalPool && mAPRPoolp) - { - apr_pool_destroy(mAPRPoolp); - mAPRPoolp = 0; - } } - void LLThread::start() { llassert(isStopped()); @@ -170,7 +148,7 @@ void LLThread::start() mStatus = RUNNING; apr_status_t status = - apr_thread_create(&mAPRThreadp, NULL, staticRun, (void *)this, mAPRPoolp); + apr_thread_create(&mAPRThreadp, NULL, staticRun, (void *)this, tldata().mRootPool()); if(status == APR_SUCCESS) { @@ -195,7 +173,7 @@ void LLThread::pause() if (!mPaused) { // this will cause the thread to stop execution as soon as checkPause() is called - mPaused = 1; // Does not need to be atomic since this is only set/unset from the main thread + mPaused = true; // Does not need to be atomic since this is only set/unset from the main thread } } @@ -203,7 +181,7 @@ void LLThread::unpause() { if (mPaused) { - mPaused = 0; + mPaused = false; } wake(); // wake up the thread if necessary @@ -280,85 +258,76 @@ void LLThread::wakeLocked() } } -//============================================================================ - -LLMutex::LLMutex(apr_pool_t *poolp) : - mAPRMutexp(NULL) -{ - //if (poolp) - //{ - // mIsLocalPool = FALSE; - // mAPRPoolp = poolp; - //} - //else - { - mIsLocalPool = TRUE; - apr_pool_create(&mAPRPoolp, NULL); // Create a subpool for this thread - } - apr_thread_mutex_create(&mAPRMutexp, APR_THREAD_MUTEX_UNNESTED, mAPRPoolp); -} +#ifdef SHOW_ASSERT +// This allows the use of llassert(is_main_thread()) to assure the current thread is the main thread. +static apr_os_thread_t main_thread_id; +LL_COMMON_API bool is_main_thread(void) { return apr_os_thread_equal(main_thread_id, apr_os_thread_current()); } +#endif +// The thread private handle to access the LLThreadLocalData instance. +apr_threadkey_t* LLThreadLocalData::sThreadLocalDataKey; -LLMutex::~LLMutex() +//static +void LLThreadLocalData::init(void) { -#if MUTEX_DEBUG - llassert_always(!isLocked()); // better not be locked! -#endif - apr_thread_mutex_destroy(mAPRMutexp); - mAPRMutexp = NULL; - if (mIsLocalPool) + // Only do this once. + if (sThreadLocalDataKey) { - apr_pool_destroy(mAPRPoolp); + return; } -} + apr_status_t status = apr_threadkey_private_create(&sThreadLocalDataKey, &LLThreadLocalData::destroy, LLAPRRootPool::get()()); + ll_apr_assert_status(status); // Or out of memory, or system-imposed limit on the + // total number of keys per process {PTHREAD_KEYS_MAX} + // has been exceeded. -void LLMutex::lock() -{ - apr_thread_mutex_lock(mAPRMutexp); -#if MUTEX_DEBUG - // Have to have the lock before we can access the debug info - U32 id = LLThread::currentID(); - if (mIsLocked[id] != FALSE) - llerrs << "Already locked in Thread: " << id << llendl; - mIsLocked[id] = TRUE; + // Create the thread-local data for the main thread (this function is called by the main thread). + LLThreadLocalData::create(NULL); + +#ifdef SHOW_ASSERT + // This function is called by the main thread. + main_thread_id = apr_os_thread_current(); #endif } -void LLMutex::unlock() +// This is called once for every thread when the thread is destructed. +//static +void LLThreadLocalData::destroy(void* thread_local_data) { -#if MUTEX_DEBUG - // Access the debug info while we have the lock - U32 id = LLThread::currentID(); - if (mIsLocked[id] != TRUE) - llerrs << "Not locked in Thread: " << id << llendl; - mIsLocked[id] = FALSE; -#endif - apr_thread_mutex_unlock(mAPRMutexp); + delete static_cast<LLThreadLocalData*>(thread_local_data); } -bool LLMutex::isLocked() +//static +void LLThreadLocalData::create(LLThread* threadp) { - apr_status_t status = apr_thread_mutex_trylock(mAPRMutexp); - if (APR_STATUS_IS_EBUSY(status)) + LLThreadLocalData* new_tld = new LLThreadLocalData; + if (threadp) { - return true; + threadp->mThreadLocalData = new_tld; } - else + apr_status_t status = apr_threadkey_private_set(new_tld, sThreadLocalDataKey); + llassert_always(status == APR_SUCCESS); +} + +//static +LLThreadLocalData& LLThreadLocalData::tldata(void) +{ + if (!sThreadLocalDataKey) { - apr_thread_mutex_unlock(mAPRMutexp); - return false; + LLThreadLocalData::init(); } + + void* data; + apr_status_t status = apr_threadkey_private_get(&data, sThreadLocalDataKey); + llassert_always(status == APR_SUCCESS); + return *static_cast<LLThreadLocalData*>(data); } //============================================================================ -LLCondition::LLCondition(apr_pool_t *poolp) : - LLMutex(poolp) +LLCondition::LLCondition(LLAPRPool& parent) : LLMutex(parent) { - // base class (LLMutex) has already ensured that mAPRPoolp is set up. - - apr_thread_cond_create(&mAPRCondp, mAPRPoolp); + apr_thread_cond_create(&mAPRCondp, mPool()); } @@ -396,7 +365,7 @@ void LLThreadSafeRefCount::initThreadSafeRefCount() { if (!sMutex) { - sMutex = new LLMutex(0); + sMutex = new LLMutex; } } |