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Diffstat (limited to 'indra/llcommon/llaprpool.cpp')
-rw-r--r-- | indra/llcommon/llaprpool.cpp | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/indra/llcommon/llaprpool.cpp b/indra/llcommon/llaprpool.cpp deleted file mode 100644 index 6f21b61b65..0000000000 --- a/indra/llcommon/llaprpool.cpp +++ /dev/null @@ -1,202 +0,0 @@ -/** - * @file llaprpool.cpp - * - * $LicenseInfo:firstyear=2011&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2011, Linden Research, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License only. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA - * $/LicenseInfo$ - * - * CHANGELOG - * and additional copyright holders. - * - * 04/04/2010 - * - Initial version, written by Aleric Inglewood @ SL - * - * 10/11/2010 - * - Added APR_HAS_THREADS #if's to allow creation and destruction - * of subpools by threads other than the parent pool owner. - */ - -#include "linden_common.h" - -#include "llerror.h" -#include "llaprpool.h" -#include "llthread.h" - -// Create a subpool from parent. -void LLAPRPool::create(LLAPRPool& parent) -{ - llassert(!mPool); // Must be non-initialized. - mParent = &parent; - if (!mParent) // Using the default parameter? - { - // By default use the root pool of the current thread. - mParent = &LLThreadLocalData::tldata().mRootPool; - } - llassert(mParent->mPool); // Parent must be initialized. -#if APR_HAS_THREADS - // As per the documentation of APR (ie http://apr.apache.org/docs/apr/1.4/apr__pools_8h.html): - // - // Note that most operations on pools are not thread-safe: a single pool should only be - // accessed by a single thread at any given time. The one exception to this rule is creating - // a subpool of a given pool: one or more threads can safely create subpools at the same - // time that another thread accesses the parent pool. - // - // In other words, it's safe for any thread to create a (sub)pool, independent of who - // owns the parent pool. - mOwner = apr_os_thread_current(); -#else - mOwner = mParent->mOwner; - llassert(apr_os_thread_equal(mOwner, apr_os_thread_current())); -#endif - apr_status_t const apr_pool_create_status = apr_pool_create(&mPool, mParent->mPool); - llassert_always(apr_pool_create_status == APR_SUCCESS); - llassert(mPool); // Initialized. - apr_pool_cleanup_register(mPool, this, &s_plain_cleanup, &apr_pool_cleanup_null); -} - -// Destroy the (sub)pool, if any. -void LLAPRPool::destroy(void) -{ - // Only do anything if we are not already (being) destroyed. - if (mPool) - { -#if !APR_HAS_THREADS - // If we are a root pool, then every thread may destruct us: in that case - // we have to assume that no other thread will use this pool concurrently, - // of course. Otherwise, if we are a subpool, only the thread that owns - // the parent may destruct us, since that is the pool that is still alive, - // possibly being used by others and being altered here. - llassert(!mParent || apr_os_thread_equal(mParent->mOwner, apr_os_thread_current())); -#endif - apr_pool_t* pool = mPool; // The use of apr_pool_t is OK here. - // Temporary store before destroying the pool. - mPool = NULL; // Mark that we are BEING destructed. - apr_pool_cleanup_kill(pool, this, &s_plain_cleanup); - apr_pool_destroy(pool); - } -} - -bool LLAPRPool::parent_is_being_destructed(void) -{ - return mParent && (!mParent->mPool || mParent->parent_is_being_destructed()); -} - -LLAPRInitialization::LLAPRInitialization(void) -{ - static bool apr_initialized = false; - - if (!apr_initialized) - { - apr_initialize(); - } - - apr_initialized = true; -} - -bool LLAPRRootPool::sCountInitialized = false; -apr_uint32_t volatile LLAPRRootPool::sCount; - -apr_thread_mutex_t* gLogMutexp; -apr_thread_mutex_t* gCallStacksLogMutexp; - -LLAPRRootPool::LLAPRRootPool(void) : LLAPRInitialization(), LLAPRPool(0) -{ - // sCountInitialized don't need locking because when we get here there is still only a single thread. - if (!sCountInitialized) - { - // Initialize the logging mutex - apr_thread_mutex_create(&gLogMutexp, APR_THREAD_MUTEX_UNNESTED, mPool); - apr_thread_mutex_create(&gCallStacksLogMutexp, APR_THREAD_MUTEX_UNNESTED, mPool); - - apr_status_t status = apr_atomic_init(mPool); - llassert_always(status == APR_SUCCESS); - apr_atomic_set32(&sCount, 1); // Set to 1 to account for the global root pool. - sCountInitialized = true; - - // Initialize thread-local APR pool support. - // Because this recursively calls LLAPRRootPool::LLAPRRootPool(void) - // it must be done last, so that sCount is already initialized. - LLThreadLocalData::init(); - } - apr_atomic_inc32(&sCount); -} - -LLAPRRootPool::~LLAPRRootPool() -{ - if (!apr_atomic_dec32(&sCount)) - { - // The last pool was destructed. Cleanup remainder of APR. - LL_INFOS("APR") << "Cleaning up APR" << LL_ENDL; - - if (gLogMutexp) - { - // Clean up the logging mutex - - // All other threads NEED to be done before we clean up APR, so this is okay. - apr_thread_mutex_destroy(gLogMutexp); - gLogMutexp = NULL; - } - if (gCallStacksLogMutexp) - { - // Clean up the logging mutex - - // All other threads NEED to be done before we clean up APR, so this is okay. - apr_thread_mutex_destroy(gCallStacksLogMutexp); - gCallStacksLogMutexp = NULL; - } - - // Must destroy ALL, and therefore this last LLAPRRootPool, before terminating APR. - static_cast<LLAPRRootPool*>(this)->destroy(); - - apr_terminate(); - } -} - -//static -// Return a global root pool that is independent of LLThreadLocalData. -// Normally you should NOT use this. Only use for early initialization -// (before main) and deinitialization (after main). -LLAPRRootPool& LLAPRRootPool::get(void) -{ - static LLAPRRootPool global_APRpool(0); - return global_APRpool; -} - -void LLVolatileAPRPool::clearVolatileAPRPool() -{ - llassert_always(mNumActiveRef > 0); - if (--mNumActiveRef == 0) - { - if (isOld()) - { - destroy(); - mNumTotalRef = 0 ; - } - else - { - // This does not actually free the memory, - // it just allows the pool to re-use this memory for the next allocation. - clear(); - } - } - - // Paranoia check if the pool is jammed. - llassert(mNumTotalRef < (FULL_VOLATILE_APR_POOL << 2)) ; -} |