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author | Sergey Petrunya <psergey@askmonty.org> | 2009-09-08 00:50:10 +0400 |
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committer | Sergey Petrunya <psergey@askmonty.org> | 2009-09-08 00:50:10 +0400 |
commit | 29f0dcb56337a3e352ad7a70dcff6b25bb605325 (patch) | |
tree | 84935c21dc958724ae7dcbeeca0c0f08986fc430 /storage/innodb_plugin/ut/ut0wqueue.c | |
parent | 915a624cbcb58a10a2cfb2e2e4fd5029191fa86a (diff) | |
parent | 8a2454f8e9fce648272577fcf8006ae6e6806cf9 (diff) | |
download | mariadb-git-29f0dcb56337a3e352ad7a70dcff6b25bb605325.tar.gz |
Merge MySQL->MariaDB
* Finished Monty and Jani's merge
* Some InnoDB tests still fail (because it's old xtradb code run against
newer testsuite). They are expected to go after mergning with the latest
xtradb.
Diffstat (limited to 'storage/innodb_plugin/ut/ut0wqueue.c')
-rw-r--r-- | storage/innodb_plugin/ut/ut0wqueue.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/storage/innodb_plugin/ut/ut0wqueue.c b/storage/innodb_plugin/ut/ut0wqueue.c new file mode 100644 index 00000000000..5220d1e17f4 --- /dev/null +++ b/storage/innodb_plugin/ut/ut0wqueue.c @@ -0,0 +1,118 @@ +/***************************************************************************** + +Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program 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 General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +#include "ut0wqueue.h" + +/*******************************************************************//** +@file ut/ut0wqueue.c +A work queue + +Created 4/26/2006 Osku Salerma +************************************************************************/ + +/****************************************************************//** +Create a new work queue. +@return work queue */ +UNIV_INTERN +ib_wqueue_t* +ib_wqueue_create(void) +/*===================*/ +{ + ib_wqueue_t* wq = mem_alloc(sizeof(ib_wqueue_t)); + + mutex_create(&wq->mutex, SYNC_WORK_QUEUE); + + wq->items = ib_list_create(); + wq->event = os_event_create(NULL); + + return(wq); +} + +/****************************************************************//** +Free a work queue. */ +UNIV_INTERN +void +ib_wqueue_free( +/*===========*/ + ib_wqueue_t* wq) /*!< in: work queue */ +{ + ut_a(!ib_list_get_first(wq->items)); + + mutex_free(&wq->mutex); + ib_list_free(wq->items); + os_event_free(wq->event); + + mem_free(wq); +} + +/****************************************************************//** +Add a work item to the queue. */ +UNIV_INTERN +void +ib_wqueue_add( +/*==========*/ + ib_wqueue_t* wq, /*!< in: work queue */ + void* item, /*!< in: work item */ + mem_heap_t* heap) /*!< in: memory heap to use for allocating the + list node */ +{ + mutex_enter(&wq->mutex); + + ib_list_add_last(wq->items, item, heap); + os_event_set(wq->event); + + mutex_exit(&wq->mutex); +} + +/****************************************************************//** +Wait for a work item to appear in the queue. +@return work item */ +UNIV_INTERN +void* +ib_wqueue_wait( +/*===========*/ + ib_wqueue_t* wq) /*!< in: work queue */ +{ + ib_list_node_t* node; + + for (;;) { + os_event_wait(wq->event); + + mutex_enter(&wq->mutex); + + node = ib_list_get_first(wq->items); + + if (node) { + ib_list_remove(wq->items, node); + + if (!ib_list_get_first(wq->items)) { + /* We must reset the event when the list + gets emptied. */ + os_event_reset(wq->event); + } + + break; + } + + mutex_exit(&wq->mutex); + } + + mutex_exit(&wq->mutex); + + return(node->data); +} |