NdbMutex.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
- /* Copyright (C) 2003 MySQL AB
- 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; either version 2 of the License, or
- (at your option) any later version.
- 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 <ndb_global.h>
- #include <NdbThread.h>
- #include <NdbMutex.h>
- #include <NdbMem.h>
- NdbMutex* NdbMutex_Create(void)
- {
- NdbMutex* pNdbMutex;
- int result;
- DBUG_ENTER("NdbMutex_Create");
-
- pNdbMutex = (NdbMutex*)NdbMem_Allocate(sizeof(NdbMutex));
- DBUG_PRINT("info",("NdbMem_Allocate 0x%lx",pNdbMutex));
-
- if (pNdbMutex == NULL)
- DBUG_RETURN(NULL);
-
- result = pthread_mutex_init(pNdbMutex, NULL);
- assert(result == 0);
-
- DBUG_RETURN(pNdbMutex);
- }
- int NdbMutex_Destroy(NdbMutex* p_mutex)
- {
- int result;
- DBUG_ENTER("NdbMutex_Destroy");
- if (p_mutex == NULL)
- DBUG_RETURN(-1);
- result = pthread_mutex_destroy(p_mutex);
- DBUG_PRINT("info",("NdbMem_Free 0x%lx",p_mutex));
- NdbMem_Free(p_mutex);
-
- DBUG_RETURN(result);
- }
- int NdbMutex_Lock(NdbMutex* p_mutex)
- {
- int result;
- if (p_mutex == NULL)
- return -1;
- result = pthread_mutex_lock(p_mutex);
-
- return result;
- }
- int NdbMutex_Unlock(NdbMutex* p_mutex)
- {
- int result;
- if (p_mutex == NULL)
- return -1;
- result = pthread_mutex_unlock(p_mutex);
-
- return result;
- }
- int NdbMutex_Trylock(NdbMutex* p_mutex)
- {
- int result = -1;
- if (p_mutex != NULL) {
- result = pthread_mutex_trylock(p_mutex);
- }
- return result;
- }