NdbThread.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
- /* 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 <my_pthread.h>
- #include <NdbMem.h>
- #define MAX_THREAD_NAME 16
- /*#define USE_PTHREAD_EXTRAS*/
- #ifdef NDB_SHM_TRANSPORTER
- int g_ndb_shm_signum= 0;
- #endif
- struct NdbThread
- {
- pthread_t thread;
- char thread_name[MAX_THREAD_NAME];
- NDB_THREAD_FUNC * func;
- void * object;
- };
- static
- void*
- ndb_thread_wrapper(void* _ss){
- my_thread_init();
- {
- DBUG_ENTER("ndb_thread_wrapper");
- #ifdef NDB_SHM_TRANSPORTER
- if (g_ndb_shm_signum)
- {
- sigset_t mask;
- DBUG_PRINT("info",("Block signum %d",g_ndb_shm_signum));
- sigemptyset(&mask);
- sigaddset(&mask, g_ndb_shm_signum);
- pthread_sigmask(SIG_BLOCK, &mask, 0);
- }
- #endif
- {
- /**
- * Block all signals to thread by default
- * let them go to main process instead
- */
- sigset_t mask;
- sigfillset(&mask);
- pthread_sigmask(SIG_BLOCK, &mask, 0);
- }
-
- {
- void *ret;
- struct NdbThread * ss = (struct NdbThread *)_ss;
- ret= (* ss->func)(ss->object);
- DBUG_POP();
- NdbThread_Exit(ret);
- }
- /* will never be reached */
- DBUG_RETURN(0);
- }
- }
- struct NdbThread* NdbThread_Create(NDB_THREAD_FUNC *p_thread_func,
- NDB_THREAD_ARG *p_thread_arg,
- const NDB_THREAD_STACKSIZE thread_stack_size,
- const char* p_thread_name,
- NDB_THREAD_PRIO thread_prio)
- {
- struct NdbThread* tmpThread;
- int result;
- pthread_attr_t thread_attr;
- DBUG_ENTER("NdbThread_Create");
- (void)thread_prio; /* remove warning for unused parameter */
- if (p_thread_func == NULL)
- DBUG_RETURN(NULL);
- tmpThread = (struct NdbThread*)NdbMem_Allocate(sizeof(struct NdbThread));
- if (tmpThread == NULL)
- DBUG_RETURN(NULL);
- DBUG_PRINT("info",("thread_name: %s", p_thread_name));
- strnmov(tmpThread->thread_name,p_thread_name,sizeof(tmpThread->thread_name));
- pthread_attr_init(&thread_attr);
- #if (SIZEOF_CHARP == 8)
- pthread_attr_setstacksize(&thread_attr, 2*thread_stack_size);
- #else
- pthread_attr_setstacksize(&thread_attr, thread_stack_size);
- #endif
- #ifdef USE_PTHREAD_EXTRAS
- /* Guard stack overflow with a 2k databuffer */
- pthread_attr_setguardsize(&thread_attr, 2048);
- #endif
- #ifdef PTHREAD_CREATE_JOINABLE /* needed on SCO */
- pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE);
- #endif
- tmpThread->func= p_thread_func;
- tmpThread->object= p_thread_arg;
- result = pthread_create(&tmpThread->thread,
- &thread_attr,
- ndb_thread_wrapper,
- tmpThread);
- assert(result==0);
- pthread_attr_destroy(&thread_attr);
- DBUG_PRINT("exit",("ret: %lx", tmpThread));
- DBUG_RETURN(tmpThread);
- }
- void NdbThread_Destroy(struct NdbThread** p_thread)
- {
- DBUG_ENTER("NdbThread_Destroy");
- if (*p_thread != NULL){
- DBUG_PRINT("enter",("*p_thread: %lx", * p_thread));
- free(* p_thread);
- * p_thread = 0;
- }
- DBUG_VOID_RETURN;
- }
- int NdbThread_WaitFor(struct NdbThread* p_wait_thread, void** status)
- {
- int result;
- if (p_wait_thread == NULL)
- return 0;
- if (p_wait_thread->thread == 0)
- return 0;
- result = pthread_join(p_wait_thread->thread, status);
-
- return result;
- }
- void NdbThread_Exit(void *status)
- {
- my_thread_end();
- pthread_exit(status);
- }
- int NdbThread_SetConcurrencyLevel(int level)
- {
- #ifdef USE_PTHREAD_EXTRAS
- return pthread_setconcurrency(level);
- #else
- (void)level; /* remove warning for unused parameter */
- return 0;
- #endif
- }