标签:style blog http color 使用 ar strong 文件 sp
1. 使sqlite支持多线程(不确定是否非加不可,暂且加上,以备后患)
可以在编译时/启动时/运行时选择线程模式,参考:http://www.cnblogs.com/liaj/p/4015219.html
我的修改:
1)添加编译选项:
-DSQLITE_THREADSAFE=2
2)打开数据库文件使用sqlite3_open_v2替代sqlite3_open
sqlite3_open_v2(strDbName,sqlite_p, SQLITE_OPEN_READWRITE| SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX, NULL);
2. 使用sqlite3_busy_handler对SQLITE_BUSY状态进行处理(必须)
参考:
https://www.sqlite.org/c3ref/busy_handler.html
http://iihero.iteye.com/blog/1222539
http://blog.csdn.net/guofu8241260/article/details/36378291
我的修改:
static int callback_in_busy(void *ptr, int count) { int timeout = *((int *)ptr); usleep(timeout); return 1; } static void SqlGetLock(sqlite3 *sqlite_p, int ms) { if (ms > 0) { sqlite3_busy_handler(sqlite_p, callback_in_busy, (void*)&ms); } else { sqlite3_busy_handler(sqlite_p, 0, 0); } } int SqlExec(sqlite3 *sqlite_p, const char *strSql) { char *pErrMsg = NULL; int rc = SQLITE_OK; int ret = -1; SqlGetLock(sqlite_p, 200); rc = sqlite3_exec(sqlite_p, strSql, NULL, NULL, &pErrMsg); if (rc != SQLITE_OK) { printf("%s %d sqlite3_exec error:%s, strSql = [%s].\n", __func__, __LINE__, sqlite3_errmsg(sqlite_p), strSql); if (pErrMsg != NULL) { printf("%s %d sqlite3_exec error:%s\n", __func__, __LINE__, pErrMsg); sqlite3_free(pErrMsg); } ret = -1; } else { ret = 0; } return ret; }
sqlite:多线程操作数据库“database is locked”解决方法
标签:style blog http color 使用 ar strong 文件 sp
原文地址:http://www.cnblogs.com/tanghuimin0713/p/4025114.html