dll.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) 2000-2004 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.
- There are special exceptions to the terms and conditions of the GPL as it
- is applied to this software. View the full text of the exception in file
- EXCEPTIONS-CLIENT in the directory of this software distribution.
- 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 */
- /*
- ** Handling initialization of the dll library
- */
- #include <my_global.h>
- #include <my_sys.h>
- #include <my_pthread.h>
- static bool libmysql_inited=0;
- void libmysql_init(void)
- {
- if (libmysql_inited)
- return;
- libmysql_inited=1;
- my_init();
- {
- DBUG_ENTER("libmysql_init");
- #ifdef LOG_ALL
- DBUG_PUSH("d:t:S:O,c::\tmp\libmysql.log");
- #else
- if (getenv("LIBMYSQL_LOG") != NULL)
- DBUG_PUSH(getenv("LIBMYSQL_LOG"));
- #endif
- DBUG_VOID_RETURN;
- }
- }
- #ifdef __WIN__
- static int inited=0,threads=0;
- HINSTANCE NEAR s_hModule; /* Saved module handle */
- DWORD main_thread;
- BOOL APIENTRY LibMain(HANDLE hInst,DWORD ul_reason_being_called,
- LPVOID lpReserved)
- {
- switch (ul_reason_being_called) {
- case DLL_PROCESS_ATTACH: /* case of libentry call in win 3.x */
- if (!inited++)
- {
- s_hModule=hInst;
- libmysql_init();
- main_thread=GetCurrentThreadId();
- }
- break;
- case DLL_THREAD_ATTACH:
- threads++;
- my_thread_init();
- break;
- case DLL_PROCESS_DETACH: /* case of wep call in win 3.x */
- if (!--inited) /* Safety */
- {
- /* my_thread_init() */ /* This may give extra safety */
- my_end(0);
- }
- break;
- case DLL_THREAD_DETACH:
- /* Main thread will free by my_end() */
- threads--;
- if (main_thread != GetCurrentThreadId())
- my_thread_end();
- break;
- default:
- break;
- } /* switch */
- return TRUE;
- UNREFERENCED_PARAMETER(lpReserved);
- } /* LibMain */
- int __stdcall DllMain(HANDLE hInst,DWORD ul_reason_being_called,LPVOID lpReserved)
- {
- return LibMain(hInst,ul_reason_being_called,lpReserved);
- }
- #elif defined(WINDOWS)
- /****************************************************************************
- ** This routine is called by LIBSTART.ASM at module load time. All it
- ** does in this sample is remember the DLL module handle. The module
- ** handle is needed if you want to do things like load stuff from the
- ** resource file (for instance string resources).
- ****************************************************************************/
- int _export FAR PASCAL libmain(HANDLE hModule,short cbHeapSize,
- UCHAR FAR *lszCmdLine)
- {
- s_hModule = hModule;
- libmysql_init();
- return TRUE;
- }
- #endif
- #ifdef OS2
- /*
- This function is called automatically by _DLL_InitTerm
- Every dll runtime enviroment is not tz enabled, so tzset()
- must be called to enable TZ handling
- Also timezone is fixed.
- */
- extern "C" unsigned long _System DllMain(unsigned long modhandle,
- unsigned long flag)
- {
- if (flag == 0) {
- tzset(); /* Set tzname */
- time_t currentTime = time(NULL);
- struct tm *ts = localtime(¤tTime);
- if (ts->tm_isdst > 0)
- _timezone -= 3600;
- }
- }
- #endif