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/*--------
* Module: psqlodbc.c
*
* Description: This module contains the main entry point (DllMain)
* for the library. It also contains functions to get
* and set global variables for the driver in the registry.
*
* Classes: n/a
*
* API functions: none
*
* Comments: See "notice.txt" for copyright and license information.
*--------
*/
#include "psqlodbc.h"
#include "dlg_specific.h"
#include "environ.h"
GLOBAL_VALUES globals;
RETCODE SQL_API SQLDummyOrdinal(void);
#if defined(WIN_MULTITHREAD_SUPPORT)
extern CRITICAL_SECTION qlog_cs, mylog_cs, conns_cs;
#elif defined(POSIX_MULTITHREAD_SUPPORT)
extern pthread_mutex_t qlog_cs, mylog_cs, conns_cs;
#ifdef POSIX_THREADMUTEX_SUPPORT
#ifdef PG_RECURSIVE_MUTEXATTR
static pthread_mutexattr_t recur_attr;
const pthread_mutexattr_t* getMutexAttr(void)
{
static int init = 1;
if (init)
{
if (0 != pthread_mutexattr_init(&recur_attr))
return NULL;
if (0 != pthread_mutexattr_settype(&recur_attr, PG_RECURSIVE_MUTEXATTR))
return NULL;
}
init = 0;
return &recur_attr;
}
#else
const pthread_mutexattr_t* getMutexAttr(void)
{
return NULL;
}
#endif /* PG_RECURSIVE_MUTEXATTR */
#endif /* POSIX_THREADMUTEX_SUPPORT */
#endif /* WIN_MULTITHREAD_SUPPORT */
int initialize_global_cs(void)
{
static int init = 1;
if (!init)
return 0;
init = 0;
#ifdef POSIX_THREADMUTEX_SUPPORT
getMutexAttr();
#endif /* POSIX_THREADMUTEX_SUPPORT */
INIT_QLOG_CS;
INIT_MYLOG_CS;
INIT_CONNS_CS;
return 0;
}
static void finalize_global_cs(void)
{
DELETE_CONNS_CS;
DELETE_QLOG_CS;
DELETE_MYLOG_CS;
}
#ifdef WIN32
HINSTANCE NEAR s_hModule; /* Saved module handle. */
/* This is where the Driver Manager attaches to this Driver */
BOOL WINAPI
DllMain(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
s_hModule = hInst; /* Save for dialog boxes */
initialize_global_cs();
getCommonDefaults(DBMS_NAME, ODBCINST_INI, NULL);
break;
case DLL_THREAD_ATTACH:
break;
case DLL_PROCESS_DETACH:
finalize_global_cs();
return TRUE;
case DLL_THREAD_DETACH:
break;
default:
break;
}
return TRUE;
UNREFERENCED_PARAMETER(lpReserved);
}
#else /* not WIN32 */
#ifndef TRUE
#define TRUE (BOOL)1
#endif
#ifndef FALSE
#define FALSE (BOOL)0
#endif
#ifdef __GNUC__
/* This function is called at library initialization time. */
static BOOL
__attribute__((constructor))
init(void)
{
initialize_global_cs();
getCommonDefaults(DBMS_NAME, ODBCINST_INI, NULL);
return TRUE;
}
#else /* not __GNUC__ */
/*
* These two functions do shared library initialziation on UNIX, well at least
* on Linux. I don't know about other systems.
*/
BOOL
_init(void)
{
initialize_global_cs();
getCommonDefaults(DBMS_NAME, ODBCINST_INI, NULL);
return TRUE;
}
BOOL
_fini(void)
{
finalize_global_cs();
return TRUE;
}
#endif /* not __GNUC__ */
#endif /* not WIN32 */
/*
* This function is used to cause the Driver Manager to
* call functions by number rather than name, which is faster.
* The ordinal value of this function must be 199 to have the
* Driver Manager do this. Also, the ordinal values of the
* functions must match the value of fFunction in SQLGetFunctions()
*/
RETCODE SQL_API
SQLDummyOrdinal(void)
{
return SQL_SUCCESS;
}
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