nfxlck.ec

封装了数据库的基本操作

/*****************************************************************************/
/*                   Database Public Function For Informix                   */
/* ------------------------------------------------------------------------- */
/*  Author : Shih Ho                                                         */
/*  Date   : March 27, 1998                                                  */
/*****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include "dblib.h"
#include "nfxprv.h"

/*===========================================================================*/
/* Public Funciton - DBlock                                                  */
/*---------------------------------------------------------------------------*/
int DBTlock( Table, Mode )
char *Table;
int  Mode;
{
  int r = -1;
  char *Buf;

  if( Table != NULL ){
    switch( Mode ){
    case DBLM_NONE:
      if( ( Buf = ( void * ) malloc( 180 ) ) != NULL )
        sprintf( Buf, "UNLOCK TABLE %s", Table );
      break;
    case DBLM_SHARE:
      if( ( Buf = ( void * ) malloc( 180 ) ) != NULL )
        sprintf( Buf, "LOCK TABLE %s IN SHARE MODE", Table );
      break;
    case DBLM_EXCL:
      if( ( Buf = ( void * ) malloc( 180 ) ) != NULL )
        sprintf( Buf, "LOCK TABLE %s IN EXCLUSIVE MODE", Table );
      break;
    default:
      Buf = NULL;
    }
    if( Buf == NULL )
      r = -2;
    else{
      r = DBexec( Buf, 0 );
      free( Buf );
    }
  }
  return( r );
}

/*****************************************************************************/