sr_getevtdatap( )

Description | Cautions | Example | See Also

Name:	void *sr_getevtdatap(ehandle)
Inputs:	unsigned long ehandle	· event handle returned by sr_waitevtEx( ), or zero if sr_waitevt( ) is used
Returns:	Address of variable data block
	NULL if no variable data
Includes:	srllib.h
Type:	Event Data Retrieval function

Description

The sr_getevtdatap( ) function returns the address of the variable data block associated with the current event. Use this data pointer and the event length sr_getevtlen( ) to extract the event data. The function returns a value of NULL if no additional data is associated with the current event.

NOTE:

Information about the data that can be returned by this function can be found in the appropriate technology-specific Programmer's Guide

Cautions

For applications using sr_waitevt( ), pass a 0 parameter; for example:
sr_getevtdatap(0).

Example

#include <windows.h>  
#include <srllib.h>  
#include <dxxxlib.h>
  
long  chdev[MAXDEVS];  
unsigned long  evt_handle;
  
main( ... )  
{  
   char channel_name[12];  
   int ch;
  
   for (ch = 0; ch < MAXDEVS; ch++) {  
      /* Build the channel name for each channel */  
      if ( (chdev[ch] = dx_open(channel_name, 0) ) == -1 ) {  
            printf("dx_open failed\n");  
            exit(1);  
       }  
   }
  
   /*  
    * Now initialize each device setting up the event masks and then issue  
    * the command asynchronously to start off the state machine.  
    */  
   for (ch = 0; ch < MAXDEVS; ch++) {  
        /* Set up the event masks and other initialization */
  
        /* set the channel onhook asynchronously */  
        if (dx_sethook( chdev[ch]. DX_ONHOOK, EV_ASYNC) == -1) {  
            /* sethook failed, handle the error */  
        }  
   }
  
   /* This is the main loop to control the Voice hardware */  
   while (FOREVER) {
  
        /* wait for the event */  
        sr_waitevtEx( chdev, MAXDEVS, -1, &evt_handle);  
        process_event( evt_handle);
  
    }
  
    int process_event( ehandle)  
        unsigned long ehandle;  
    {  
          int  voxhandle = sr_getevtdev(ehandle);  
          int *datap;  
          switch(sr_getevttype(ehandle)) {  
          case TDX_CST:  
                  *datap  = (int *) sr_getevtdatap(ehandle);  
                  if (datap->csd_data == DE_RINGS)  
                  {  
                   .  
                   .  
                   }  
                  break;
  
           case TDX_PLAY:  
                    .  
                  break;
  
           }
  
    }

See Also

• sr_getevtlen( )
• The appropriate technology-specific Programmer's Guide

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