 HMP学习－srl相关函数－sr_getevtdatap( ) |
函数原型：
Linux: void *sr_getevtdatap( )Windows: void *sr_getevtdatap(ehandle)
参数：Linux 无。Windows上sr_waitevtEx( )返回的事件句柄。
返回值：指向数据块的指针
作用：返回与该事件相关的变量数据块的地址。
示例函数：
#include <srllib.h>#include <dxxxlib.h>long int dx_handler(void*){ printf( "Got event with event data 0x%s\n",(char*)(sr_getevtdatap())); /* Tell SRL to keep the event */ return( 1 );}int main(){ int dxxxdev; int mode = SR_POLLMODE; /* Set SRL to run in polled mode */ if( sr_setparm( SRL_DEVICE, SR_MODEID, &mode ) == -1 ) { printf( "Cannot set SRL to polled mode\n" ); exit( 1 ); } /* open the device */ if(( dxxxdev = dx_open( "dxxxB1C1", 0 )) == -1 ) { printf( "failed to open device\n" ); exit( 1 ); } /* Enable handlers */ if( sr_enbhdlr( dxxxdev, EV_ANYEVT, dx_handler ) == -1 ) { printf( "Could not enable handler: error = %s\n", ATDV_ERRMSGP( SRL_DEVICE )); exit( 1 ); } /* Generate events via async calls */ if( dx_sethook( dxxxdev, DL_ONHOOK, EV_ASYNC ) == -1 ) { printf( "dx_sethook failed: error = %s\n", ATDV_ERRMSGP( dxxxdev )); exit( 1 ); } /* * Wait forever while handlers deal with events * All handlers return 0 except the one for the last * event returns 1 telling SRL to leave the event to wake up * sr_waitevt(). */ (void)sr_waitevt( -1 ); /* Cleanup */}
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