readme_selectdemo

这里包含了风河vxworks系统中的官方例程的C源代码

FILE LIST -
              selectDemo.c

DESCRIPTION -
	      This program demonstrates the usage of the select() routine.
	      The selectDemo task writes messages to pipe devices. The
	      selectOnReadFds task blocks on the select routine and then
	      reads a message only from the pipe devices that are ready
	      for reading.

RUNNING DEMO -
	      Place the selectDemo.c in your <Tornado> dir. Depending on
	      the target you have, define the CPU in your compile line
	      and use the Makefile in the BSP dir. to compile.

	      To run this code invoke the function selectDemo().

TESTED ON -   Host/Target : Solaris 2.5.1 / mv1604
	      VxWorks     : 5.3.1

EXAMPLE COMPILE LINE - 
    	      make CPU=PPC604 selectDemo.o

% make selectDemo.o
ccppc -B/petaluma1/mayur/tor101-ppc/host/sun4-solaris2/lib/gcc-lib/ 
-mstrict-align -ansi -nostdinc -O2 -fvolatile -fno-builtin -fno-for-scope 
-Wall -I/h   -I. -I/petaluma1/mayur/tor101-ppc/target/config/all 
-I/petaluma1/mayur/tor101-ppc/target/h 
-I/petaluma1/mayur/tor101-ppc/target/src/config 
-I/petaluma1/mayur/tor101-ppc/target/src/drv -DCPU=PPC604  -DMV1600 
-DTARGET_DIR="\"mv1604\""   -c selectDemo.c

OUTPUTS/LOGFILE -

On VxWorks target:
==================

-> ld <selectDemo.o
value = 716888 = 0xaf058
-> selectDemo

The Output on Console:
======================
"/pipe/1" pipe device created
"/pipe/2" pipe device created

Value of the fd for /pipe/1 = 10 
Value of the fd for /pipe/2 = 11 

selectOnReadFds: Number of bits (in fd_set struct) to be tested = 12
0 : To quit this Demo
1 : To write a message to "/pipe/1"
2 : To write a message to "/pipe/2"
3 : To write a message to "/pipe/1" and "/pipe/2"
Enter your choice :