readme_synchronizedemo.txt

对Vxworks进程通讯的信号量详细介绍

FILE LIST -
	      synchronizeDemo.c

DESCRIPTION -
	      This demo demonstrates the intertask synchronization using binary
	      semaphores.

	      It creates two (semId1 and semId2) binary semaphores for intertask
	      synchronization between two tasks (taskA and taskB). taskA needs
	      to execute
	      an event (event A). On completion of event A, taskB needs to execute
	      another event (event B). On completion of the event B, taskA needs to
	      execute event A. This process needs to be done iteratively. SynchronizeDemo
	      executes this process.

	      To run the code invoke the function synchronizeDemo().

RUNNING DEMO -
	      Place the synchronizeDemo.c file in your <Tornado> dir.  
	      Depending on the target
	      you have, define the CPU in your compile line and use the 
	      Makefile in the <tornado> directory to compile the code.

	      Run synchronizeDemo () on vxworks target.

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

	      EXAMPLE COMPILE LINE - (use the Makefile in the BSP)
			    make CPU=PPC604 synchronizeDemo.o

% make synchronizeDemo.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 synchronizeDemo.c

OUTPUTS/LOGFILE -

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

-> ld <synchronizeDemo.o 
value = 708664 = 0xad038 = tcpstates + 0x28
-> synchronizeDemo
value = 0 = 0x0

The Output on Console:
======================

taskA: Started first by taking the semId1 semaphore - 1 times
This is task  <tTaskA> : Event A now done
taskA: I'm done, taskB can now proceed; Releasing semId2 semaphore

taskB: Synchronized with taskA's release of semId2 - 1 times
This is task  <tTaskB> : Event B now done
taskB: I'm done, taskA can now proceed; Releasing semId1 semaphore


taskA: Started first by taking the semId1 semaphore - 2 times
This is task  <tTaskA> : Event A now done
taskA: I'm done, taskB can now proceed; Releasing semId2 semaphore

taskB: Synchronized with taskA's release of smes
This is task  <tTaskB> : Event B now done
taskB: I'm done, taskA can now proceed; Releasing semId1 semaphore


taskA: Started first by taking the semId1 semaphore - 3 times
This is task  <tTaskA> : Event A now done
taskA: I'm done, taskB can now proceed; Releasing semId2 semaphore

taskB: Synchronized with taskA's release of semId2 - 3 times
This is task  <tTaskB> : Event B now done
taskB: I'm done, taskA can now proceed; Releasing semId1 semaphore




 synchronizeDemo now completed