readme_synchronizedemo.txt

vxworks 下多线程编程事例代码 包括：管道

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