readme_shmemalloc

来自「官方源码」· 代码 · 共 72 行

FILE LIST -
        buffSend.c
	buffReceive.c

DESCRIPTION -
	     The following code example uses memory from the shared memory
	     system partition to share data between tasks on different
	     CPUs.  The first member of the data structure is a shared
	     semaphore that is used for mutual exclusion. The send task
	     creates and initializes the structure. The receive task simply
	     accesses the data and displays it.
             
RUNNING DEMO -
	     Place the buffSend.c and buffReceive.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.

	     Add INCLUDE_SM_NET , INCLUDE_SM_SEQ_ADDR and INCLUDE_SM_OBJ
	     in the config.h file in the BSP

	     Install VxMP into your Tornado tree before running this code.
             
	     Re-make vxWorks and reboot your system.

	     The file buffSend.c writes to the shared memory. The function
   	     buffSend() writes to the shared semaphore protected buffer.

             The file buffReceive.c reads the shared memory. The function
             buffReceive() receives shared semaphore protected buffer.


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

             EXAMPLE COMPILE LINE - 
			    make CPU=PPC604 buffSend.o
			    make CPU=PPC604 buffReceive.o

% make buffSend.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 buffSend.c

% make buffReceive.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 buffReceive.c

OUTPUTS/LOGFILE -

On VxWorks target:
==================
-> ld <buffSend.o
value = 8380672 = 0x7fe100 = buffReceive + 0x8f0


On VxWorks target:
==================
-> ld <buffReceive.o
value = 8381792 = 0x7fe560 = buffReceive + 0xd50