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sc::ShmMessageGrp Class Reference The ShmMessageGrp class is an implementation of MessageGrp that allows multiple process to be started that communicate with shared memory. More... #include <messshm.h> Inheritance diagram for sc::ShmMessageGrp: [legend]Collaboration diagram for sc::ShmMessageGrp: [legend]List of all members. Public Methods   ShmMessageGrp ()   Reads the number of processors from environmental variable NUMPROC.   ShmMessageGrp (const Ref< KeyVal > &)   The ShmMessageGrp KeyVal constructor takes a single keyword that specifies the number of processors. More...   ShmMessageGrp (int nprocs)   Initialize ShmMessageGrp to use nprocs processors.   ~ShmMessageGrp () void  sync ()   Synchronize all of the processors. Ref< MessageGrp >  clone (void)   Returns a copy of this MessageGrp specialization that provides an independent communication context. Protected Methods void  basic_send (int target, int type, void *data, int nbyte)   Must be implemented by specializations. void  basic_recv (int type, void *data, int nbyte)   Must be implemented by specializations. int  basic_probe (int type)   Must be implemented by specializations. void  initialize (int nprocs) void  initialize () msgbuf_t *  NEXT_MESSAGE (msgbuf_t *m) void  get_change (int node) void  put_change (int node) void  wait_for_write (int node) void  release_write (int node) void  print_buffer (int node, int me) Protected Attributes commbuf_t *  commbuf [MAXPROCS] int  shmid int  semid int  change_semid void *  sharedmem sembuf  semdec sembuf  seminc Detailed Description The ShmMessageGrp class is an implementation of MessageGrp that allows multiple process to be started that communicate with shared memory. This only provides improved performance if you have multiple CPU's in a symmetric multiprocessor configuration. Nonetheless, it is quite useful on a single CPU for tracking down bugs. Constructor & Destructor Documentation sc::ShmMessageGrp::ShmMessageGrp (  const Ref< KeyVal > &    )    The ShmMessageGrp KeyVal constructor takes a single keyword that specifies the number of processors. Here is an example of a ParsedKeyVal input that creates a ShmMessageGrp that runs on four processors: message<ShmMessageGrp>: n = 4 The documentation for this class was generated from the following file: messshm.h