Public Member Functions¶

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. ShmMessageGrp (int nprocs)
Initialize ShmMessageGrp to use nprocs processors. 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 Member Functions¶

void basic_send (int target, int type, const 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
struct sembuf semdec
struct sembuf seminc

Additional Inherited Members¶

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