CE Programs

To support Zipcode, we normally emulate the CE functions below. Again, some of these functions, particularly getmc(), freemc(), spawn(), and ckill(), are not available on all implementations (for instance, the Delta) and are restricted to the host program:

• getmc(char *computer_name, int nnodes) allocates a multicomputer;
• freemc(void) deallocates the allocated multicomputer;
• spawn(char *prog, int node, int pid, char *state) spawns processes on one or more nodes;
• ckill(int node, int pid) kills processes on one or more nodes;
• cosmic_init(void) starts the environment in a process;
• cosmic_exit(void) ends the environment in a process;
• mynode(void) returns the current process's logical node; number;
• mypid(void) returns the current process's identification number (pid);
• nnodes(void) returns the number of nodes in the multicomputer allocation;
• print(char *fmt, ...) resembles the standard C function printf(), except that the output is preceded by {node,pid} identification and terminated by a newline, with the output buffer automatically flushed; and
• clock() returns the running nodal clock value in microseconds.