static void
scheduler_msg_dispatch(void)
{
size_t n, sz, count;
struct evpstate evpstates[MAX_BATCH_SIZE];
uint64_t evpid, evpids[MAX_BATCH_SIZE], u64;
uint32_t msgids[MAX_BATCH_SIZE], version, msgid;
struct scheduler_info info;
int typemask, r, type, types[MAX_BATCH_SIZE];
int delay;
switch (imsg.hdr.type) {
case PROC_SCHEDULER_INIT:
log_debug("scheduler-api: PROC_SCHEDULER_INIT");
scheduler_msg_get(&version, sizeof(version));
scheduler_msg_end();
if (version != PROC_SCHEDULER_API_VERSION) {
log_warnx("warn: scheduler-api: bad API version");
fatalx("scheduler-api: exiting");
}
r = handler_init();
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_INSERT:
log_debug("scheduler-api: PROC_SCHEDULER_INSERT");
scheduler_msg_get(&info, sizeof(info));
scheduler_msg_end();
r = handler_insert(&info);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_COMMIT:
log_debug("scheduler-api: PROC_SCHEDULER_COMMIT");
scheduler_msg_get(&msgid, sizeof(msgid));
scheduler_msg_end();
n = handler_commit(msgid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &n, sizeof(n));
break;
case PROC_SCHEDULER_ROLLBACK:
log_debug("scheduler-api: PROC_SCHEDULER_ROLLBACK");
scheduler_msg_get(&msgid, sizeof(msgid));
scheduler_msg_end();
n = handler_rollback(msgid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &n, sizeof(n));
break;
case PROC_SCHEDULER_UPDATE:
log_debug("scheduler-api: PROC_SCHEDULER_UPDATE");
scheduler_msg_get(&info, sizeof(info));
scheduler_msg_end();
r = handler_update(&info);
scheduler_msg_add(&r, sizeof(r));
if (r == 1)
scheduler_msg_add(&info, sizeof(info));
scheduler_msg_close();
break;
case PROC_SCHEDULER_DELETE:
log_debug("scheduler-api: PROC_SCHEDULER_DELETE");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_end();
r = handler_delete(evpid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_HOLD:
log_debug("scheduler-api: PROC_SCHEDULER_HOLD");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_get(&u64, sizeof(u64));
scheduler_msg_end();
r = handler_hold(evpid, u64);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_RELEASE:
log_debug("scheduler-api: PROC_SCHEDULER_RELEASE");
scheduler_msg_get(&type, sizeof(type));
scheduler_msg_get(&u64, sizeof(u64));
scheduler_msg_get(&r, sizeof(r));
scheduler_msg_end();
r = handler_release(type, u64, r);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_BATCH:
log_debug("scheduler-api: PROC_SCHEDULER_BATCH");
scheduler_msg_get(&typemask, sizeof(typemask));
scheduler_msg_get(&count, sizeof(count));
scheduler_msg_end();
if (count > MAX_BATCH_SIZE)
count = MAX_BATCH_SIZE;
r = handler_batch(typemask, &delay, &count, evpids, types);
scheduler_msg_add(&r, sizeof(r));
scheduler_msg_add(&delay, sizeof(delay));
scheduler_msg_add(&count, sizeof(count));
if (r > 0) {
scheduler_msg_add(evpids, sizeof(*evpids) * count);
scheduler_msg_add(types, sizeof(*types) * count);
}
scheduler_msg_close();
break;
case PROC_SCHEDULER_MESSAGES:
log_debug("scheduler-api: PROC_SCHEDULER_MESSAGES");
scheduler_msg_get(&msgid, sizeof(msgid));
scheduler_msg_get(&sz, sizeof(sz));
scheduler_msg_end();
if (sz > MAX_BATCH_SIZE)
sz = MAX_BATCH_SIZE;
n = handler_messages(msgid, msgids, sz);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, msgids,
n * sizeof(*msgids));
break;
case PROC_SCHEDULER_ENVELOPES:
log_debug("scheduler-api: PROC_SCHEDULER_ENVELOPES");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_get(&sz, sizeof(sz));
scheduler_msg_end();
if (sz > MAX_BATCH_SIZE)
sz = MAX_BATCH_SIZE;
n = handler_envelopes(evpid, evpstates, sz);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, evpstates,
n * sizeof(*evpstates));
break;
case PROC_SCHEDULER_SCHEDULE:
log_debug("scheduler-api: PROC_SCHEDULER_SCHEDULE");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_end();
r = handler_schedule(evpid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_REMOVE:
log_debug("scheduler-api: PROC_SCHEDULER_REMOVE");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_end();
r = handler_remove(evpid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_SUSPEND:
log_debug("scheduler-api: PROC_SCHEDULER_SUSPEND");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_end();
r = handler_suspend(evpid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
case PROC_SCHEDULER_RESUME:
log_debug("scheduler-api: PROC_SCHEDULER_RESUME");
scheduler_msg_get(&evpid, sizeof(evpid));
scheduler_msg_end();
r = handler_resume(evpid);
imsg_compose(&ibuf, PROC_SCHEDULER_OK, 0, 0, -1, &r, sizeof(r));
break;
default:
log_warnx("warn: scheduler-api: bad message %d", imsg.hdr.type);
fatalx("scheduler-api: exiting");
}
}
/**
Procedure: commandHandler
Purpose: Handles User Commands & Command Execution
Parameters: None
Return value: None
Calls: displayWelcome, keyboardInput, cmpP2S, handler_help, handler_version, handler_set_date, handler_get_date, handler_display_mpx,
handler_display_history, handler_terminate_mpx, change_prompt, handler_help_function, handler_create_pcb, handler_delete_pcb,
handler_block, handler_unblock, handler_suspend, handler_resume, handler_set_priority, handler_show_pcb, handler_show, displayClosing,
commandCleanup, sys_exit
Globals: comDone, userCommand
Errors: None
**/
void commandHandler(){
int userCommandSize;
displayWelcome(); //2.1 Display the Welcome Message
while(comDone !=1){ //2.2 Begin While Loop for User Commands
userCommand = NULL;
printf("\nPlease enter the command to be executed(case sensitive).\n");
userCommand = keyboardInput(0); //2.2.1 Request User Input & Accept Command from User
printf("\n");
//Decision Statement
if(cmpP2S(userCommand, "help") == 1 || cmpP2S(userCommand, "/?") == 1){
handler_help();
}
else if(cmpP2S(userCommand, "version") == 1){
handler_version();
}
else if(cmpP2S(userCommand, "set_date") == 1){
handler_set_date();
//fix = 1;
}
else if(cmpP2S(userCommand, "get_date") == 1){
handler_get_date();
}
else if(cmpP2S(userCommand, "display_mpx") == 1){
handler_display_mpx();
}
//else if(cmpP2S(userCommand, "display_history") == 1){
// handler_display_history();
//}
else if(cmpP2S(userCommand, "terminate_mpx") == 1||cmpP2S(userCommand, "exit") == 1||cmpP2S(userCommand, "quit") == 1){
handler_terminate_mpx();
}
else if(cmpP2S(userCommand, "change_prompt") == 1){
change_prompt();
//fix = 1;
}
else if(cmpP2S(userCommand, "help_version")==1){
handler_help_function("version");
}
else if(cmpP2S(userCommand, "help_set_date")==1){
handler_help_function("set_date");
}
else if(cmpP2S(userCommand, "help_get_date")==1){
handler_help_function("get_date");
}
else if(cmpP2S(userCommand, "help_display_mpx")==1){
handler_help_function("display_mpx");
}
else if(cmpP2S(userCommand, "help_terminate_mpx")==1){
handler_help_function("terminate_mpx");
}
else if(cmpP2S(userCommand, "help_change_prompt")==1){
handler_help_function("change_prompt");
}
else if(cmpP2S(userCommand, "help_create_pcb")==1){
handler_help_function("create_pcb");
}
else if(cmpP2S(userCommand, "create_pcb")==1){
handler_create_pcb();
}
else if(cmpP2S(userCommand, "help_delete_pcb")==1){
handler_help_function("delete_pcb");
}
else if(cmpP2S(userCommand, "delete_pcb")==1){
handler_delete_pcb();
}
else if(cmpP2S(userCommand, "help_block")==1){
handler_help_function("block");
}
else if(cmpP2S(userCommand, "block")==1){
handler_block();
}
else if(cmpP2S(userCommand, "help_unblock")==1){
handler_help_function("unblock");
}
else if(cmpP2S(userCommand, "unblock")==1){
handler_unblock();
}
else if(cmpP2S(userCommand, "help_suspend")==1){
handler_help_function("suspend");
}
else if(cmpP2S(userCommand, "suspend")==1){
handler_suspend();
}
else if(cmpP2S(userCommand, "help_resume")==1){
handler_help_function("resume");
}
else if(cmpP2S(userCommand, "resume")==1){
handler_resume();
}
else if(cmpP2S(userCommand, "help_set_priority")==1){
handler_help_function("set_priority");
}
else if(cmpP2S(userCommand, "set_priority")==1){
handler_set_priority();
}
else if(cmpP2S(userCommand, "help_show_pcb")==1){
handler_help_function("show_pcb");
}
else if(cmpP2S(userCommand, "show_pcb")==1){
handler_show_pcb();
}
else if(cmpP2S(userCommand, "help_show_all")==1){
handler_help_function("show_all");
}
else if(cmpP2S(userCommand, "show_all")==1){
handler_show(0);
}
else if(cmpP2S(userCommand, "help_show_ready")==1){
handler_help_function("show_ready");
}
else if(cmpP2S(userCommand, "show_ready")==1){
handler_show(4);
handler_show(6);
}
else if(cmpP2S(userCommand, "help_show_blocked")==1){
handler_help_function("show_blocked");
}
else if(cmpP2S(userCommand, "show_blocked")==1){
handler_show(5);
handler_show(7);
}
else {
printf("Invalid Command.\n");
}//end if - Decision
}//end while
displayClosing(); //2.2.4 Display closing message
commandCleanup(); //2.2.5 Cleanup Allocated Memory
keyboardInput(0);
sys_exit(); //2.2.6 Return to host system
}