void loop() {
clock_update();
if(pulse_100ms){
main_prev_millis=millis();
main_period_actual=millis()-main_period_prev_millis;
main_period_prev_millis=millis();
if(main_period_actual>main_period_max)
main_period_max=main_period_actual;
//~ Serial.print("1");
/* recupere les valeurs des cartes d'entrees si changement détecté*/
if(NumberOfBoardIn4Dimmer4 && !digitalRead(int_i2c))
BoardIn4Dimmer4_pre();
if(NumberOfBoardIn16 && !digitalRead(int_i2c))
BoardIn16_pre();
if(NumberOfBoardIn8R8 && !digitalRead(int_i2c))
BoardIn8R8_pre();
if(NumberOfRFDevice)
RFDevice_pre();
/* update all the preliminary condition */
pre_update(); // cf custom.ino
scenario(); // cf custom.ino
/* update the status of the shutters */
if (NumberOfShutter)
shutter_post();
/* update the post conditions */
post_update(); // cf custom.ino
/* update the output of the boards */
if(NumberOfBoardIn4Dimmer4)
BoardIn4Dimmer4_post();
if(NumberOfBoardR8)
BoardR8_post();
if(NumberOfBoardIn8R8)
BoardIn8R8_post();
if(NumberOfRFDevice)
RFDevice_post();
main_actual=millis()-main_prev_millis;
if(main_actual>main_max)
main_max=main_actual;
digitalWrite(STATUS_LED, LOW);
/**/
}
other_prev_millis=millis();
if(pulse_1000ms){
hbeat++;
RTC.getTime(); /// update time should be every 500ms or 1s
if(NumberOfBoardIn4Dimmer4)
BoardIn4Dimmer4_hbeat();
if(NumberOfBoardIn8R8)
BoardIn8R8_hbeat();
if(NumberOfBoardIn16)
BoardIn16_hbeat();
if(NumberOfBoardR8)
BoardR8_hbeat();
#ifdef WITH_LIGHTING
if (NumberOfLighting)
lighting_hard_status();
#endif
//~ Serial.print("1");
if(NumberOfShutter)
shutter_hard_status();
//~ Serial.print("2");
if(NumberOfTemp){
//~ Serial.print("3");
Read_DS2482_Temp(true); //lecture des temperature sur les sodes OneWire en mode seconde
}
temperature_sendXPL(); /// temporaire
TeleInfo.read();
}
if(pulse_1mn){
if(minutes == 59){
minutes =0;
heure++;
}else{
minutes++;
}
TeleInfoSendXPL(); //envois de toutes les trame OneWire en XPL
}
loop_Udp();
runBitlash();
other_actual=millis()-other_prev_millis;
//~ other_prev_millis=millis();
if(other_actual>other_max)
other_max=other_actual;
}
int main(int argc, char** argv) {
const char true = 1;
const char false = 0;
const int kMaxReadLength = sizeof(StudentSt);
char read_buf[kMaxReadLength];
char peer_server[32] = "";
int listen_updategrade_pid;
int listen_lookupgrade_pid;
int listen_mainupdate_pid;
char has_new = 0; //whether has new updates to backup
int syncfail_count = 0;
int update_count = 0; //primary fails after three updates, this is the counter.
//check argument validity
if(argc != 3) {
printf("Usage: server [mode] peer_server_address\n");
printf("mode=p: primary \t mode=b:backup\n");
return 0;
}
//address of the peer server
strcpy(peer_server, argv[2]);
switch(argv[1][0]) {
case 'p':
break;
case 'b':
i_know_its_dirty:
if((listen_mainupdate_pid = fork()) == 0) {
//in child process
listen_mainserver_update();
}
else {
//in main process
listen_mainserver_failure();
kill(listen_mainupdate_pid, SIGKILL);
printf("My turn to become primary!\n");
}
printf("-----------Main server fail detected-----------\n");
printf("Switched to main server mode\n");
break;
default:
printf("Usage: server [mode]\n");
printf("mode=:m primary \t mode=b:backup\n");
return 0;
}
if(pipe(pipe_fd) < 0) {
printf("not able to create pipe\n");
return -1;
}
//int flags;
//set pipe to be non-blocking
if(fcntl(pipe_fd[0], F_SETFL, O_NONBLOCK) < 0) {
printf("not able to set pipe props\n");
return -1;
}
if((listen_updategrade_pid = fork()) == 0) {
//in child, process 1
listen_client_update();
} else if((listen_lookupgrade_pid = fork()) == 0) {
//in child, process 2
listen_client_lookup();
} else {
//in parent
//first student in list
StudentSt *student_list = NULL;
//last student in un-backuped student list
//need this one if sync fails, and some new updates from client
StudentSt *current_student = NULL;
while(1) {
while( read(pipe_fd[0], read_buf, kMaxReadLength) >0 ) {
//client sent some update requests
//printf("new data in pipe detected\ndata:%3d\n",(int) (*read_buf));
has_new = true;
if(!current_student){ //no students in list
current_student = (StudentSt*)malloc(sizeof(StudentSt));
student_list = current_student;
} else { //list non-emtpy, append
current_student->next = (StudentSt*)malloc(sizeof(StudentSt));
current_student = current_student->next;
}
current_student->next = NULL;
//read_buf is in fact a StudentSt
current_student->student_id = ((StudentSt*)read_buf)->student_id;
current_student->grade = ((StudentSt*)read_buf)->grade;
//debug
//printf("new arrival: id: %d grade: %c\n",
// current_student->student_id,
// current_student->grade);
} //inner while ends
if(has_new) {
//needs to sync to bakcup
if(post_update("localhost", student_list)) {
//sync successful, cleanup
FreeStudentList(student_list);
has_new = false;
student_list = NULL;
current_student = NULL;
printf("updates sync-ed with bakcup server\n");
update_count++;
if(update_count >= 3) {
update_count = 0;
syncfail_count = 0; //will become backup, reset counters
kill(listen_lookupgrade_pid, SIGKILL);
kill(listen_updategrade_pid, SIGKILL);
post_failure(peer_server);
close(pipe_fd[0]);
close(pipe_fd[1]);
printf("Primary server says goodbye to the evil world.\n\n");
printf("Restarting as backup\n");
printf("Recovering..........Takes 30 secs.\n");
sleep(30);
printf("I'm here as the bakcup!\n");
printf("--------------------------------------------\n\n");
goto i_know_its_dirty;
exit(0);//not reached
}
} else {
//sync failed, pass~will retry next time
//retry limit is 3. After that, save the update for next time
syncfail_count ++;
if(syncfail_count >= 3) {
//limit reached
printf("Backup server seems unreachable at the moment.\n");
has_new = false;
syncfail_count = 0;
}
}
}
}
}
}