dlugolecki.net.pl
Dziennik
Polecane
Software
projects
/
wsti_so.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
Turn On/Off pids on notifying other processes.
[wsti_so.git]
/
src
/
process3.c
diff --git
a/src/process3.c
b/src/process3.c
index a012f4c5616dd525826c03dbbe6cc33723ebde96..1357c91b5ab5bedd439948ac3a8c9780abe128e6 100644
(file)
--- a/
src/process3.c
+++ b/
src/process3.c
@@
-35,7
+35,8
@@
key_t shmkey = 18912;
int shmid;
/**
int shmid;
/**
- * Message shared by processes. Contains array of process IDs
+ * Structure holding array of process IDs.
+ * Message is shared by processes. Contains array of process IDs
*/
struct message {
pid_t pids[3];
*/
struct message {
pid_t pids[3];
@@
-44,14
+45,24
@@
struct message {
struct message * processes = NULL;
/**
struct message * processes = NULL;
/**
- * Message
q
ueue variables
+ * Message
Q
ueue variables
*/
*/
-key_t qkey;
-int qid_input;
-int qid_output1;
-int qid_output2;
+/**
+ * Unique key of message queue.
+ */
+key_t qkey = 12356;
+
+/**
+ * Queue descriptor.
+ */
+int qid;
+/**
+ * Structure holding queue message data.
+ * Parameter mtype describes process to whom message is sent.
+ * Parameter signo is a signal to raise after getting message.
+ */
struct queue_message {
long mtype;
int signo[1];
struct queue_message {
long mtype;
int signo[1];
@@
-68,7
+79,7
@@
void notify_other_processes(int signo) {
if (i != 2 && pid != 0) {
msg.mtype = i+1;
fprintf(stderr, "[%s] Sending message of type (%d) with value %d\n", "process3", msg.mtype, msg.signo[0]);
if (i != 2 && pid != 0) {
msg.mtype = i+1;
fprintf(stderr, "[%s] Sending message of type (%d) with value %d\n", "process3", msg.mtype, msg.signo[0]);
- msgsnd(
p
id, &msg, sizeof(int), 0);
+ msgsnd(
q
id, &msg, sizeof(int), 0);
fprintf(stderr, "[%s] Sending signal %s (%d) to PID: %d\n", "process3", strsignal(SIGUSR1), SIGUSR1, pid);
kill(pid, SIGUSR1);
}
fprintf(stderr, "[%s] Sending signal %s (%d) to PID: %d\n", "process3", strsignal(SIGUSR1), SIGUSR1, pid);
kill(pid, SIGUSR1);
}
@@
-80,20
+91,14
@@
void notify_other_processes(int signo) {
*/
void sig_handler(int signo)
{
*/
void sig_handler(int signo)
{
- fprintf(stderr, "[%s] Received
!\n", "process3"
);
+ fprintf(stderr, "[%s] Received
%s!\n", "process3", strsignal(signo)
);
if (signo == SIGUSR1) {
fprintf(stderr, "[%s] > Notified!\n", "process3");
struct queue_message msg;
/* Check queues from both other processes */
if (signo == SIGUSR1) {
fprintf(stderr, "[%s] > Notified!\n", "process3");
struct queue_message msg;
/* Check queues from both other processes */
- if (msgrcv(
processes->pids[0]
, &msg, sizeof(int), 3, 0) > 0) {
+ if (msgrcv(
qid
, &msg, sizeof(int), 3, 0) > 0) {
fprintf(stderr, "[%s] > Notified with value: %s!\n", "process3", strsignal(msg.signo[0]));
raise(msg.signo[0]);
fprintf(stderr, "[%s] > Notified with value: %s!\n", "process3", strsignal(msg.signo[0]));
raise(msg.signo[0]);
- break;
- }
- else if (msgrcv(processes->pids[1], &msg, sizeof(int), 3, 0) > 0) {
- fprintf(stderr, "[%s] > Notified with value: %s!\n", "process3", strsignal(msg.signo[0]));
- raise(msg.signo[0]);
- break;
}
}
else if (signo == SIGTERM) {
}
}
else if (signo == SIGTERM) {
@@
-107,7
+112,10
@@
void sig_handler(int signo)
}
else if (signo == SIGTSTP) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
}
else if (signo == SIGTSTP) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
+ processes->pids[2] = 0;
notify_other_processes(signo);
notify_other_processes(signo);
+// sleep(1);
+ processes->pids[2] = getpid();
fprintf(stderr, "[%s] > Closing pipe\n", "process3");
close(read_descriptor);
fprintf(stderr, "[%s] > Closing pipe\n", "process3");
close(read_descriptor);
@@
-115,7
+123,10
@@
void sig_handler(int signo)
}
else if (signo == SIGCONT) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
}
else if (signo == SIGCONT) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
+ processes->pids[2] = 0;
notify_other_processes(signo);
notify_other_processes(signo);
+// sleep(1);
+ processes->pids[2] = getpid();
fprintf(stderr, "[%s] > Opening pipe\n", "process3");
read_descriptor = open(read_pipe, O_RDONLY);
fprintf(stderr, "[%s] > Opening pipe\n", "process3");
read_descriptor = open(read_pipe, O_RDONLY);
@@
-165,11
+176,7
@@
int main(void) {
/**
* Register message queue to communicate with other processes
*/
/**
* Register message queue to communicate with other processes
*/
- qkey = getpid();
- qid_input = msgget(qkey, IPC_CREAT | 0666);
-
- qid_output1 = msgget(processes->pids[1], IPC_CREAT | 0666);
- qid_output2 = msgget(processes->pids[2], IPC_CREAT | 0666);
+ qid = msgget(qkey, 0666);
/* Reading from process2 */
read_descriptor = open(read_pipe, O_RDONLY);
/* Reading from process2 */
read_descriptor = open(read_pipe, O_RDONLY);