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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 28ecce5dcb6b4076c56447d2d9d1f8a3260e0f40..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];
@@
-44,11
+45,24
@@
struct message {
struct message * processes = NULL;
/**
struct message * processes = NULL;
/**
- * Message queue variables
+ * Message Queue variables
+ */
+
+/**
+ * Unique key of message queue.
*/
key_t qkey = 12356;
*/
key_t qkey = 12356;
+
+/**
+ * Queue descriptor.
+ */
int qid;
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];
@@
-86,10
+100,6
@@
void sig_handler(int signo)
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]);
}
- else 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]);
- }
}
else if (signo == SIGTERM) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
}
else if (signo == SIGTERM) {
fprintf(stderr, "[%s] > Signalling other processes..\n", "process3");
@@
-102,7
+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);
@@
-110,7
+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);