graph export timer for manynodes example

diff --git a/examples/manynodes.c b/examples/manynodes.c
index 3b617e4e5b517d7af0a0c33eeccf5cf249afa130..3215cfccd1f7fbf97f3d656225e20455036da895 100644 (file)
--- a/examples/manynodes.c
+++ b/examples/manynodes.c
@@ -13,6 +13,9 @@
 #include <sys/stat.h>
 #include <errno.h>
 
+#include <sys/time.h>
+#include <signal.h>
+
 static int n = 10;
 static meshlink_handle_t **mesh;
 
@@ -101,6 +104,73 @@ static bool exportmeshgraph(const char* path)
        return true;
 }
 
+
+void exportmeshgraph_timer(int signum)
+{
+       struct timeval ts;
+       gettimeofday(&ts, NULL);
+
+       char name[1024];
+       snprintf(name, sizeof(name), "graph_%ld_%ld.json", ts.tv_sec, ts.tv_usec/1000);
+
+       exportmeshgraph(name);
+}
+
+static bool exportmeshgraph_started = false;
+
+static bool exportmeshgraph_end(const char* none)
+{
+       if(!exportmeshgraph_started)
+               { return false; }
+
+       struct itimerval zero_timer = { 0 };
+       setitimer (ITIMER_REAL, &zero_timer, NULL);
+
+       exportmeshgraph_started = false;
+
+       return true;
+}
+
+static bool exportmeshgraph_begin(const char* timeout_str)
+{
+       if(!timeout_str)
+               return false;
+
+       if(exportmeshgraph_started)
+       {
+               if(!exportmeshgraph_end(NULL))
+                       return false;
+       }
+
+       // get timeout
+       int timeout = atoi(timeout_str);
+
+       if(timeout < 100)
+               { timeout = 100; }
+
+       int timeout_sec = timeout / 1000;
+       int timeout_msec = timeout % 1000;
+
+       /* Install timer_handler as the signal handler for SIGALRM. */
+       signal(SIGALRM, exportmeshgraph_timer);
+
+       /* Configure the timer to expire after X msec... */
+       struct itimerval timer;
+       timer.it_value.tv_sec = timeout_sec;
+       timer.it_value.tv_usec = timeout_msec * 1000;
+
+       /* ... and every X msec after that. */
+       timer.it_interval.tv_sec = timeout_sec;
+       timer.it_interval.tv_usec = timeout_msec * 1000;
+
+       /* Start a real timer. */
+       setitimer (ITIMER_REAL, &timer, NULL);
+
+       exportmeshgraph_started = true;
+
+       return true;
+}
+
 static void parse_command(char *buf) {
        char *arg = strchr(buf, ' ');
        if(arg)
@@ -172,6 +242,10 @@ static void parse_command(char *buf) {
                linkmesh();
        } else if(!strcasecmp(buf, "eg")) {
                exportmeshgraph(arg);
+       } else if(!strcasecmp(buf, "egb")) {
+               exportmeshgraph_begin(arg);
+       } else if(!strcasecmp(buf, "ege")) {
+               exportmeshgraph_end(NULL);
        } else if(!strcasecmp(buf, "test")) {
                testmesh();
        } else if(!strcasecmp(buf, "quit")) {
@@ -274,7 +348,7 @@ int main(int argc, char *argv[]) {
 
        mesh = calloc(n, sizeof *mesh);
 
-       meshlink_set_log_cb(NULL, MESHLINK_INFO, log_message);
+       meshlink_set_log_cb(NULL, MESHLINK_WARNING, log_message);
        mkdir(basebase, 0750);
 
        char filename[PATH_MAX];
@@ -284,7 +358,7 @@ int main(int argc, char *argv[]) {
                snprintf(filename, sizeof filename, "%s/%s", basebase, nodename);
                bool itsnew = access(filename, R_OK);
                mesh[i] = meshlink_open(filename, nodename, "manynodes", i%_DEV_CLASS_MAX);
-               meshlink_set_log_cb(mesh[i], MESHLINK_INFO, log_message);
+               meshlink_set_log_cb(mesh[i], MESHLINK_WARNING, log_message);
                if(itsnew)
                        meshlink_add_address(mesh[i], "localhost");
                if(!mesh[i]) {
@@ -310,6 +384,7 @@ int main(int argc, char *argv[]) {
 
        printf("%d nodes started.\nType /help for a list of commands.\n", started);
 
+       // handle input
        while(fgets(buf, sizeof buf, stdin))
                parse_input(buf);