move all projects into the trunk directory

[lttv.git] / trunk / ltt-usertrace / sample-thread-fast.c

diff --git a/trunk/ltt-usertrace/sample-thread-fast.c b/trunk/ltt-usertrace/sample-thread-fast.c
new file mode 100644 (file)
index 0000000..46ffbd1
--- /dev/null
+++ b/trunk/ltt-usertrace/sample-thread-fast.c
@@ -0,0 +1,68 @@
+
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#define LTT_TRACE
+#define LTT_TRACE_FAST
+#include <ltt/ltt-facility-user_generic.h>
+
+
+void *thr1(void *arg)
+{
+       int i;
+       ltt_thread_init();      /* This init is not required : it will be done
+                                                                                                automatically anyways at the first tracing call site */
+       printf("thread 1, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+
+       for(i=0; i<100000; i++) {
+               trace_user_generic_string("Hello world! Have a nice day.");
+       }
+       pthread_exit((void*)1);
+}
+
+
+/* Example of a _bad_ thread, which still works with the tracing */
+void *thr2(void *arg)
+{
+       int i;
+       /* See ? no init */
+       printf("thread 2, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+
+       for(i=0; i<100000; i++) {
+               trace_user_generic_string("Hello world! Have a nice day.");
+       }
+       /* This thread is a bad citizen : returning like this will cause its cancel
+        * routines not to be executed. This is still detected by the tracer, but only
+        * when the complete process dies. This is not recommended if you create a
+        * huge amount of threads */
+       return ((void*)2);
+}
+
+
+int main()
+{
+       int err;
+       pthread_t tid1, tid2;
+       void *tret;
+
+       printf("Will trace the following string : Hello world! Have a nice day.\n");
+       printf("It will stop automatically.\n");
+       printf("See the result file in /tmp/ltt-usertrace.\n");
+
+       printf("thread main, thread id : %lu, pid %lu\n", pthread_self(), getpid());
+       err = pthread_create(&tid1, NULL, thr1, NULL);
+       if(err!=0) exit(1);
+
+       err = pthread_create(&tid2, NULL, thr2, NULL);
+       if(err!=0) exit(1);
+
+       err = pthread_join(tid1, &tret);
+       if(err!= 0) exit(1);
+
+       err = pthread_join(tid2, &tret);
+       if(err!= 0) exit(1);
+       
+       return 0;
+}