Fix: consumer should await for initial streams

[lttng-tools.git] / src / bin / lttng-sessiond / consumer.h

diff --git a/src/bin/lttng-sessiond/consumer.h b/src/bin/lttng-sessiond/consumer.h
index 1337f32ac0e09e29d39cd5612cfc26e0d0d668c1..ec4ef3f3162533be8b0f98880eac41dde943e013 100644 (file)
--- a/src/bin/lttng-sessiond/consumer.h
+++ b/src/bin/lttng-sessiond/consumer.h
@@ -18,8 +18,6 @@
 #ifndef _CONSUMER_H
 #define _CONSUMER_H
 
-#include <semaphore.h>
-
 #include <common/consumer.h>
 #include <common/hashtable/hashtable.h>
 #include <lttng/lttng.h>
@@ -54,7 +52,24 @@ struct consumer_data {
        enum lttng_consumer_type type;
 
        pthread_t thread;       /* Worker thread interacting with the consumer */
-       sem_t sem;
+
+       /* Conditions used by the consumer thread to indicate readiness. */
+       pthread_cond_t cond;
+       pthread_condattr_t condattr;
+       pthread_mutex_t cond_mutex;
+
+       /*
+        * This is a flag condition indicating that the consumer thread is ready
+        * and connected to the lttng-consumerd daemon. This flag MUST only be
+        * updated by locking the condition mutex above or before spawning a
+        * consumer thread.
+        *
+        * A value of 0 means that the thread is NOT ready. A value of 1 means that
+        * the thread consumer did connect successfully to the lttng-consumerd
+        * daemon. A negative value indicates that there is been an error and the
+        * thread has likely quit.
+        */
+       int consumer_thread_is_ready;
 
        /* Mutex to control consumerd pid assignation */
        pthread_mutex_t pid_mutex;
@@ -180,6 +195,7 @@ void consumer_init_channel_comm_msg(struct lttcomm_consumer_msg *msg,
                int channel_key,
                uint64_t max_sb_size,
                uint64_t mmap_len,
-               const char *name);
+               const char *name,
+               unsigned int nb_init_streams);
 
 #endif /* _CONSUMER_H */