Init commit of jobs output/error message peek project.

src/lib/mylock.c

@@ -187,6 +187,32 @@ int cbuf_tryget(cbuf_t* b, void* it)
     return rc;
 }
 
+int cbuf_timedget(cbuf_t* b, void* it, const struct timespec* deadline)
+{
+    if ((b == NULL) || (it == NULL) || (deadline == NULL)) {
+        return -EINVAL;
+    }
+
+    pthread_mutex_lock(&(b->mutex));
+    while (b->len == 0) {
+        int rc = pthread_cond_timedwait(&(b->condget), &(b->mutex), deadline);
+        if (rc == ETIMEDOUT) {
+            pthread_mutex_unlock(&(b->mutex));
+            return -ETIMEDOUT;
+        }
+    }
+
+    memcpy(it, (void*)((char*)b->data) + b->isize * b->head, b->isize);
+
+    b->head = (b->head + 1) % b->ncap;
+    b->len--;
+
+    pthread_cond_signal(&(b->condput));
+
+    pthread_mutex_unlock(&(b->mutex));
+    return 0;
+}
+
 int my_rwlock_init(my_rwlock_t* l)
 {
     if (l == NULL) {