3 files changed, 95 insertions, 0 deletions
diff --git a/libnetdata/completion/Makefile.am b/libnetdata/completion/Makefile.am
new file mode 100644
index 00000000..babdcf0d
--- /dev/null
+++ b/libnetdata/completion/Makefile.am
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+AUTOMAKE_OPTIONS = subdir-objects
+MAINTAINERCLEANFILES = $(srcdir)/Makefile.in
diff --git a/libnetdata/completion/completion.c b/libnetdata/completion/completion.c
new file mode 100644
index 00000000..6257e029
--- /dev/null
+++ b/libnetdata/completion/completion.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "completion.h"
+
+void completion_init(struct completion *p)
+{
+    p->completed = 0;
+    p->completed_jobs = 0;
+    fatal_assert(0 == uv_cond_init(&p->cond));
+    fatal_assert(0 == uv_mutex_init(&p->mutex));
+}
+
+void completion_destroy(struct completion *p)
+{
+    uv_cond_destroy(&p->cond);
+    uv_mutex_destroy(&p->mutex);
+}
+
+void completion_wait_for(struct completion *p)
+{
+    uv_mutex_lock(&p->mutex);
+    while (0 == p->completed) {
+        uv_cond_wait(&p->cond, &p->mutex);
+    }
+    fatal_assert(1 == p->completed);
+    uv_mutex_unlock(&p->mutex);
+}
+
+void completion_mark_complete(struct completion *p)
+{
+    uv_mutex_lock(&p->mutex);
+    p->completed = 1;
+    uv_cond_broadcast(&p->cond);
+    uv_mutex_unlock(&p->mutex);
+}
+
+unsigned completion_wait_for_a_job(struct completion *p, unsigned completed_jobs)
+{
+    uv_mutex_lock(&p->mutex);
+    while (0 == p->completed && p->completed_jobs <= completed_jobs) {
+        uv_cond_wait(&p->cond, &p->mutex);
+    }
+    completed_jobs = p->completed_jobs;
+    uv_mutex_unlock(&p->mutex);
+
+    return completed_jobs;
+}
+
+void completion_mark_complete_a_job(struct completion *p)
+{
+    uv_mutex_lock(&p->mutex);
+    p->completed_jobs++;
+    uv_cond_broadcast(&p->cond);
+    uv_mutex_unlock(&p->mutex);
+}
+
+bool completion_is_done(struct completion *p)
+{
+    bool ret;
+    uv_mutex_lock(&p->mutex);
+    ret = p->completed;
+    uv_mutex_unlock(&p->mutex);
+    return ret;
+}
diff --git a/libnetdata/completion/completion.h b/libnetdata/completion/completion.h
new file mode 100644
index 00000000..723f7368
--- /dev/null
+++ b/libnetdata/completion/completion.h
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_COMPLETION_H
+#define NETDATA_COMPLETION_H
+
+#include "../libnetdata.h"
+
+struct completion {
+    uv_mutex_t mutex;
+    uv_cond_t cond;
+    volatile unsigned completed;
+    volatile unsigned completed_jobs;
+};
+
+void completion_init(struct completion *p);
+
+void completion_destroy(struct completion *p);
+
+void completion_wait_for(struct completion *p);
+
+void completion_mark_complete(struct completion *p);
+
+unsigned completion_wait_for_a_job(struct completion *p, unsigned completed_jobs);
+void completion_mark_complete_a_job(struct completion *p);
+bool completion_is_done(struct completion *p);
+
+#endif /* NETDATA_COMPLETION_H */