bin: compile lttng-sessiond as C++

[lttng-tools.git] / src / bin / lttng-sessiond / utils.cpp

diff --git a/src/bin/lttng-sessiond/utils.cpp b/src/bin/lttng-sessiond/utils.cpp
new file mode 100644 (file)
index 0000000..6936a03
--- /dev/null
+++ b/src/bin/lttng-sessiond/utils.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#define _LGPL_SOURCE
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <common/error.h>
+
+#include "utils.h"
+#include "snapshot.h"
+#include "lttng-sessiond.h"
+
+int the_ht_cleanup_pipe[2] = {-1, -1};
+
+/*
+ * Write to writable pipe used to notify a thread.
+ */
+int notify_thread_pipe(int wpipe)
+{
+       ssize_t ret;
+
+       /* Ignore if the pipe is invalid. */
+       if (wpipe < 0) {
+               return 0;
+       }
+
+       ret = lttng_write(wpipe, "!", 1);
+       if (ret < 1) {
+               PERROR("write poll pipe");
+       }
+
+       return (int) ret;
+}
+
+void ht_cleanup_push(struct lttng_ht *ht)
+{
+       ssize_t ret;
+       int fd = the_ht_cleanup_pipe[1];
+
+       if (!ht) {
+               return;
+       }
+       if (fd < 0)
+               return;
+       ret = lttng_write(fd, &ht, sizeof(ht));
+       if (ret < sizeof(ht)) {
+               PERROR("write ht cleanup pipe %d", fd);
+               if (ret < 0) {
+                       ret = -errno;
+               }
+               goto error;
+       }
+
+       /* All good. Don't send back the write positive ret value. */
+       ret = 0;
+error:
+       LTTNG_ASSERT(!ret);
+}
+
+int loglevels_match(int a_loglevel_type, int a_loglevel_value,
+       int b_loglevel_type, int b_loglevel_value, int loglevel_all_type)
+{
+       int match = 1;
+
+       if (a_loglevel_type == b_loglevel_type) {
+               /* Same loglevel type. */
+               if (b_loglevel_type != loglevel_all_type) {
+                       /*
+                        * Loglevel value must also match since the loglevel
+                        * type is not all.
+                        */
+                       if (a_loglevel_value != b_loglevel_value) {
+                               match = 0;
+                       }
+               }
+       } else {
+               /* Loglevel type is different: no match. */
+               match = 0;
+       }
+
+       return match;
+}
+
+const char *session_get_base_path(const struct ltt_session *session)
+{
+       return consumer_output_get_base_path(session->consumer);
+}
+
+const char *consumer_output_get_base_path(const struct consumer_output *output)
+{
+       return output->type == CONSUMER_DST_LOCAL ?
+                       output->dst.session_root_path :
+                       output->dst.net.base_dir;
+}