1 files changed, 38 insertions, 0 deletions
diff --git a/trace2/tr2_dst.h b/trace2/tr2_dst.h
new file mode 100644
index 0000000000..b1a8c144e0
--- /dev/null
+++ b/trace2/tr2_dst.h
@@ -0,0 +1,38 @@
+#ifndef TR2_DST_H
+#define TR2_DST_H
+
+struct strbuf;
+#include "trace2/tr2_sysenv.h"
+
+struct tr2_dst {
+	enum tr2_sysenv_variable sysenv_var;
+	int fd;
+	unsigned int initialized : 1;
+	unsigned int need_close : 1;
+	unsigned int too_many_files : 1;
+};
+
+/*
+ * Disable TRACE2 on the destination.  In TRACE2 a destination (DST)
+ * wraps a file descriptor; it is associated with a TARGET which
+ * defines the formatting.
+ */
+void tr2_dst_trace_disable(struct tr2_dst *dst);
+
+/*
+ * Return the file descriptor for the DST.
+ * If 0, the dst is closed or disabled.
+ */
+int tr2_dst_get_trace_fd(struct tr2_dst *dst);
+
+/*
+ * Return true if the DST is opened for writing.
+ */
+int tr2_dst_trace_want(struct tr2_dst *dst);
+
+/*
+ * Write a single line/message to the trace file.
+ */
+void tr2_dst_write_line(struct tr2_dst *dst, struct strbuf *buf_line);
+
+#endif /* TR2_DST_H */