bin: compile lttng-sessiond as C++

[lttng-tools.git] / src / common / dynamic-buffer.h

diff --git a/src/common/dynamic-buffer.h b/src/common/dynamic-buffer.h
index d05356b73a2d8c2d002861011b1fb08d0dee4c6d..d4813fa3919b6c3d43dc536d308368f8f186b837 100644 (file)
--- a/src/common/dynamic-buffer.h
+++ b/src/common/dynamic-buffer.h
@@ -1,18 +1,8 @@
 /*
- * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License, version 2.1 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: LGPL-2.1-only
  *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef LTTNG_DYNAMIC_BUFFER_H
@@ -20,6 +10,13 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <common/macros.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct lttng_buffer_view;
 
 struct lttng_dynamic_buffer {
        char *data;
@@ -52,11 +49,19 @@ int lttng_dynamic_buffer_append(struct lttng_dynamic_buffer *buffer,
  * of "len".
  */
 int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
-               struct lttng_dynamic_buffer *src_buffer);
+               const struct lttng_dynamic_buffer *src_buffer);
+
+/*
+ * Performs the same action as lttng_dynamic_buffer_append(), but using a
+ * buffer view as the source buffer. The source buffer's size is used in lieu
+ * of "len".
+ */
+int lttng_dynamic_buffer_append_view(struct lttng_dynamic_buffer *buffer,
+               const struct lttng_buffer_view *view);
 
 /*
  * Set the buffer's size to new_size. The capacity of the buffer will
- * be expanded (if necessary) to accomodate new_size. Areas acquired by
+ * be expanded (if necessary) to accommodates new_size. Areas acquired by
  * a size increase will be zeroed.
  *
  * Be careful to expand the buffer's size _before_ calling out external
@@ -74,7 +79,7 @@ int lttng_dynamic_buffer_set_size(struct lttng_dynamic_buffer *buffer,
                size_t new_size);
 
 /*
- * Set the buffer's capacity to accomodate the new_capacity, allocating memory
+ * Set the buffer's capacity to accommodates the new_capacity, allocating memory
  * as necessary. The buffer's content is preserved. Setting a buffer's capacity
  * is meant as a _hint_ to the underlying buffer and is only optimization; no
  * guarantee is offered that subsequent calls to append or set_size will succeed.
@@ -87,4 +92,12 @@ int lttng_dynamic_buffer_set_capacity(struct lttng_dynamic_buffer *buffer,
 /* Release any memory used by the dynamic buffer. */
 void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer);
 
+/* Get the space left in the buffer before a new resize is needed. */
+size_t lttng_dynamic_buffer_get_capacity_left(
+               struct lttng_dynamic_buffer *buffer);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* LTTNG_DYNAMIC_BUFFER_H */