common: compile libcommon as C++

[lttng-tools.git] / src / common / payload.cpp

diff --git a/src/common/payload.cpp b/src/common/payload.cpp
new file mode 100644 (file)
index 0000000..0097e65
--- /dev/null
+++ b/src/common/payload.cpp
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include "payload.h"
+#include <common/dynamic-array.h>
+#include <common/dynamic-buffer.h>
+#include <common/error.h>
+
+static
+void release_fd_handle_ref(void *ptr)
+{
+       struct fd_handle *fd_handle = (struct fd_handle *) ptr;
+
+       fd_handle_put(fd_handle);
+}
+
+void lttng_payload_init(struct lttng_payload *payload)
+{
+       LTTNG_ASSERT(payload);
+       lttng_dynamic_buffer_init(&payload->buffer);
+       lttng_dynamic_pointer_array_init(&payload->_fd_handles,
+                       release_fd_handle_ref);
+}
+
+int lttng_payload_copy(const struct lttng_payload *src_payload,
+                      struct lttng_payload *dst_payload)
+{
+       int ret;
+       size_t i;
+
+       ret = lttng_dynamic_buffer_append_buffer(
+                       &dst_payload->buffer, &src_payload->buffer);
+       if (ret) {
+               goto end;
+       }
+
+       for (i = 0; i < lttng_dynamic_pointer_array_get_count(
+                                       &src_payload->_fd_handles);
+                       i++) {
+               struct fd_handle *new_fd_handle;
+               const struct fd_handle *src_fd_handle =
+                               (fd_handle *) lttng_dynamic_pointer_array_get_pointer(
+                                               &src_payload->_fd_handles, i);
+
+               new_fd_handle = fd_handle_copy(src_fd_handle);
+               if (!new_fd_handle) {
+                       PERROR("Failed to copy fd_handle while copying a payload");
+                       ret = -1;
+                       goto end;
+               }
+
+               ret = lttng_payload_push_fd_handle(dst_payload, new_fd_handle);
+               fd_handle_put(new_fd_handle);
+               if (ret) {
+                       goto end;
+               }
+       }
+
+end:
+       return ret;
+}
+
+void lttng_payload_reset(struct lttng_payload *payload)
+{
+       if (!payload) {
+               return;
+       }
+
+       lttng_dynamic_buffer_reset(&payload->buffer);
+       lttng_dynamic_pointer_array_reset(&payload->_fd_handles);
+}
+
+void lttng_payload_clear(struct lttng_payload *payload)
+{
+       (void) lttng_dynamic_buffer_set_size(&payload->buffer, 0);
+       lttng_dynamic_pointer_array_clear(&payload->_fd_handles);
+}
+
+int lttng_payload_push_fd_handle(struct lttng_payload *payload,
+               struct fd_handle *fd_handle)
+{
+       int ret;
+
+       if (!payload) {
+               ret = -1;
+               goto end;
+       }
+
+       ret = lttng_dynamic_pointer_array_add_pointer(
+                       &payload->_fd_handles, fd_handle);
+       if (ret) {
+               goto end;
+       }
+
+       fd_handle_get(fd_handle);
+end:
+       return ret;
+}