buffer: add buffer_init
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1446203414-4013-3-git-send-email-kraxel@redhat.com
diff --git a/include/qemu/buffer.h b/include/qemu/buffer.h
index b380cec..0710e16 100644
--- a/include/qemu/buffer.h
+++ b/include/qemu/buffer.h
@@ -34,12 +34,24 @@
*/
struct Buffer {
+ char *name;
size_t capacity;
size_t offset;
uint8_t *buffer;
};
/**
+ * buffer_init:
+ * @buffer: the buffer object
+ * @name: buffer name
+ *
+ * Optionally attach a name to the buffer, to make it easier
+ * to identify in debug traces.
+ */
+void buffer_init(Buffer *buffer, const char *name, ...)
+ GCC_FMT_ATTR(2, 3);
+
+/**
* buffer_reserve:
* @buffer: the buffer object
* @len: the minimum required free space
diff --git a/util/buffer.c b/util/buffer.c
index 7ddd693..12bf2d7 100644
--- a/util/buffer.c
+++ b/util/buffer.c
@@ -22,6 +22,15 @@
#define BUFFER_MIN_INIT_SIZE 4096
+void buffer_init(Buffer *buffer, const char *name, ...)
+{
+ va_list ap;
+
+ va_start(ap, name);
+ buffer->name = g_strdup_vprintf(name, ap);
+ va_end(ap);
+}
+
void buffer_reserve(Buffer *buffer, size_t len)
{
if ((buffer->capacity - buffer->offset) < len) {
@@ -49,9 +58,11 @@
void buffer_free(Buffer *buffer)
{
g_free(buffer->buffer);
+ g_free(buffer->name);
buffer->offset = 0;
buffer->capacity = 0;
buffer->buffer = NULL;
+ buffer->name = NULL;
}
void buffer_append(Buffer *buffer, const void *data, size_t len)
