common: compile libcommon as C++

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

diff --git a/src/common/dynamic-buffer.c b/src/common/dynamic-buffer.c
deleted file mode 100644 (file)
index d6ad674..0000000
--- a/src/common/dynamic-buffer.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include <common/dynamic-buffer.h>
-#include <common/buffer-view.h>
-#include <common/utils.h>
-
-/*
- * Round to (upper) power of two, val is returned if it already is a power of
- * two.
- */
-static
-size_t round_to_power_of_2(size_t val)
-{
-       size_t rounded;
-       const int order = utils_get_count_order_u64(val);
-
-       LTTNG_ASSERT(order >= 0);
-       rounded = (1ULL << order);
-       LTTNG_ASSERT(rounded >= val);
-
-       return rounded;
-}
-
-void lttng_dynamic_buffer_init(struct lttng_dynamic_buffer *buffer)
-{
-       LTTNG_ASSERT(buffer);
-       memset(buffer, 0, sizeof(*buffer));
-}
-
-int lttng_dynamic_buffer_append(struct lttng_dynamic_buffer *buffer,
-               const void *buf, size_t len)
-{
-       int ret = 0;
-
-       if (!buffer || (!buf && len)) {
-               ret = -1;
-               goto end;
-       }
-
-       if (len == 0) {
-               /* Not an error, no-op. */
-               goto end;
-       }
-
-       LTTNG_ASSERT(buffer->_capacity >= buffer->size);
-       if (buffer->_capacity < (len + buffer->size)) {
-               ret = lttng_dynamic_buffer_set_capacity(buffer,
-                               buffer->_capacity +
-                               (len - (buffer->_capacity - buffer->size)));
-               if (ret) {
-                       goto end;
-               }
-       }
-
-       memcpy(buffer->data + buffer->size, buf, len);
-       buffer->size += len;
-end:
-       return ret;
-}
-
-int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
-               const struct lttng_dynamic_buffer *src_buffer)
-{
-       int ret;
-
-       if (!dst_buffer || !src_buffer) {
-               ret = -1;
-               goto end;
-       }
-
-       ret = lttng_dynamic_buffer_append(dst_buffer, src_buffer->data,
-                       src_buffer->size);
-end:
-       return ret;
-}
-
-int lttng_dynamic_buffer_append_view(struct lttng_dynamic_buffer *buffer,
-               const struct lttng_buffer_view *src)
-{
-       int ret;
-
-       if (!buffer || !src) {
-               ret = -1;
-               goto end;
-       }
-
-       ret = lttng_dynamic_buffer_append(buffer, src->data,
-                       src->size);
-end:
-       return ret;
-}
-
-int lttng_dynamic_buffer_set_size(struct lttng_dynamic_buffer *buffer,
-               size_t new_size)
-{
-       int ret = 0;
-
-       if (!buffer) {
-               goto end;
-       }
-
-       if (new_size == buffer->size) {
-               goto end;
-       }
-
-       if (new_size > buffer->_capacity) {
-               ret = lttng_dynamic_buffer_set_capacity(buffer, new_size);
-               if (ret) {
-                       goto end;
-               }
-
-               memset(buffer->data + buffer->size, 0, new_size - buffer->size);
-       } else if (new_size > buffer->size) {
-               memset(buffer->data + buffer->size, 0, new_size - buffer->size);
-       } else {
-               /*
-                * Shrinking size. There is no need to zero-out the newly
-                * released memory as it will either be:
-                *   - overwritten by lttng_dynamic_buffer_append,
-                *   - expanded later, which will zero-out the memory
-                *
-                * Users of external APIs are encouraged to set the buffer's
-                * size _before_ making such calls.
-                */
-       }
-
-       buffer->size = new_size;
-end:
-       return ret;
-}
-
-int lttng_dynamic_buffer_set_capacity(struct lttng_dynamic_buffer *buffer,
-               size_t demanded_capacity)
-{
-       int ret = 0;
-       void *new_buf;
-       size_t new_capacity = demanded_capacity ?
-                       round_to_power_of_2(demanded_capacity) : 0;
-
-       if (!buffer || demanded_capacity < buffer->size) {
-               /*
-                * Shrinking a buffer's size by changing its capacity is
-                * unsupported.
-                */
-               ret = -1;
-               goto end;
-       }
-
-       if (new_capacity == buffer->_capacity) {
-               goto end;
-       }
-
-       /* Memory is initialized by the size increases. */
-       new_buf = realloc(buffer->data, new_capacity);
-       if (!new_buf) {
-               ret = -1;
-               goto end;
-       }
-
-       buffer->data = new_buf;
-       buffer->_capacity = new_capacity;
-end:
-       return ret;
-}
-
-/* Release any memory used by the dynamic buffer. */
-void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer)
-{
-       if (!buffer) {
-               return;
-       }
-
-       buffer->size = 0;
-       buffer->_capacity = 0;
-       free(buffer->data);
-       buffer->data = NULL;
-}
-
-size_t lttng_dynamic_buffer_get_capacity_left(
-               struct lttng_dynamic_buffer *buffer)
-{
-       if (!buffer) {
-               return 0;
-       }
-
-       return buffer->_capacity - buffer->size;
-}