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Add a util to create a buffer view from a raw buffer
[lttng-tools.git]
/
src
/
common
/
dynamic-buffer.c
diff --git
a/src/common/dynamic-buffer.c
b/src/common/dynamic-buffer.c
index 4f1116213a55dce6ec54be42efec2519f35a280e..cec2f1e608a67d1e0a148c491c8a8015ce5f27dc 100644
(file)
--- a/
src/common/dynamic-buffer.c
+++ b/
src/common/dynamic-buffer.c
@@
-16,7
+16,6
@@
*/
#include <common/dynamic-buffer.h>
*/
#include <common/dynamic-buffer.h>
-#include <common/macros.h>
#include <common/utils.h>
#include <assert.h>
#include <common/utils.h>
#include <assert.h>
@@
-38,12
+37,14
@@
size_t round_to_power_of_2(size_t val)
return rounded;
}
return rounded;
}
+LTTNG_HIDDEN
void lttng_dynamic_buffer_init(struct lttng_dynamic_buffer *buffer)
{
assert(buffer);
memset(buffer, 0, sizeof(*buffer));
}
void lttng_dynamic_buffer_init(struct lttng_dynamic_buffer *buffer)
{
assert(buffer);
memset(buffer, 0, sizeof(*buffer));
}
+LTTNG_HIDDEN
int lttng_dynamic_buffer_append(struct lttng_dynamic_buffer *buffer,
const void *buf, size_t len)
{
int lttng_dynamic_buffer_append(struct lttng_dynamic_buffer *buffer,
const void *buf, size_t len)
{
@@
-75,6
+76,7
@@
end:
return ret;
}
return ret;
}
+LTTNG_HIDDEN
int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
struct lttng_dynamic_buffer *src_buffer)
{
int lttng_dynamic_buffer_append_buffer(struct lttng_dynamic_buffer *dst_buffer,
struct lttng_dynamic_buffer *src_buffer)
{
@@
-91,6
+93,7
@@
end:
return ret;
}
return ret;
}
+LTTNG_HIDDEN
int lttng_dynamic_buffer_set_size(struct lttng_dynamic_buffer *buffer,
size_t new_size)
{
int lttng_dynamic_buffer_set_size(struct lttng_dynamic_buffer *buffer,
size_t new_size)
{
@@
-139,12
+142,14
@@
end:
return ret;
}
return ret;
}
+LTTNG_HIDDEN
int lttng_dynamic_buffer_set_capacity(struct lttng_dynamic_buffer *buffer,
size_t demanded_capacity)
{
int ret = 0;
void *new_buf;
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 = round_to_power_of_2(demanded_capacity);
+ size_t new_capacity = demanded_capacity ?
+ round_to_power_of_2(demanded_capacity) : 0;
if (!buffer || demanded_capacity < buffer->size) {
/*
if (!buffer || demanded_capacity < buffer->size) {
/*
@@
-172,6
+177,7
@@
end:
}
/* Release any memory used by the dynamic buffer. */
}
/* Release any memory used by the dynamic buffer. */
+LTTNG_HIDDEN
void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer)
{
if (!buffer) {
void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer)
{
if (!buffer) {
@@
-181,3
+187,13
@@
void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer)
buffer->_capacity = 0;
free(buffer->data);
}
buffer->_capacity = 0;
free(buffer->data);
}
+
+LTTNG_HIDDEN
+size_t lttng_dynamic_buffer_get_capacity_left(
+ struct lttng_dynamic_buffer *buffer)
+{
+ if (!buffer) {
+ return 0;
+ }
+ return buffer->_capacity - buffer->size;
+}
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