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check for null ptr in xm_buffer_unreference()

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This commit is contained in:
Brian 2007-08-23 21:39:51 +01:00
parent 440e794b05
commit ac8249d0ed
1 changed files with 11 additions and 9 deletions
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20
src/mesa/drivers/x11/xm_softpipe.c
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@ -112,17 +112,19 @@ xm_buffer_reference(struct pipe_winsys *pws, struct pipe_buffer_handle *buf)
static void
xm_buffer_unreference(struct pipe_winsys *pws, struct pipe_buffer_handle **buf)
{
struct xm_buffer *xm_buf = xm_bo(*buf);
xm_buf->refcount--;
assert(xm_buf->refcount >= 0);
if (xm_buf->refcount == 0) {
if (xm_buf->data) {
free(xm_buf->data);
xm_buf->data = NULL;
if (*buf) {
struct xm_buffer *xm_buf = xm_bo(*buf);
xm_buf->refcount--;
assert(xm_buf->refcount >= 0);
if (xm_buf->refcount == 0) {
if (xm_buf->data) {
free(xm_buf->data);
xm_buf->data = NULL;
}
free(xm_buf);
}
free(xm_buf);
*buf = NULL;
}
*buf = NULL;
}
static void