| Message ID | 20201027050556.269064-2-eblake@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Exposing backing-chain allocation over NBD | expand |
27.10.2020 08:05, Eric Blake wrote: > There is no need to rely on the verbosity of the gcc/clang compiler > extension of g_new(typeof(X), 1) when we can instead use the standard > g_malloc(sizeof(X)). In general, we like g_new over g_malloc for > returning type X rather than void* to let the compiler catch more > potential typing mistakes, but in this particular macro, our other use > of typeof on the same line already ensures we are getting correct > results. > > Suggested-by: Markus Armbruster<armbru@redhat.com> > Signed-off-by: Eric Blake<eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Eric Blake <eblake@redhat.com> writes: > There is no need to rely on the verbosity of the gcc/clang compiler > extension of g_new(typeof(X), 1) when we can instead use the standard > g_malloc(sizeof(X)). In general, we like g_new over g_malloc for > returning type X rather than void* to let the compiler catch more > potential typing mistakes, but in this particular macro, our other use > of typeof on the same line already ensures we are getting correct > results. > > Suggested-by: Markus Armbruster <armbru@redhat.com> > Signed-off-by: Eric Blake <eblake@redhat.com> > --- > block.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/block.c b/block.c > index 430edf79bb10..857387f3912f 100644 > --- a/block.c > +++ b/block.c > @@ -5231,7 +5231,7 @@ BlockDeviceInfoList *bdrv_named_nodes_list(bool flat, > } > > #define QAPI_LIST_ADD(list, element) do { \ > - typeof(list) _tmp = g_new(typeof(*(list)), 1); \ > + typeof(list) _tmp = g_malloc(sizeof(*(list))); \ > _tmp->value = (element); \ > _tmp->next = (list); \ > (list) = _tmp; \ Reviewed-by: Markus Armbruster <armbru@redhat.com>
diff --git a/block.c b/block.c index 430edf79bb10..857387f3912f 100644 --- a/block.c +++ b/block.c @@ -5231,7 +5231,7 @@ BlockDeviceInfoList *bdrv_named_nodes_list(bool flat, } #define QAPI_LIST_ADD(list, element) do { \ - typeof(list) _tmp = g_new(typeof(*(list)), 1); \ + typeof(list) _tmp = g_malloc(sizeof(*(list))); \ _tmp->value = (element); \ _tmp->next = (list); \ (list) = _tmp; \
There is no need to rely on the verbosity of the gcc/clang compiler extension of g_new(typeof(X), 1) when we can instead use the standard g_malloc(sizeof(X)). In general, we like g_new over g_malloc for returning type X rather than void* to let the compiler catch more potential typing mistakes, but in this particular macro, our other use of typeof on the same line already ensures we are getting correct results. Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> --- block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)