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introduce QEMU_AUTO_VFREE

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Introduce a convenient macro, that works for qemu_memalign() like
g_autofree works with g_malloc.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210628121133.193984-2-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-06-28 15:11:32 +03:00 committed by Kevin Wolf
parent 4c5393f169
commit 4d324c0bf6
1 changed files with 15 additions and 0 deletions
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15
include/qemu/osdep.h
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@ -386,6 +386,21 @@ void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
void qemu_vfree(void *ptr);
void qemu_anon_ram_free(void *ptr, size_t size);
/*
* It's an analog of GLIB's g_autoptr_cleanup_generic_gfree(), used to define
* g_autofree macro.
*/
static inline void qemu_cleanup_generic_vfree(void *p)
{
void **pp = (void **)p;
qemu_vfree(*pp);
}
/*
* Analog of g_autofree, but qemu_vfree is called on cleanup instead of g_free.
*/
#define QEMU_AUTO_VFREE __attribute__((cleanup(qemu_cleanup_generic_vfree)))
/*
* Abstraction of PROT_ and MAP_ flags as passed to mmap(), for example,
* consumed by qemu_ram_mmap().