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util: introduce bitmap_try_new

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regular bitmap_new simply aborts if the memory allocation fails.
bitmap_try_new returns NULL on failure and allows for proper
error handling.

Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Lieven 2014-09-30 09:09:11 +02:00 committed by Paolo Bonzini
parent 49e7e31aa0
commit be4d57c1ea
1 changed files with 11 additions and 2 deletions
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13
include/qemu/bitmap.h
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@ -88,10 +88,19 @@ int slow_bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
int slow_bitmap_intersects(const unsigned long *bitmap1, int slow_bitmap_intersects(const unsigned long *bitmap1,
const unsigned long *bitmap2, long bits); const unsigned long *bitmap2, long bits);
static inline unsigned long *bitmap_new(long nbits) static inline unsigned long *bitmap_try_new(long nbits)
{ {
long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
return g_malloc0(len); return g_try_malloc0(len);
}
static inline unsigned long *bitmap_new(long nbits)
{
unsigned long *ptr = bitmap_try_new(nbits);
if (ptr == NULL) {
abort();
}
return ptr;
} }
static inline void bitmap_zero(unsigned long *dst, long nbits) static inline void bitmap_zero(unsigned long *dst, long nbits)