xmalloc.h

来自「xen 3.2.2 源码」· C头文件 代码 · 共 28 行

#ifndef __XMALLOC_H__
#define __XMALLOC_H__

/* Allocate space for typed object. */
#define xmalloc(_type) ((_type *)_xmalloc(sizeof(_type), __alignof__(_type)))

/* Allocate space for array of typed objects. */
#define xmalloc_array(_type, _num) ((_type *)_xmalloc_array(sizeof(_type), __alignof__(_type), _num))

/* Allocate untyped storage. */
#define xmalloc_bytes(_bytes) (_xmalloc(_bytes, SMP_CACHE_BYTES))

/* Free any of the above. */
extern void xfree(void *);

/* Underlying functions */
extern void *_xmalloc(size_t size, size_t align);
static inline void *_xmalloc_array(size_t size, size_t align, size_t num)
{
	/* Check for overflow. */
	if (size && num > UINT_MAX / size)
		return NULL;
 	return _xmalloc(size * num, align);
}

#endif /* __XMALLOC_H__ */