lib/ofpbuf.c
/* Initializes 'b' as an empty ofpbuf that contains the 'allocated' bytes of
 * memory starting at 'base'.  'base' should point to a buffer on the stack.
 * (Nothing actually relies on 'base' being allocated on the stack.  It could
 * be static or malloc()'d memory.  But stack space is the most common use
 * case.)
 *
 * 'base' should be appropriately aligned.  Using an array of uint32_t or
 * uint64_t for the buffer is a reasonable way to ensure appropriate alignment
 * for 32- or 64-bit data.
 *
 * An ofpbuf operation that requires reallocating data will copy the provided
 * buffer into a malloc()'d buffer.  Thus, it is wise to call ofpbuf_uninit()
 * on an ofpbuf initialized by this function, so that if it expanded into the
 * heap, that memory is freed. */


'base' should be appropriately aligned.  Using an array of uint32_t or
uint64_t for the buffer is a reasonable way to ensure appropriate alignment
for 32- or 64-bit data.

An ofpbuf operation that requires reallocating data will copy the provided
buffer into a malloc()'d buffer.  Thus, it is wise to call ofpbuf_uninit()
on an ofpbuf initialized by this function, so that if it expanded into the
heap, that memory is freed.
' base ' should be appropriately aligned . Using an array of uint32_t or uint64_t for the buffer is a reasonable way to ensure appropriate alignment for 32 - or 64 - bit data . An ofpbuf operation that requires reallocating data will copy the provided buffer into a malloc () ' d buffer . Thus it is wise to call ofpbuf_uninit () on an ofpbuf initialized by this function so that if it expanded into the heap that memory is freed .
void
ofpbuf_use_stub(struct ofpbuf *b, void *base, size_t allocated)
{
    ofpbuf_use__(b, base, allocated, 0, OFPBUF_STUB);
}
void ofpbuf_use_stub ( struct ofpbuf * b , void * base , size_t allocated ) { ofpbuf_use__ ( b , base , allocated , 0 , OFPBUF_STUB ) ; }
Initializes 'b' as an empty ofpbuf that contains the 'allocated' bytes of
 memory starting at 'base'.
Initializes ' b ' as an empty ofpbuf that contains the ' allocated ' bytes of memory starting at ' base ' .