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(obstack_empty_p): New definition.

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This commit is contained in:
Ulrich Drepper 1997-11-19 22:57:20 +00:00
parent a865a9eded
commit 0982ec0149
1 changed files with 11 additions and 3 deletions
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14
malloc/obstack.h
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@ -104,8 +104,8 @@ Summary:
/* Don't do the contents of this file more than once. */
#ifndef __OBSTACK_H__
#define __OBSTACK_H__
#ifndef _OBSTACK_H
#define _OBSTACK_H 1
#ifdef __cplusplus
extern "C" {
@ -379,6 +379,11 @@ __extension__ \
_obstack_newchunk (__o, __len); \
(void) 0; })
#define obstack_empty_p(OBSTACK) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
(__o->chunk->prev == 0 && __o->next_free - __o->chunk->contents == 0); })
#define obstack_grow(OBSTACK,where,length) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
@ -492,6 +497,9 @@ __extension__ \
#define obstack_room(h) \
(unsigned) ((h)->chunk_limit - (h)->next_free)
#define obstack_empty_p(h) \
((h)->chunk->prev == 0 && (h)->next_free - (h)->chunk->contents == 0)
/* Note that the call to _obstack_newchunk is enclosed in (..., 0)
so that we can avoid having void expressions
in the arms of the conditional expression.
@ -587,4 +595,4 @@ __extension__ \
} /* C++ */
#endif
#endif /* not __OBSTACK_H__ */
#endif /* obstack.h */