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Various style fixes.

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Also place the macros under #ifdef _KERNEL. Equally hide the internal
structures such as the freelist structs which include condition variables.

Reviewed by: bde
Mostly suggested by: bde
This commit is contained in:
Bosko Milekic 2001-04-05 03:55:27 +00:00
parent 2881e5831b
commit 22a847c32e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=75216
1 changed files with 28 additions and 21 deletions
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49
sys/sys/mbuf.h
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@ -37,9 +37,11 @@
#ifndef _SYS_MBUF_H_
#define _SYS_MBUF_H_
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#ifdef _KERNEL
#include <sys/condvar.h> /* XXX */
#include <sys/lock.h> /* XXX */
#include <sys/mutex.h> /* XXX */
#endif /* _KERNEL */
/*
* Mbufs are of a single size, MSIZE (machine/param.h), which
@ -71,13 +73,15 @@
*/
#define EXT_COUNTERS (nmbclusters + nsfbufs)
#ifdef _KERNEL
/*
* Macros for type conversion
* mtod(m, t) - convert mbuf pointer to data pointer of correct type
* dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX)
* mtod(m, t) - convert mbuf pointer to data pointer of correct type
* dtom(x) - convert data pointer within mbuf to mbuf pointer (XXX)
*/
#define mtod(m, t) ((t)((m)->m_data))
#define dtom(x) ((struct mbuf *)((intptr_t)(x) & ~(MSIZE-1)))
#endif /* _KERNEL */
/* header at beginning of each mbuf: */
struct m_hdr {
@ -202,7 +206,6 @@ struct mbuf {
#endif
#define MT_CONTROL 14 /* extra-data protocol message */
#define MT_OOBDATA 15 /* expedited data */
#define MT_NTYPES 16 /* number of mbuf types for mbtypes[] */
/*
@ -250,21 +253,26 @@ union mext_refcnt {
u_int refcnt;
};
#ifdef _KERNEL
/*
* free list header definitions: mbffree_lst, mclfree_lst, mcntfree_lst
* The freelists for mbufs and mbuf clusters include condition variables
* that are used in cases of depletion/starvation.
* The counter freelist does not require a condition variable as we never
* expect to consume more than the reserved address space for counters.
* All are presently protected by the mbuf_mtx lock.
*/
struct mbffree_lst {
struct mbuf *m_head;
struct cv m_starved;
struct mbuf *m_head;
struct cv m_starved;
};
struct mclfree_lst {
union mcluster *m_head;
struct cv m_starved;
union mcluster *m_head;
struct cv m_starved;
};
struct mcntfree_lst {
union mext_refcnt *m_head;
union mext_refcnt *m_head;
};
/*
@ -643,21 +651,20 @@ struct mauxtag {
int type;
};
#ifdef _KERNEL
extern u_long m_clalloc_wid; /* mbuf cluster wait count */
extern u_long m_mballoc_wid; /* mbuf wait count */
extern int max_datalen; /* MHLEN - max_hdr */
extern int max_hdr; /* largest link+protocol header */
extern int max_linkhdr; /* largest link-level header */
extern int max_protohdr; /* largest protocol header */
extern int max_hdr; /* largest link+protocol header */
extern int max_datalen; /* MHLEN - max_hdr */
extern struct mbstat mbstat;
extern u_long mbtypes[MT_NTYPES]; /* per-type mbuf allocations */
extern int mbuf_wait; /* mbuf sleep time */
extern struct mtx mbuf_mtx;
extern struct mbuf *mbutl; /* virtual address of mclusters */
extern struct mclfree_lst mclfree;
extern struct mbffree_lst mmbfree;
extern struct mcntfree_lst mcntfree;
extern struct mtx mbuf_mtx;
extern struct mbffree_lst mmbfree;
extern int nmbclusters;
extern int nmbufs;
extern int nsfbufs;
@ -667,11 +674,11 @@ int m_alloc_ref(u_int, int);
struct mbuf *m_aux_add(struct mbuf *, int, int);
void m_aux_delete(struct mbuf *, struct mbuf *);
struct mbuf *m_aux_find(struct mbuf *, int, int);
void m_cat(struct mbuf *,struct mbuf *);
void m_cat(struct mbuf *, struct mbuf *);
int m_clalloc(int, int);
caddr_t m_clalloc_wait(void);
void m_copyback(struct mbuf *, int, int, caddr_t);
void m_copydata(struct mbuf *,int,int,caddr_t);
void m_copydata(struct mbuf *, int, int, caddr_t);
struct mbuf *m_copym(struct mbuf *, int, int, int);
struct mbuf *m_copypacket(struct mbuf *, int);
struct mbuf *m_devget(char *, int, int, struct ifnet *,
@ -685,11 +692,11 @@ struct mbuf *m_gethdr(int, int);
struct mbuf *m_getm(struct mbuf *, int, int, int);
int m_mballoc(int, int);
struct mbuf *m_mballoc_wait(void);
struct mbuf *m_prepend(struct mbuf *,int,int);
struct mbuf *m_prepend(struct mbuf *, int, int);
void m_print(const struct mbuf *m);
struct mbuf *m_pulldown(struct mbuf *, int, int, int *);
struct mbuf *m_pullup(struct mbuf *, int);
struct mbuf *m_split(struct mbuf *,int,int);
struct mbuf *m_split(struct mbuf *, int, int);
#endif /* _KERNEL */
#endif /* !_SYS_MBUF_H_ */