diff options
Diffstat (limited to 'sys/sys/sockbuf.h')
-rw-r--r-- | sys/sys/sockbuf.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/sys/sys/sockbuf.h b/sys/sys/sockbuf.h index 6994fd3..877b530 100644 --- a/sys/sys/sockbuf.h +++ b/sys/sys/sockbuf.h @@ -52,6 +52,7 @@ #define SB_NOCOALESCE 0x200 /* don't coalesce new data into existing mbufs */ #define SB_IN_TOE 0x400 /* socket buffer is in the middle of an operation */ #define SB_AUTOSIZE 0x800 /* automatically size socket buffer */ +#define SB_STOP 0x1000 /* backpressure indicator */ #define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ #define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ @@ -168,9 +169,19 @@ void sbunlock(struct sockbuf *sb); * still be negative (cc > hiwat or mbcnt > mbmax). Should detect * overflow and return 0. Should use "lmin" but it doesn't exist now. */ -#define sbspace(sb) \ - ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \ - (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) +static __inline +long +sbspace(struct sockbuf *sb) +{ + long bleft; + long mleft; + + if (sb->sb_flags & SB_STOP) + return(0); + bleft = sb->sb_hiwat - sb->sb_cc; + mleft = sb->sb_mbmax - sb->sb_mbcnt; + return((bleft < mleft) ? bleft : mleft); +} /* adjust counters in sb reflecting allocation of m */ #define sballoc(sb, m) { \ |