diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 1994-11-28 11:59:19 +0000 |
|---|---|---|
| committer | <ralf@linux-mips.org> | 1994-11-28 11:59:19 +0000 |
| commit | 1513ff9b7899ab588401c89db0e99903dbf5f886 (patch) | |
| tree | f69cc81a940a502ea23d664c3ffb2d215a479667 /include/linux/pipe_fs_i.h | |
Import of Linus's Linux 1.1.68
Diffstat (limited to 'include/linux/pipe_fs_i.h')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h new file mode 100644 index 000000000..21b39d628 --- /dev/null +++ b/include/linux/pipe_fs_i.h @@ -0,0 +1,35 @@ +#ifndef _LINUX_PIPE_FS_I_H +#define _LINUX_PIPE_FS_I_H + +struct pipe_inode_info { + struct wait_queue * wait; + char * base; + unsigned int start; + unsigned int len; + unsigned int lock; + unsigned int rd_openers; + unsigned int wr_openers; + unsigned int readers; + unsigned int writers; +}; + +#define PIPE_WAIT(inode) ((inode).u.pipe_i.wait) +#define PIPE_BASE(inode) ((inode).u.pipe_i.base) +#define PIPE_START(inode) ((inode).u.pipe_i.start) +#define PIPE_LEN(inode) ((inode).u.pipe_i.len) +#define PIPE_RD_OPENERS(inode) ((inode).u.pipe_i.rd_openers) +#define PIPE_WR_OPENERS(inode) ((inode).u.pipe_i.wr_openers) +#define PIPE_READERS(inode) ((inode).u.pipe_i.readers) +#define PIPE_WRITERS(inode) ((inode).u.pipe_i.writers) +#define PIPE_LOCK(inode) ((inode).u.pipe_i.lock) +#define PIPE_SIZE(inode) PIPE_LEN(inode) + +#define PIPE_EMPTY(inode) (PIPE_SIZE(inode)==0) +#define PIPE_FULL(inode) (PIPE_SIZE(inode)==PIPE_BUF) +#define PIPE_FREE(inode) (PIPE_BUF - PIPE_LEN(inode)) +#define PIPE_END(inode) ((PIPE_START(inode)+PIPE_LEN(inode))&\ + (PIPE_BUF-1)) +#define PIPE_MAX_RCHUNK(inode) (PIPE_BUF - PIPE_START(inode)) +#define PIPE_MAX_WCHUNK(inode) (PIPE_BUF - PIPE_END(inode)) + +#endif |