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Annotation of embedaddon/tmux/compat/imsg.h, revision 1.1

1.1     ! misho       1: /*     $OpenBSD: imsg.h,v 1.4 2017/03/24 09:34:12 nicm Exp $   */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@openbsd.org>
        !             5:  * Copyright (c) 2006, 2007, 2008 Reyk Floeter <reyk@openbsd.org>
        !             6:  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
        !             7:  *
        !             8:  * Permission to use, copy, modify, and distribute this software for any
        !             9:  * purpose with or without fee is hereby granted, provided that the above
        !            10:  * copyright notice and this permission notice appear in all copies.
        !            11:  *
        !            12:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            13:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            14:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            15:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            16:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            17:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            18:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            19:  */
        !            20: 
        !            21: #ifndef _IMSG_H_
        !            22: #define _IMSG_H_
        !            23: 
        !            24: #define IBUF_READ_SIZE         65535
        !            25: #define IMSG_HEADER_SIZE       sizeof(struct imsg_hdr)
        !            26: #define MAX_IMSGSIZE           16384
        !            27: 
        !            28: struct ibuf {
        !            29:        TAILQ_ENTRY(ibuf)        entry;
        !            30:        u_char                  *buf;
        !            31:        size_t                   size;
        !            32:        size_t                   max;
        !            33:        size_t                   wpos;
        !            34:        size_t                   rpos;
        !            35:        int                      fd;
        !            36: };
        !            37: 
        !            38: struct msgbuf {
        !            39:        TAILQ_HEAD(, ibuf)       bufs;
        !            40:        uint32_t                 queued;
        !            41:        int                      fd;
        !            42: };
        !            43: 
        !            44: struct ibuf_read {
        !            45:        u_char                   buf[IBUF_READ_SIZE];
        !            46:        u_char                  *rptr;
        !            47:        size_t                   wpos;
        !            48: };
        !            49: 
        !            50: struct imsg_fd {
        !            51:        TAILQ_ENTRY(imsg_fd)    entry;
        !            52:        int                     fd;
        !            53: };
        !            54: 
        !            55: struct imsgbuf {
        !            56:        TAILQ_HEAD(, imsg_fd)    fds;
        !            57:        struct ibuf_read         r;
        !            58:        struct msgbuf            w;
        !            59:        int                      fd;
        !            60:        pid_t                    pid;
        !            61: };
        !            62: 
        !            63: #define IMSGF_HASFD    1
        !            64: 
        !            65: struct imsg_hdr {
        !            66:        uint32_t         type;
        !            67:        uint16_t         len;
        !            68:        uint16_t         flags;
        !            69:        uint32_t         peerid;
        !            70:        uint32_t         pid;
        !            71: };
        !            72: 
        !            73: struct imsg {
        !            74:        struct imsg_hdr  hdr;
        !            75:        int              fd;
        !            76:        void            *data;
        !            77: };
        !            78: 
        !            79: 
        !            80: /* buffer.c */
        !            81: struct ibuf    *ibuf_open(size_t);
        !            82: struct ibuf    *ibuf_dynamic(size_t, size_t);
        !            83: int             ibuf_add(struct ibuf *, const void *, size_t);
        !            84: void           *ibuf_reserve(struct ibuf *, size_t);
        !            85: void           *ibuf_seek(struct ibuf *, size_t, size_t);
        !            86: size_t          ibuf_size(struct ibuf *);
        !            87: size_t          ibuf_left(struct ibuf *);
        !            88: void            ibuf_close(struct msgbuf *, struct ibuf *);
        !            89: int             ibuf_write(struct msgbuf *);
        !            90: void            ibuf_free(struct ibuf *);
        !            91: void            msgbuf_init(struct msgbuf *);
        !            92: void            msgbuf_clear(struct msgbuf *);
        !            93: int             msgbuf_write(struct msgbuf *);
        !            94: void            msgbuf_drain(struct msgbuf *, size_t);
        !            95: 
        !            96: /* imsg.c */
        !            97: void    imsg_init(struct imsgbuf *, int);
        !            98: ssize_t         imsg_read(struct imsgbuf *);
        !            99: ssize_t         imsg_get(struct imsgbuf *, struct imsg *);
        !           100: int     imsg_compose(struct imsgbuf *, uint32_t, uint32_t, pid_t, int,
        !           101:            const void *, uint16_t);
        !           102: int     imsg_composev(struct imsgbuf *, uint32_t, uint32_t,  pid_t, int,
        !           103:            const struct iovec *, int);
        !           104: struct ibuf *imsg_create(struct imsgbuf *, uint32_t, uint32_t, pid_t, uint16_t);
        !           105: int     imsg_add(struct ibuf *, const void *, uint16_t);
        !           106: void    imsg_close(struct imsgbuf *, struct ibuf *);
        !           107: void    imsg_free(struct imsg *);
        !           108: int     imsg_flush(struct imsgbuf *);
        !           109: void    imsg_clear(struct imsgbuf *);
        !           110: 
        !           111: #endif