comparison: src/server/util/io.c
src/server/util/io.c
- changeset 14
- b8bf95b39952
- parent 9
- 30e51941a673
- child 20
- 7b235fa88008
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| 13:1fdbf4170ef4 | 14:b8bf95b39952 |
|---|---|
| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2011 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <unistd.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <sys/uio.h> | |
| 32 | |
| 33 #include "io.h" | |
| 34 #include "pool.h" | |
| 35 | |
| 36 IOStream native_io_funcs = { | |
| 37 system_write, | |
| 38 system_read | |
| 39 }; | |
| 40 | |
| 41 IOStream net_io_funcs = { | |
| 42 net_stream_write, | |
| 43 net_stream_read | |
| 44 }; | |
| 45 | |
| 46 | |
| 47 IOStream* stream_new_from_fd(int fd) { | |
| 48 SystemIOStream *st = malloc(sizeof(SystemIOStream)); | |
| 49 st->st = native_io_funcs; | |
| 50 st->fd = fd; | |
| 51 return (IOStream*)st; | |
| 52 } | |
| 53 | |
| 54 ssize_t system_write(IOStream *st, void *buf, size_t nbytes) { | |
| 55 return write(((SystemIOStream*)st)->fd, buf, nbytes); | |
| 56 } | |
| 57 | |
| 58 ssize_t system_read(IOStream *st, void *buf, size_t nbytes) { | |
| 59 return read(((SystemIOStream*)st)->fd, buf, nbytes); | |
| 60 } | |
| 61 | |
| 62 | |
| 63 IOStream* net_stream_from_fd(int fd) { | |
| 64 NetIOStream *st = malloc(sizeof(NetIOStream)); | |
| 65 st->st = net_io_funcs; | |
| 66 st->fd = fd; | |
| 67 st->max_read = 0; | |
| 68 st->rd = 0; | |
| 69 } | |
| 70 | |
| 71 ssize_t net_stream_write(IOStream *st, void *buf, size_t nbytes) { | |
| 72 // TODO: implement | |
| 73 } | |
| 74 | |
| 75 ssize_t net_stream_read(IOStream *st, void *buf, size_t nbytes) { | |
| 76 NetIOStream *n = (NetIOStream*)st; | |
| 77 if(n->max_read != 0 && n->rd >= n->max_read) { | |
| 78 return 0; | |
| 79 } | |
| 80 ssize_t r = read(n->fd, buf, nbytes); | |
| 81 n->rd += r; | |
| 82 return r; | |
| 83 } | |
| 84 | |
| 85 | |
| 86 ssize_t net_read(SYS_NETFD fd, void *buf, size_t nbytes) { | |
| 87 ssize_t r = ((IOStream*)fd)->read(fd, buf, nbytes); | |
| 88 if(r == 0) { | |
| 89 return IO_EOF; | |
| 90 } | |
| 91 return r; | |
| 92 } | |
| 93 | |
| 94 ssize_t net_write(SYS_NETFD fd, void *buf, size_t nbytes) { | |
| 95 ssize_t r = ((IOStream*)fd)->write(fd, buf, nbytes); | |
| 96 if(r < 0) { | |
| 97 return IO_ERROR; | |
| 98 } | |
| 99 return r; | |
| 100 } | |
| 101 | |
| 102 | |
| 103 /* iovec buffer */ | |
| 104 iovec_buf_t *iovec_buf_create(pool_handle_t *pool) { | |
| 105 iovec_buf_t *buf = pool_malloc(pool, sizeof(iovec_buf_t)); | |
| 106 | |
| 107 buf->pool = pool; | |
| 108 buf->iov = pool_calloc(pool, 32, sizeof(struct iovec)); | |
| 109 buf->maxiovec = 32; | |
| 110 buf->iovctn = 0; | |
| 111 | |
| 112 return buf; | |
| 113 } | |
| 114 | |
| 115 void iovec_buf_write(iovec_buf_t *io, void *buf, size_t nbyte) { | |
| 116 if(io->iovctn >= io->maxiovec) { | |
| 117 io->iov = pool_realloc( | |
| 118 io->pool, | |
| 119 io->iov, | |
| 120 (io->maxiovec + 16) * sizeof(struct iovec)); | |
| 121 } | |
| 122 | |
| 123 io->iov[io->iovctn].iov_base = buf; | |
| 124 io->iov[io->iovctn].iov_len = nbyte; | |
| 125 io->iovctn++; | |
| 126 } | |
| 127 | |
| 128 ssize_t iovec_buf_flush(iovec_buf_t *io, int fd) { | |
| 129 return writev(fd, io->iov, io->iovctn); | |
| 130 } |
