Mercurial > libjeffpc
view io_common.h @ 794:d018af7c979c
slab: make struct mem_cache private
Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
author | Josef 'Jeff' Sipek <jeffpc@josefsipek.net> |
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date | Sun, 15 Mar 2020 15:52:09 +0200 |
parents | a8fee5d5997f |
children | 616a36d39703 |
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/* * Copyright (c) 2011-2017 Josef 'Jeff' Sipek <jeffpc@josefsipek.net> * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef __JEFFPC_IO_COMMON_H #define __JEFFPC_IO_COMMON_H #include <stdbool.h> static inline ssize_t rw(int fd, void *buf, size_t nbyte, off_t off, const bool useoff, const bool readfxns, size_t *resid) { char *ptr = buf; size_t total; ssize_t ret; total = 0; while (nbyte) { if (readfxns) { if (useoff) ret = pread(fd, ptr, nbyte, off); else ret = read(fd, ptr, nbyte); } else { if (useoff) ret = pwrite(fd, ptr, nbyte, off); else ret = write(fd, ptr, nbyte); } if (ret < 0) { ret = -errno; goto err; } if (ret == 0) { ret = -EPIPE; goto err; } nbyte -= ret; total += ret; ptr += ret; off += ret; } ret = 0; /* success, all read/written */ err: if (resid) *resid = nbyte; return ret; } #endif