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-rw-r--r--src/basic/io-util.h76
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diff --git a/src/basic/io-util.h b/src/basic/io-util.h
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#include "time-util.h"
+
+int flush_fd(int fd);
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
+int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
+int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
+
+int pipe_eof(int fd);
+
+int fd_wait_for_event(int fd, int event, usec_t timeout);
+
+ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
+
+#define IOVEC_SET_STRING(i, s) \
+ do { \
+ struct iovec *_i = &(i); \
+ char *_s = (char *)(s); \
+ _i->iov_base = _s; \
+ _i->iov_len = strlen(_s); \
+ } while(false)
+
+static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
+ unsigned j;
+ size_t r = 0;
+
+ for (j = 0; j < n; j++)
+ r += i[j].iov_len;
+
+ return r;
+}
+
+static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
+ unsigned j;
+
+ for (j = 0; j < n; j++) {
+ size_t sub;
+
+ if (_unlikely_(k <= 0))
+ break;
+
+ sub = MIN(i[j].iov_len, k);
+ i[j].iov_len -= sub;
+ i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
+ k -= sub;
+ }
+
+ return k;
+}