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sys-uio.c
126 lines (101 loc) · 1.93 KB
/
sys-uio.c
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/*
* <sys/uio.h> wrapper functions.
*
* Authors:
* Steffen Kiess (s-kiess@web.de)
*
* Copyright (C) 2012 Steffen Kiess
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif /* ndef _GNU_SOURCE */
#include <sys/uio.h>
#include "map.h"
#include "mph.h"
G_BEGIN_DECLS
static struct iovec*
from_iovec (struct Mono_Posix_Iovec *iov, gint32 iovcnt)
{
struct iovec* v;
gint32 i;
if (iovcnt < 0) {
errno = EINVAL;
return NULL;
}
v = malloc (iovcnt * sizeof (struct iovec));
if (!v) {
return NULL;
}
for (i = 0; i < iovcnt; i++) {
if (Mono_Posix_FromIovec (&iov[i], &v[i]) != 0) {
free (v);
return NULL;
}
}
return v;
}
#ifdef HAVE_READV
gint64
Mono_Posix_Syscall_readv (int dirfd, struct Mono_Posix_Iovec *iov, gint32 iovcnt)
{
struct iovec* v;
gint64 res;
v = from_iovec (iov, iovcnt);
if (!v) {
return -1;
}
res = readv(dirfd, v, iovcnt);
free (v);
return res;
}
#endif /* def HAVE_READV */
#ifdef HAVE_WRITEV
gint64
Mono_Posix_Syscall_writev (int dirfd, struct Mono_Posix_Iovec *iov, gint32 iovcnt)
{
struct iovec* v;
gint64 res;
v = from_iovec (iov, iovcnt);
if (!v) {
return -1;
}
res = writev (dirfd, v, iovcnt);
free (v);
return res;
}
#endif /* def HAVE_WRITEV */
#ifdef HAVE_PREADV
gint64
Mono_Posix_Syscall_preadv (int dirfd, struct Mono_Posix_Iovec *iov, gint32 iovcnt, gint64 off)
{
struct iovec* v;
gint64 res;
mph_return_if_off_t_overflow (off);
v = from_iovec (iov, iovcnt);
if (!v) {
return -1;
}
res = preadv (dirfd, v, iovcnt, (off_t) off);
free (v);
return res;
}
#endif /* def HAVE_PREADV */
#ifdef HAVE_PWRITEV
gint64
Mono_Posix_Syscall_pwritev (int dirfd, struct Mono_Posix_Iovec *iov, gint32 iovcnt, gint64 off)
{
struct iovec* v;
gint64 res;
mph_return_if_off_t_overflow (off);
v = from_iovec (iov, iovcnt);
if (!v) {
return -1;
}
res = pwritev (dirfd, v, iovcnt, (off_t) off);
free (v);
return res;
}
#endif /* def HAVE_PWRITEV */
/*
* vim: noexpandtab
*/