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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/*
* Based in part on the files
* ./sysdeps/unix/sysv/linux/pwrite.c,
* ./sysdeps/unix/sysv/linux/pread.c,
* sysdeps/posix/pread.c
* sysdeps/posix/pwrite.c
* from GNU libc 2.2.5, but reworked considerably...
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <stdint.h>
#include <endian.h>
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
#include <sysdep-cancel.h>
#else
#define SINGLE_THREAD_P 1
#endif
#ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pread
# error "__NR_pread and __NR_pread64 both defined???"
# endif
# define __NR_pread __NR_pread64
#endif
#ifdef __NR_pread
extern __typeof(pread) __libc_pread;
# define __NR___syscall_pread __NR_pread
static __inline__ _syscall6(ssize_t, __syscall_pread, int, fd, void *, buf,
size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset)
{
if (SINGLE_THREAD_P)
return(__syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset)));
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = __syscall_pread(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
LIBC_CANCEL_RESET (oldtype);
return result;
#endif
}
weak_alias(__libc_pread,pread)
# ifdef __UCLIBC_HAS_LFS__
extern __typeof(pread64) __libc_pread64;
ssize_t __libc_pread64(int fd, void *buf, size_t count, off64_t offset)
{
uint32_t low = offset & 0xffffffff;
uint32_t high = offset >> 32;
if (SINGLE_THREAD_P)
return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
LIBC_CANCEL_RESET (oldtype);
return result;
#endif
}
weak_alias(__libc_pread64,pread64)
# endif /* __UCLIBC_HAS_LFS__ */
#endif /* __NR_pread */
/**********************************************************************/
#ifdef __NR_pwrite64 /* Newer kernels renamed but it's the same. */
# ifdef __NR_pwrite
# error "__NR_pwrite and __NR_pwrite64 both defined???"
# endif
# define __NR_pwrite __NR_pwrite64
#endif
#ifdef __NR_pwrite
extern __typeof(pwrite) __libc_pwrite;
# define __NR___syscall_pwrite __NR_pwrite
static __inline__ _syscall6(ssize_t, __syscall_pwrite, int, fd, const void *, buf,
size_t, count, int, dummy, off_t, offset_hi, off_t, offset_lo)
ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
if (SINGLE_THREAD_P)
return __syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = __syscall_pwrite(fd,buf,count,0,__LONG_LONG_PAIR(offset >> 31,offset));
LIBC_CANCEL_RESET (oldtype);
return result;
#endif
}
weak_alias(__libc_pwrite,pwrite)
# ifdef __UCLIBC_HAS_LFS__
extern __typeof(pwrite64) __libc_pwrite64;
ssize_t __libc_pwrite64(int fd, const void *buf, size_t count, off64_t offset)
{
uint32_t low = offset & 0xffffffff;
uint32_t high = offset >> 32;
if (SINGLE_THREAD_P)
return __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = __syscall_pwrite(fd, buf, count, 0, __LONG_LONG_PAIR (high, low));
LIBC_CANCEL_RESET (oldtype);
return result;
#endif
}
weak_alias(__libc_pwrite64,pwrite64)
# endif /* __UCLIBC_HAS_LFS__ */
#endif /* __NR_pwrite */
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