diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c')
-rw-r--r-- | ports/sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c b/ports/sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c new file mode 100644 index 0000000000..5145755e80 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c @@ -0,0 +1,58 @@ +/* Copyright (C) 2011 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library 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. + + The GNU C Library 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 the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <errno.h> +#include <endian.h> +#include <unistd.h> + +#include <sysdep-cancel.h> +#include <sys/syscall.h> + +#include <kernel-features.h> + +static ssize_t +do_pread (int fd, void *buf, size_t count, off_t offset) +{ + assert (sizeof (offset) == 4); + return INLINE_SYSCALL (pread64, __ALIGNMENT_COUNT (5, 6), fd, + buf, count, __ALIGNMENT_ARG + __LONG_LONG_PAIR (offset >> 31, offset)); +} + +ssize_t +__libc_pread (fd, buf, count, offset) + int fd; + void *buf; + size_t count; + off_t offset; +{ + if (SINGLE_THREAD_P) + return do_pread (fd, buf, count, offset); + + int oldtype = LIBC_CANCEL_ASYNC (); + + ssize_t result = do_pread (fd, buf, count, offset); + + LIBC_CANCEL_RESET (oldtype); + + return result; +} +strong_alias (__libc_pread, __pread) +weak_alias (__libc_pread, pread) |