71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/* Copyright (C) 1997, 1998, 1999, 2000, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <errno.h>
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#include <endian.h>
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#include <unistd.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <bp-checks.h>
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#include <nptl/pthreadP.h>
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#include <tls.h>
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#ifndef __NR_pread64 /* Newer kernels renamed but it's the same. */
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# error "__NR_pread64 must be defined"
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#endif
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/* The order of hi, lo depends on endianness. */
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extern ssize_t __syscall_pread64 (int fd, void *__unbounded buf, size_t count,
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off_t offset_hi, off_t offset_lo);
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ssize_t
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__libc_pread (fd, buf, count, offset)
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int fd;
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void *buf;
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size_t count;
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off_t offset;
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{
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assert (sizeof (offset) == 4);
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#ifndef NOT_IN_libc
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if (__builtin_expect (THREAD_GETMEM (THREAD_SELF,
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header.data.multiple_threads) == 0, 1))
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return INLINE_SYSCALL (pread64, 5, fd, CHECK_N (buf, count), count,
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__LONG_LONG_PAIR (offset >> 31, offset));
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int oldtype = LIBC_CANCEL_ASYNC ();
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#endif
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ssize_t result = INLINE_SYSCALL (pread64, 5, fd, CHECK_N (buf, count), count,
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__LONG_LONG_PAIR (offset >> 31, offset));
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#ifndef NOT_IN_libc
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LIBC_CANCEL_RESET (oldtype);
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#endif
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return result;
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}
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strong_alias (__libc_pread, __pread)
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weak_alias (__libc_pread, pread)
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