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Add support for cancellation handling and handle both __NR_pread64 and

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__NR_pread.
This commit is contained in:
Ulrich Drepper 2003-01-27 19:00:40 +00:00
parent fab80146ed
commit 8c5a1c7889
2 changed files with 55 additions and 2 deletions
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28
sysdeps/unix/sysv/linux/mips/pread.c
View File

@ -22,12 +22,19 @@
#include <unistd.h>
#include <endian.h>
#include <sysdep.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <bp-checks.h>
#include <kernel-features.h>
#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
#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
# if __ASSUME_PREAD_SYSCALL == 0
@ -48,6 +55,22 @@ __libc_pread (fd, buf, count, offset)
{
ssize_t result;
if (SINGLE_THREAD_P)
{
/* First try the syscall. */
assert (sizeof (offset) == 4);
result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0,
__LONG_LONG_PAIR (offset >> 31, offset));
# if __ASSUME_PREAD_SYSCALL == 0
if (result == -1 && errno == ENOSYS)
/* No system call available. Use the emulation. */
result = __emulate_pread (fd, buf, count, offset);
# endif
return result;
}
int oldtype = LIBC_CANCEL_ASYNC ();
/* First try the syscall. */
assert (sizeof (offset) == 4);
result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0,
@ -57,6 +80,9 @@ __libc_pread (fd, buf, count, offset)
/* No system call available. Use the emulation. */
result = __emulate_pread (fd, buf, count, offset);
# endif
LIBC_CANCEL_RESET (oldtype);
return result;
}

29
sysdeps/unix/sysv/linux/mips/pread64.c
View File

@ -21,12 +21,19 @@
#include <unistd.h>
#include <endian.h>
#include <sysdep.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <bp-checks.h>
#include <kernel-features.h>
#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
#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
# if __ASSUME_PREAD_SYSCALL == 0
@ -48,6 +55,23 @@ __libc_pread64 (fd, buf, count, offset)
{
ssize_t result;
if (SINGLE_THREAD_P)
{
/* First try the syscall. */
result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
(off_t) (offset & 0xffffffff)));
# if __ASSUME_PREAD_SYSCALL == 0
if (result == -1 && errno == ENOSYS)
/* No system call available. Use the emulation. */
result = __emulate_pread64 (fd, buf, count, offset);
# endif
return result;
}
int oldtype = LIBC_CANCEL_ASYNC ();
/* First try the syscall. */
result = INLINE_SYSCALL (pread, 6, fd, CHECK_N (buf, count), count, 0,
__LONG_LONG_PAIR ((off_t) (offset >> 32),
@ -57,6 +81,9 @@ __libc_pread64 (fd, buf, count, offset)
/* No system call available. Use the emulation. */
result = __emulate_pread64 (fd, buf, count, offset);
# endif
LIBC_CANCEL_RESET (oldtype);
return result;
}