diff options
Diffstat (limited to 'nptl/pt-writev.c')
| -rw-r--r-- | nptl/pt-writev.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/nptl/pt-writev.c b/nptl/pt-writev.c index c1dda350aa..99e876c902 100644 --- a/nptl/pt-writev.c +++ b/nptl/pt-writev.c @@ -26,7 +26,8 @@ /* Not all versions of the kernel support the large number of records. */ #ifndef UIO_FASTIOV -# define UIO_FASTIOV 8 /* 8 is a safe number. */ +/* 1024 is what the kernels with NPTL support use. */ +# define UIO_FASTIOV 1024 #endif @@ -36,21 +37,29 @@ writev (fd, vector, count) const struct iovec *vector; int count; { - int oldtype; - ssize_t result; - - CANCEL_ASYNC (oldtype); + int oldtype = CANCEL_ASYNC (); + ssize_t result; #ifdef INTERNAL_SYSCALL result = INTERNAL_SYSCALL (writev, 3, fd, vector, count); - if (INTERNAL_SYSCALL_ERROR_P (result) - && __builtin_expect (count > UIO_FASTIOV, 0)) -#elif defined INLINE_SYSCALL + if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result), 0)) + { + if (count <= UIO_FASTIOV) + { + __set_errno (INTERNAL_SYSCALL_ERRNO (result)); + result = -1; + } + else + result = __libc_writev (fd, vector, count); + } +#else +# if defined INLINE_SYSCALL result = INLINE_SYSCALL (writev, 3, fd, vector, count); if (result < 0 && errno == EINVAL && __builtin_expect (count > UIO_FASTIOV, 0)) -#endif +# endif result = __libc_writev (fd, vector, count); +#endif CANCEL_RESET (oldtype); |