diff options
| author | Salvatore Cro <salvatore.cro@st.com> | 2010-09-09 16:01:04 +0200 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2010-09-15 12:38:42 +0200 |
| commit | 4b88e6e858b55def2ef0392278ddf81835f2ac45 (patch) | |
| tree | e97e06b8eb18ef18f86e598ccec879405bdcee53 /libc/sysdeps/linux/common/fdatasync.c | |
| parent | 37eb913ed8c4798b736e678f4dbd9f4a91a68f74 (diff) | |
libc: Fix cancellation handling in some C functions
According to POSIX.1-2008 standard, the following syscalls shall be
cancellation points : waitid, sleep, fdatasync, ppoll.
Further, if generic syscall is not available and stubs are
configured, provide the stub implementation for function.
Signed-off-by: Salvatore Cro <salvatore.cro@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'libc/sysdeps/linux/common/fdatasync.c')
| -rw-r--r-- | libc/sysdeps/linux/common/fdatasync.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/common/fdatasync.c b/libc/sysdeps/linux/common/fdatasync.c index a40f3e00c..19d37b6e0 100644 --- a/libc/sysdeps/linux/common/fdatasync.c +++ b/libc/sysdeps/linux/common/fdatasync.c @@ -14,4 +14,37 @@ # define __NR_fdatasync __NR_osf_fdatasync #endif -_syscall1(int, fdatasync, int, fd) +#ifdef __NR_fdatasync + +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include <sysdep-cancel.h> +# else +# define SINGLE_THREAD_P 1 +# endif + +#define __NR___syscall_fdatasync __NR_fdatasync + +static __always_inline +_syscall1(int, __syscall_fdatasync, int, fd) + +int fdatasync(int fd) +{ + if (SINGLE_THREAD_P) + return __syscall_fdatasync(fd); + +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ + int oldtype = LIBC_CANCEL_ASYNC (); + int result = __syscall_fdatasync(fd); + LIBC_CANCEL_RESET (oldtype); + return result; +# endif +} + +#elif defined __UCLIBC_HAS_STUBS__ +/* no syscall available, so provide a stub */ +int fdatasync(int fd) +{ + __set_errno(ENOSYS); + return -1; +} +#endif |