| /* Wrapper for the mlock2 system call with fallback to mlock. |
| Copyright (C) 2017-2018 Free Software Foundation, Inc. |
| |
| 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 <sys/mman.h> |
| #include <errno.h> |
| #include <sysdep.h> |
| |
| int |
| mlock2 (const void *addr, size_t length, unsigned int flags) |
| { |
| #ifdef __ASSUME_MLOCK2 |
| return INLINE_SYSCALL_CALL (mlock2, addr, length, flags); |
| #else |
| if (flags == 0) |
| return INLINE_SYSCALL_CALL (mlock, addr, length); |
| # ifdef __NR_mlock2 |
| int ret = INLINE_SYSCALL_CALL (mlock2, addr, length, flags); |
| if (ret == 0 || errno != ENOSYS) |
| return ret; |
| # endif /* __NR_mlock2 */ |
| /* Treat the missing system call as an invalid (non-zero) flag |
| argument. */ |
| __set_errno (EINVAL); |
| return -1; |
| #endif /* __ASSUME_MLOCK2 */ |
| } |
