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41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* Wrapper for the mlock2 system call with fallback to mlock.
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Copyright (C) 2017-2019 Free Software Foundation, Inc.
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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, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/mman.h>
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#include <errno.h>
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#include <sysdep.h>
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int
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mlock2 (const void *addr, size_t length, unsigned int flags)
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{
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#ifdef __ASSUME_MLOCK2
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return INLINE_SYSCALL_CALL (mlock2, addr, length, flags);
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#else
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if (flags == 0)
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return INLINE_SYSCALL_CALL (mlock, addr, length);
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# ifdef __NR_mlock2
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int ret = INLINE_SYSCALL_CALL (mlock2, addr, length, flags);
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if (ret == 0 || errno != ENOSYS)
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return ret;
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# endif /* __NR_mlock2 */
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/* Treat the missing system call as an invalid (non-zero) flag
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argument. */
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__set_errno (EINVAL);
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return -1;
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#endif /* __ASSUME_MLOCK2 */
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}
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