53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* fcntl.h
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _FCNTL_H
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#define _FCNTL_H
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#include <sys/fcntl.h>
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#define O_NDELAY _FNDELAY
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/* F_LCK_MANDATORY: Request mandatory locks for this file descriptor.
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Cygwin extension to fcntl file locking mechanism. By default, fcntl file
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locks are advisory locks. This works nicely as long as only Cygwin
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processes interact. If you have the requirement to interact with native
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Windows applications which use Windows mandatory file locking, your have
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to use mandatory locking as well. The command
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fcntl (fd, F_LCK_MANDATORY, 1)
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switches subsequent F_GETLK, F_SETLK, F_SETLKW calls to mandatory locking
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for this file descriptor and subsequently duplicated ones WITHIN THE SAME
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PROCESS. Note that mandatory locks are NOT inherited by child processes,
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nor do they survive an execve call. This fully corresponds to Windows
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mandatory locking semantics. */
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#define F_LCK_MANDATORY 0x99
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/* POSIX-1.2008 requires this flag and allows to set it to 0 if its
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functionality is not required. */
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#define O_TTY_INIT 0
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#define POSIX_FADV_NORMAL 0
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#define POSIX_FADV_SEQUENTIAL 1
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#define POSIX_FADV_RANDOM 2
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#define POSIX_FADV_WILLNEED 3
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#define POSIX_FADV_DONTNEED 4
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#define POSIX_FADV_NOREUSE 5
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern int posix_fadvise _PARAMS ((int, off_t, off_t, int));
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extern int posix_fallocate _PARAMS ((int, off_t, off_t));
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#ifdef __cplusplus
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}
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#endif
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#endif /* _FCNTL_H */
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