c0f4656452
Also move this and android_get_device_api_level into <android/api-level.h> so that they're always available. This involves cleaning up <sys/cdefs.h> slightly. Bug: N/A Test: builds Change-Id: I25435c55f3549cd0d827a7581bee75ea8228028b
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*
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* Copyright (C) 2016 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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/**
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* @file bits/ioctl.h
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* @brief The ioctl() function.
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*/
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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/**
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* [ioctl(2)](http://man7.org/linux/man-pages/man2/ioctl.2.html) operates on device files.
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*/
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int ioctl(int __fd, int __request, ...);
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/*
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* Work around unsigned -> signed conversion warnings: many common ioctl
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* constants are unsigned.
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*
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* Since this workaround introduces an overload to ioctl, it's possible that it
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* will break existing code that takes the address of ioctl. If such a breakage
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* occurs, you can work around it by either:
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* - specifying a concrete, correct type for ioctl (whether it be through a cast
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* in `(int (*)(int, int, ...))ioctl`, creating a temporary variable with the
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* type of the ioctl you prefer, ...), or
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* - defining BIONIC_IOCTL_NO_SIGNEDNESS_OVERLOAD, which will make the
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* overloading go away.
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*/
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#if !defined(BIONIC_IOCTL_NO_SIGNEDNESS_OVERLOAD)
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/* enable_if(1) just exists to break overloading ties. */
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int ioctl(int __fd, unsigned __request, ...) __overloadable __enable_if(1, "") __RENAME(ioctl);
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#endif
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__END_DECLS
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