48 lines
2.2 KiB
C++
48 lines
2.2 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
|
|
// This function is called from our assembler syscall stubs.
|
|
// C/C++ code should just assign 'errno' instead.
|
|
|
|
// The return type is 'long' because we use the same routine in calls
|
|
// that return an int as in ones that return a ssize_t. On a 32-bit
|
|
// system these are the same size, but on a 64-bit system they're not.
|
|
// 'long' gives us 32-bit on 32-bit systems, 64-bit on 64-bit systems.
|
|
|
|
// Since __set_errno was mistakenly exposed in <errno.h> in the 32-bit
|
|
// NDK, use a differently named internal function for the system call
|
|
// stubs. This avoids having the stubs .hidden directives accidentally
|
|
// hide __set_errno for old NDK apps.
|
|
|
|
// This one is for internal use only and used by both LP32 and LP64 assembler.
|
|
extern "C" __LIBC_HIDDEN__ long __set_errno_internal(int n) {
|
|
errno = n;
|
|
return -1;
|
|
}
|