| /* |
| * 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. |
| |
| // __set_errno was mistakenly exposed in <errno.h> in the 32-bit NDK. |
| // We need the extra level of indirection so that the .hidden directives |
| // in the system call stubs don't cause __set_errno to be hidden, breaking |
| // 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; |
| } |
| |
| // This one exists for the LP32 NDK and is not present at all in LP64. |
| #if !defined(__LP64__) |
| extern "C" long __set_errno(int n) { |
| return __set_errno_internal(n); |
| } |
| #endif |