/usr/include/ace/OS_Errno.h is in libace-dev 6.0.3+dfsg-0.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | // -*- C++ -*-
//=============================================================================
/**
* @file OS_Errno.h
*
* $Id: OS_Errno.h 83891 2008-11-28 11:01:50Z johnnyw $
*
* @author (Originally in OS.h)Doug Schmidt <schmidt@cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_OS_ERRNO_H
#define ACE_OS_ERRNO_H
#include /**/ "ace/pre.h"
#include /**/ "ace/ACE_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/OS_NS_errno.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class ACE_Errno_Guard
*
* @brief Provides a wrapper to improve performance when thread-specific
* errno must be saved and restored in a block of code.
*
* The typical use-case for this is the following:
* int error = errno;
* call_some_function_that_might_change_errno ();
* errno = error;
* This can be replaced with
* {
* ACE_Errno_Guard guard (errno);
* call_some_function_that_might_change_errno ();
* }
* This implementation is more elegant and more efficient since it
* avoids an unnecessary second access to thread-specific storage
* by caching a pointer to the value of errno in TSS.
*/
class ACE_Export ACE_Errno_Guard
{
public:
/// Stash the value of @a error into @c error_ and initialize the
/// @c errno_ptr_ to the address of @a errno_ref.
ACE_Errno_Guard (ACE_ERRNO_TYPE &errno_ref,
int error);
/// Initialize the @c errno_ptr_ to the address of @a errno_ref.
ACE_Errno_Guard (ACE_ERRNO_TYPE &errno_ref);
/// Reset the value of @c errno to <error>.
~ACE_Errno_Guard (void);
#if defined (ACE_HAS_WINCE_BROKEN_ERRNO)
/// Assign @a errno_ref to <error_>.
int operator= (const ACE_ERRNO_TYPE &errno_ref);
#endif /* ACE_HAS_WINCE_BROKEN_ERRNO */
/// Assign <error> to <error_>.
int operator= (int error);
/// Compare <error> with <error_> for equality.
bool operator== (int error);
/// Compare <error> with <error_> for inequality.
bool operator!= (int error);
private:
// Prevent copying
ACE_Errno_Guard (const ACE_Errno_Guard &);
ACE_Errno_Guard &operator= (const ACE_Errno_Guard &);
#if defined (ACE_MT_SAFE)
ACE_ERRNO_TYPE *errno_ptr_;
#endif /* ACE_MT_SAFE */
int error_;
};
ACE_END_VERSIONED_NAMESPACE_DECL
// Inlining this class on debug builds with gcc on Solaris can cause
// deadlocks during static initialization. On non debug builds it
// causes compilation errors.
#if defined (ACE_HAS_INLINED_OSCALLS) && \
(!defined (__GNUG__) || !defined (__sun__))
# if defined (ACE_INLINE)
# undef ACE_INLINE
# endif /* ACE_INLINE */
# define ACE_INLINE inline
# include "ace/OS_Errno.inl"
#endif /* ACE_HAS_INLINED_OSCALLS */
#include /**/ "ace/post.h"
#endif /* ACE_OS_ERRNO_H */
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