LCOV - app.info - /tools/gcc-4.5/include/c++/4.5.2/ext/atomicity.h

LCOV - code coverage report
| Current view: | directory - tools/gcc-4.5/include/c++/4.5.2/ext - atomicity.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 10 | 0 | 0.0 %
| Date: | 2012-04-07 | Functions: | 3 | 0 | 0.0 %

           1                 : // Support for atomic operations -*- C++ -*-
           2                 :
           3                 : // Copyright (C) 2004, 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
           4                 : //
           5                 : // This file is part of the GNU ISO C++ Library.  This library is free
           6                 : // software; you can redistribute it and/or modify it under the
           7                 : // terms of the GNU General Public License as published by the
           8                 : // Free Software Foundation; either version 3, or (at your option)
           9                 : // any later version.
          10                 :
          11                 : // This library is distributed in the hope that it will be useful,
          12                 : // but WITHOUT ANY WARRANTY; without even the implied warranty of
          13                 : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
          14                 : // GNU General Public License for more details.
          15                 :
          16                 : // Under Section 7 of GPL version 3, you are granted additional
          17                 : // permissions described in the GCC Runtime Library Exception, version
          18                 : // 3.1, as published by the Free Software Foundation.
          19                 :
          20                 : // You should have received a copy of the GNU General Public License and
          21                 : // a copy of the GCC Runtime Library Exception along with this program;
          22                 : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
          23                 : // <http://www.gnu.org/licenses/>.
          24                 :
          25                 : /** @file atomicity.h
          26                 :  *  This is an internal header file, included by other library headers.
          27                 :  *  You should not attempt to use it directly.
          28                 :  */
          29                 :
          30                 : #ifndef _GLIBCXX_ATOMICITY_H
          31                 : #define _GLIBCXX_ATOMICITY_H    1
          32                 :
          33                 : #include <bits/c++config.h>
          34                 : #include <bits/gthr.h>
          35                 : #include <bits/atomic_word.h>
          36                 :
          37                 : _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
          38                 :
          39                 :   // Functions for portable atomic access.
          40                 :   // To abstract locking primitives across all thread policies, use:
          41                 :   // __exchange_and_add_dispatch
          42                 :   // __atomic_add_dispatch
          43                 : #ifdef _GLIBCXX_ATOMIC_BUILTINS_4
          44                 :   static inline _Atomic_word
          45               0 :   __exchange_and_add(volatile _Atomic_word* __mem, int __val)
          46               0 :   { return __sync_fetch_and_add(__mem, __val); }
          47                 :
          48                 :   static inline void
          49                 :   __atomic_add(volatile _Atomic_word* __mem, int __val)
          50                 :   { __sync_fetch_and_add(__mem, __val); }
          51                 : #else
          52                 :   _Atomic_word
          53                 :   __attribute__ ((__unused__))
          54                 :   __exchange_and_add(volatile _Atomic_word*, int) throw ();
          55                 :
          56                 :   void
          57                 :   __attribute__ ((__unused__))
          58                 :   __atomic_add(volatile _Atomic_word*, int) throw ();
          59                 : #endif
          60                 :
          61                 :   static inline _Atomic_word
          62               0 :   __exchange_and_add_single(_Atomic_word* __mem, int __val)
          63                 :   {
          64               0 :     _Atomic_word __result = *__mem;
          65               0 :     *__mem += __val;
          66               0 :     return __result;
          67                 :   }
          68                 :
          69                 :   static inline void
          70                 :   __atomic_add_single(_Atomic_word* __mem, int __val)
          71                 :   { *__mem += __val; }
          72                 :
          73                 :   static inline _Atomic_word
          74                 :   __attribute__ ((__unused__))
          75               0 :   __exchange_and_add_dispatch(_Atomic_word* __mem, int __val)
          76                 :   {
          77                 : #ifdef __GTHREADS
          78               0 :     if (__gthread_active_p())
          79               0 :       return __exchange_and_add(__mem, __val);
          80                 :     else
          81               0 :       return __exchange_and_add_single(__mem, __val);
          82                 : #else
          83                 :     return __exchange_and_add_single(__mem, __val);
          84                 : #endif
          85                 :   }
          86                 :
          87                 :   static inline void
          88                 :   __attribute__ ((__unused__))
          89                 :   __atomic_add_dispatch(_Atomic_word* __mem, int __val)
          90                 :   {
          91                 : #ifdef __GTHREADS
          92                 :     if (__gthread_active_p())
          93                 :       __atomic_add(__mem, __val);
          94                 :     else
          95                 :       __atomic_add_single(__mem, __val);
          96                 : #else
          97                 :     __atomic_add_single(__mem, __val);
          98                 : #endif
          99                 :   }
         100                 :
         101                 : _GLIBCXX_END_NAMESPACE
         102                 :
         103                 : // Even if the CPU doesn't need a memory barrier, we need to ensure
         104                 : // that the compiler doesn't reorder memory accesses across the
         105                 : // barriers.
         106                 : #ifndef _GLIBCXX_READ_MEM_BARRIER
         107                 : #define _GLIBCXX_READ_MEM_BARRIER __asm __volatile ("":::"memory")
         108                 : #endif
         109                 : #ifndef _GLIBCXX_WRITE_MEM_BARRIER
         110                 : #define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
         111                 : #endif
         112                 :
         113                 : #endif

Generated by: LCOV version 1.7