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- ///////////////////////////////////////////////////////////////////////////////
- //
- // Copyright (C) 2010-2011 Artyom Beilis (Tonkikh) <artyomtnk@yahoo.com>
- //
- // Distributed under:
- //
- // the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- //
- // or (at your opinion) under:
- //
- // The MIT License
- // (See accompanying file MIT.txt or a copy at
- // http://www.opensource.org/licenses/mit-license.php)
- //
- ///////////////////////////////////////////////////////////////////////////////
- #define CPPDB_SOURCE
- #include <cppdb/atomic_counter.h>
- #include <string.h>
-
- #if defined(WIN32) || defined(_WIN32) || defined(__WIN32) || defined(__CYGWIN__)
-
- # include <windows.h>
- # define cppdb_atomic_set(p,v) ((p)->l=v)
- long static cppdb_atomic_add_and_fetch_impl(volatile long *v,long d)
- {
- long old,prev;
- do{
- old = *v;
- prev = InterlockedCompareExchange(v,old+d,old);
- }
- while(prev != old);
- return old+d;
- }
- # define cppdb_atomic_add_and_fetch(p,d) cppdb_atomic_add_and_fetch_impl(&(p)->l,d)
-
-
- #elif defined(CPPDB_HAVE_FREEBSD_ATOMIC)
-
- # include <sys/types.h>
- # include <machine/atomic.h>
- # define cppdb_atomic_set(p,v) ((p)->ui=v)
- # define cppdb_atomic_add_and_fetch(p,d) (atomic_fetchadd_int(&(p)->ui,d) + d)
-
-
- #elif defined(CPPDB_HAVE_SOLARIS_ATOMIC)
-
- # include <atomic.h>
- # define cppdb_atomic_set(p,v) ((p)->ui=v)
- # define cppdb_atomic_add_and_fetch(p,d) (atomic_add_int_nv(&(p)->ui,d))
-
-
- #elif defined(CPPDB_HAVE_MAC_OS_X_ATOMIC)
-
- # include <libkern/OSAtomic.h>
- # define cppdb_atomic_set(p,v) ((p)->i=v)
- # define cppdb_atomic_add_and_fetch(p,d) (OSAtomicAdd32(d,&(p)->i))
-
- #elif defined CPPDB_HAS_GCC_SYNC
-
- # define cppdb_atomic_set(p,v) ((p)->l=v)
- # define cppdb_atomic_add_and_fetch(p,d) ( __sync_add_and_fetch(&(p)->i,d) )
-
-
- # elif defined(CPPDB_HAVE_GCC_BITS_EXCHANGE_AND_ADD)
-
- # include <bits/atomicity.h>
- using __gnu_cxx::__exchange_and_add;
- # define cppdb_atomic_set(p,v) ((p)->i=v)
- # define cppdb_atomic_add_and_fetch(p,d) ( __exchange_and_add(&(p)->i,d)+d )
-
-
- #elif defined(CPPDB_HAVE_GCC_EXT_EXCHANGE_AND_ADD)
-
- # include <ext/atomicity.h>
- using __gnu_cxx::__exchange_and_add;
- # define cppdb_atomic_set(p,v) ((p)->i=v)
- # define cppdb_atomic_add_and_fetch(p,d) ( __exchange_and_add(&(p)->i,d)+d )
-
-
- #else // Failing back to pthreads
- # include <pthread.h>
- # define CPPDB_PTHREAD_ATOMIC
- #endif
-
-
- namespace cppdb {
-
- #if !defined(CPPDB_PTHREAD_ATOMIC)
- atomic_counter::atomic_counter(long value)
- {
- memset(&value_,0,sizeof(value_));
- mutex_ = 0;
- cppdb_atomic_set(&value_,value);
- }
-
- atomic_counter::~atomic_counter()
- {
- }
-
- long atomic_counter::inc()
- {
- return cppdb_atomic_add_and_fetch( &value_, 1 );
- }
-
- long atomic_counter::dec()
- {
- return cppdb_atomic_add_and_fetch( &value_, -1 );
- }
-
- long atomic_counter::get() const
- {
- return cppdb_atomic_add_and_fetch( &value_, 0 );
- }
-
- #else
-
- #define MUTEX (reinterpret_cast<pthread_mutex_t *>(mutex_))
- atomic_counter::atomic_counter(long value)
- {
- mutex_ = new pthread_mutex_t;
- pthread_mutex_init(MUTEX,0);
- value_.l=value;
- }
-
- atomic_counter::~atomic_counter()
- {
- pthread_mutex_destroy(MUTEX);
- delete MUTEX;
- mutex_ = 0;
- }
-
- long atomic_counter::inc()
- {
- pthread_mutex_lock(MUTEX);
- long result= ++value_.l;
- pthread_mutex_unlock(MUTEX);
- return result;
- }
-
- long atomic_counter::dec()
- {
- pthread_mutex_lock(MUTEX);
- long result= --value_.l;
- pthread_mutex_unlock(MUTEX);
- return result;
- }
-
- long atomic_counter::get() const
- {
- pthread_mutex_lock(MUTEX);
- long result= value_.l;
- pthread_mutex_unlock(MUTEX);
- return result;
- }
-
-
- #endif
-
-
- } // cppdb
-
-
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