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Diffstat (limited to 'ext/systemc/src/sysc/communication/sc_host_mutex.h')
-rw-r--r-- | ext/systemc/src/sysc/communication/sc_host_mutex.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/communication/sc_host_mutex.h b/ext/systemc/src/sysc/communication/sc_host_mutex.h new file mode 100644 index 000000000..58f1c4c3a --- /dev/null +++ b/ext/systemc/src/sysc/communication/sc_host_mutex.h @@ -0,0 +1,160 @@ +/***************************************************************************** + + Licensed to Accellera Systems Initiative Inc. (Accellera) under one or + more contributor license agreements. See the NOTICE file distributed + with this work for additional information regarding copyright ownership. + Accellera licenses this file to you under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with the + License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + *****************************************************************************/ + +/***************************************************************************** + + sc_host_mutex.h -- A "real" mutex for the underlying host system + + Original Author: Philipp A. Hartmann, OFFIS + + CHANGE LOG AT THE END OF THE FILE + *****************************************************************************/ + +#ifndef SC_HOST_MUTEX_H_INCLUDED_ +#define SC_HOST_MUTEX_H_INCLUDED_ + +#ifndef SC_INCLUDE_WINDOWS_H +# define SC_INCLUDE_WINDOWS_H // include Windows.h, if needed +#endif +#include "sysc/kernel/sc_cmnhdr.h" +#include "sysc/communication/sc_mutex_if.h" + +#if defined(WIN32) || defined(_WIN32) + +#define SC_MTX_TYPE_ CRITICAL_SECTION + +#define SC_MTX_INIT_( Mutex ) \ + InitializeCriticalSection( &(Mutex) ) +#define SC_MTX_LOCK_( Mutex ) \ + EnterCriticalSection( &(Mutex) ) +#define SC_MTX_UNLOCK_( Mutex ) \ + LeaveCriticalSection( &(Mutex) ) +#define SC_MTX_TRYLOCK_( Mutex ) \ + ( TryEnterCriticalSection( &(Mutex) ) != 0 ) +#define SC_MTX_DESTROY_( Mutex ) \ + DeleteCriticalSection( &(Mutex) ) + +#else // use pthread mutex + +#include <pthread.h> +#define SC_MTX_TYPE_ pthread_mutex_t + +#if defined(__hpux) +# define SC_PTHREAD_NULL_ cma_c_null +#else // !defined(__hpux) +# define SC_PTHREAD_NULL_ NULL +#endif + +#define SC_MTX_INIT_( Mutex ) \ + pthread_mutex_init( &(Mutex), SC_PTHREAD_NULL_ ) +#define SC_MTX_LOCK_( Mutex ) \ + pthread_mutex_lock( &(Mutex) ) +#define SC_MTX_UNLOCK_( Mutex ) \ + pthread_mutex_unlock( &(Mutex) ) + +#ifdef _XOPEN_SOURCE +# define SC_MTX_TRYLOCK_( Mutex ) \ + ( pthread_mutex_trylock( &(Mutex) ) == 0 ) +#else // no try_lock available +# define SC_MTX_TRYLOCK_( Mutex ) \ + ( false ) +#endif + +#define SC_MTX_DESTROY_( Mutex ) \ + pthread_mutex_destroy( &(Mutex) ) + +#endif + +namespace sc_core { + +// ---------------------------------------------------------------------------- +// CLASS : sc_host_mutex +// +// The sc_host_mutex class, wrapping an OS mutex on the simulation host +// ---------------------------------------------------------------------------- + +class sc_host_mutex : public sc_mutex_if +{ + typedef SC_MTX_TYPE_ underlying_type; +public: + + // constructors and destructor + + sc_host_mutex() + { SC_MTX_INIT_(m_mtx); } + virtual ~sc_host_mutex() + { SC_MTX_DESTROY_(m_mtx); } + + + // interface methods + + // blocks until mutex could be locked + virtual int lock() + { SC_MTX_LOCK_(m_mtx); return 0; } + + // returns -1 if mutex could not be locked + virtual int trylock() + { return SC_MTX_TRYLOCK_(m_mtx) ? 0 : -1; } + + // should return -1 if mutex was not locked by caller, + // but is not yet able to check this + virtual int unlock() + { SC_MTX_UNLOCK_(m_mtx); return 0; } + +private: + underlying_type m_mtx; +}; + +} // namespace sc_core + +#undef SC_MTX_TYPE_ +#undef SC_MTX_INIT_ +#undef SC_MTX_DESTROY_ +#undef SC_MTX_LOCK_ +#undef SC_MTX_TRYLOCK_ +#undef SC_MTX_UNLOCK_ +#undef SC_PTHREAD_NULL_ + +/***************************************************************************** + + MODIFICATION LOG - modifiers, enter your name, affiliation, date and + changes you are making here. + + Name, Affiliation, Date: + Description of Modification: + *****************************************************************************/ +//$Log: sc_host_mutex.h,v $ +//Revision 1.4 2011/08/30 21:53:23 acg +// Jerome Cornet: include window.h for gnu c in windows case. +// +//Revision 1.3 2011/08/07 19:08:01 acg +// Andy Goodrich: moved logs to end of file so line number synching works +// better between versions. +// +//Revision 1.2 2011/06/25 17:08:38 acg +// Andy Goodrich: Jerome Cornet's changes to use libtool to build the +// library. +// +//Revision 1.1 2011/04/18 19:04:11 acg +// Philipp A. Hartmann: first check in of file. +// + +#endif + +// Taf! |