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Diffstat (limited to 'ext/systemc/src/sysc/communication/sc_semaphore.h')
| -rw-r--r-- | ext/systemc/src/sysc/communication/sc_semaphore.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/ext/systemc/src/sysc/communication/sc_semaphore.h b/ext/systemc/src/sysc/communication/sc_semaphore.h new file mode 100644 index 000000000..3ce991ebf --- /dev/null +++ b/ext/systemc/src/sysc/communication/sc_semaphore.h @@ -0,0 +1,133 @@ +/***************************************************************************** + + 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_semaphore.h -- The sc_semaphore primitive channel class. + + Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21 + + CHANGE LOG IS AT THE END OF THE FILE + *****************************************************************************/ + +#ifndef SC_SEMAPHORE_H +#define SC_SEMAPHORE_H + + +#include "sysc/kernel/sc_event.h" +#include "sysc/kernel/sc_object.h" +#include "sysc/communication/sc_semaphore_if.h" + +namespace sc_core { + +// ---------------------------------------------------------------------------- +// CLASS : sc_semaphore +// +// The sc_semaphore primitive channel class. +// ---------------------------------------------------------------------------- + +class sc_semaphore +: public sc_semaphore_if, + public sc_object +{ +public: + + // constructors + + explicit sc_semaphore( int init_value_ ); + sc_semaphore( const char* name_, int init_value_ ); + + + // interface methods + + // lock (take) the semaphore, block if not available + virtual int wait(); + + // lock (take) the semaphore, return -1 if not available + virtual int trywait(); + + // unlock (give) the semaphore + virtual int post(); + + // get the value of the semaphore + virtual int get_value() const + { return m_value; } + + virtual const char* kind() const + { return "sc_semaphore"; } + +protected: + + // support methods + + bool in_use() const + { return ( m_value <= 0 ); } + + + // error reporting + void report_error( const char* id, const char* add_msg = 0 ) const; + +protected: + + sc_event m_free; // event to block on when m_value is negative + int m_value; // current value of the semaphore + +private: + + // disabled + sc_semaphore( const sc_semaphore& ); + sc_semaphore& operator = ( const sc_semaphore& ); +}; + +} // namespace sc_core + +//$Log: sc_semaphore.h,v $ +//Revision 1.4 2011/08/26 20:45:42 acg +// Andy Goodrich: moved the modification log to the end of the file to +// eliminate source line number skew when check-ins are done. +// +//Revision 1.3 2011/02/18 20:23:45 acg +// Andy Goodrich: Copyright update. +// +//Revision 1.2 2010/11/02 16:31:01 acg +// Andy Goodrich: changed object derivation to use sc_object rather than +// sc_prim_channel as the parent class. +// +//Revision 1.1.1.1 2006/12/15 20:20:04 acg +//SystemC 2.3 +// +//Revision 1.4 2006/11/28 20:30:49 acg +// Andy Goodrich: updated from 2.2 source. sc_event_queue constructors +// collapsed into a single constructor with an optional argument to get +// the sc_module_name stack done correctly. Class name prefixing added +// to sc_semaphore calls to wait() to keep gcc 4.x happy. +// +//Revision 1.2 2006/01/03 23:18:26 acg +//Changed copyright to include 2006. +// +//Revision 1.1.1.1 2005/12/19 23:16:43 acg +//First check in of SystemC 2.1 into its own archive. +// +//Revision 1.9 2005/06/10 22:43:55 acg +//Added CVS change log annotation. +// + +#endif + +// Taf! |