| /***************************************************************************** |
| |
| 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. |
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| *****************************************************************************/ |
| |
| /***************************************************************************** |
| |
| 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! |