MmapFile.h

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00001 /*
00002  *    Copyright 2006 Intel Corporation
00003  * 
00004  *    Licensed under the Apache License, Version 2.0 (the "License");
00005  *    you may not use this file except in compliance with the License.
00006  *    You may obtain a copy of the License at
00007  * 
00008  *        http://www.apache.org/licenses/LICENSE-2.0
00009  * 
00010  *    Unless required by applicable law or agreed to in writing, software
00011  *    distributed under the License is distributed on an "AS IS" BASIS,
00012  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *    See the License for the specific language governing permissions and
00014  *    limitations under the License.
00015  */
00016 
00017 #ifndef _MMAPFILE_H_
00018 #define _MMAPFILE_H_
00019 
00020 #include <sys/types.h>
00021 #include <sys/mman.h>
00022 #include "../debug/Log.h"
00023 
00024 namespace oasys {
00025 
00030 class MmapFile : public Logger {
00031 public:
00035     MmapFile(const char* logpath);
00036 
00040     virtual ~MmapFile();
00041 
00047     void* map(const char* filename, int prot, int flags, 
00048               size_t len = 0, off_t offset = 0);
00049     
00055     bool unmap();
00056 
00058     void*  ptr() { return ptr_; }
00059     size_t len() { return len_; }
00061 
00062 private:
00064     void* ptr_;
00065 
00067     size_t len_;
00068 };
00069 
00070 } // namespace oasys
00071 
00072 
00073 #endif /* _MMAPFILE_H_ */

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