misc.h

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00001 // Copyright (C) 1999-2005 Open Source Telecom Corporation.
00002 //
00003 // This program is free software; you can redistribute it and/or modify
00004 // it under the terms of the GNU General Public License as published by
00005 // the Free Software Foundation; either version 2 of the License, or
00006 // (at your option) any later version.
00007 // 
00008 // This program is distributed in the hope that it will be useful,
00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00011 // GNU General Public License for more details.
00012 //
00013 // You should have received a copy of the GNU General Public License
00014 // along with this program; if not, write to the Free Software
00015 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00016 // 
00017 // As a special exception, you may use this file as part of a free software
00018 // library without restriction.  Specifically, if other files instantiate
00019 // templates or use macros or inline functions from this file, or you compile
00020 // this file and link it with other files to produce an executable, this
00021 // file does not by itself cause the resulting executable to be covered by
00022 // the GNU General Public License.  This exception does not however    
00023 // invalidate any other reasons why the executable file might be covered by
00024 // the GNU General Public License.    
00025 //
00026 // This exception applies only to the code released under the name GNU
00027 // Common C++.  If you copy code from other releases into a copy of GNU
00028 // Common C++, as the General Public License permits, the exception does
00029 // not apply to the code that you add in this way.  To avoid misleading
00030 // anyone as to the status of such modified files, you must delete
00031 // this exception notice from them.
00032 //
00033 // If you write modifications of your own for GNU Common C++, it is your choice
00034 // whether to permit this exception to apply to your modifications.
00035 // If you do not wish that, delete this exception notice.
00036 //
00037 
00044 #ifndef CCXX_MISC_H_
00045 #define CCXX_MISC_H_
00046 
00047 #ifndef CCXX_MISSING_H_
00048 #include <cc++/missing.h>
00049 #endif
00050 
00051 #ifndef CCXX_THREAD_H_
00052 #include <cc++/thread.h>
00053 #endif
00054 
00055 #define KEYDATA_INDEX_SIZE      97
00056 #define KEYDATA_PAGER_SIZE      512
00057 
00058 #if defined(PATH_MAX)
00059 #if PATH_MAX > 512
00060 #define KEYDATA_PATH_SIZE       512
00061 #else
00062 #define KEYDATA_PATH_SIZE       PATH_MAX
00063 #endif
00064 #else
00065 #define KEYDATA_PATH_SIZE       256
00066 #endif
00067 
00068 #ifdef  CCXX_NAMESPACES
00069 namespace ost {
00070 #endif
00071 
00072 class __EXPORT Runlist;
00073 class __EXPORT Runable;
00074 
00090 class __EXPORT MemPager
00091 {
00092 private:
00093         friend class String;
00094         friend class MemPagerObject;
00095 
00096         size_t pagesize;
00097         unsigned int pages;
00098 
00099         struct _page
00100         {
00101                 struct _page *next;
00102                 size_t used;
00103         } *page;
00104 
00105 protected:
00115         virtual void* first(size_t size);
00116 
00124         virtual void* alloc(size_t size);
00125 
00135         char* first(char *str);
00136 
00146         char* alloc(const char *str);
00147 
00157         MemPager(size_t pagesize = 4096);
00158 
00162         void purge(void);
00163 
00167         virtual ~MemPager();
00168 
00169 public:
00176         inline int getPages(void)
00177                 {return pages;};
00178 };
00179 
00189 class __EXPORT StackPager : protected MemPager
00190 {
00191 private:
00192         typedef struct frame
00193         {
00194                 struct frame *next;
00195                 char data[1];
00196         }       frame_t;
00197 
00198         frame_t *stack;
00199 
00200 public:
00206         StackPager(size_t pagesize);
00207 
00215         void *push(const void *object, size_t len);
00216 
00223         void *push(const char *string);
00224 
00230         void *pull(void);
00231 
00235         void purge(void);
00236 };
00237 
00246 class __EXPORT SharedMemPager : public MemPager, public Mutex
00247 {
00248 protected:
00255         SharedMemPager(size_t pagesize = 4096, const char *name = NULL);
00256 
00260         void purge(void);
00261 
00268         void* first(size_t size);
00269 
00276         void* alloc(size_t size);
00277 };
00278 
00346 class __EXPORT Keydata : protected MemPager
00347 {
00348 public:
00349 #ifdef  CCXX_PACKED
00350 #pragma pack(1)
00351 #endif
00352 
00353         struct Keyval
00354         {
00355                 Keyval *next;
00356                 char val[1];
00357         };
00358 
00359         struct Keysym
00360         {
00361                 Keysym *next;
00362                 Keyval *data;
00363                 const char **list;
00364                 short count;
00365                 char sym[1];
00366         };
00367 
00368         struct Define
00369         {
00370                 char *keyword;
00371                 char *value;
00372         };
00373 
00374 #ifdef  CCXX_PACKED
00375 #pragma pack()
00376 #endif
00377 
00378 private:
00379         static std::ifstream *cfgFile;
00380         static char lastpath[KEYDATA_PATH_SIZE + 1];
00381         static int count;
00382         static int sequence;
00383 
00384         int link;
00385 
00386         Keysym *keys[KEYDATA_INDEX_SIZE];
00387 
00394         unsigned getIndex(const char *sym);
00395 
00396 protected:
00397         Keysym* getSymbol(const char *sym, bool create);
00398 
00399 public:
00411         void load(const char *keypath);
00412 
00426         void loadPrefix(const char *prefix, const char *keypath);
00427 
00437         void loadFile(const char *filepath, const char *keys = NULL, const char *pre = NULL);
00438 
00447         void load(Define *pairs);
00448         
00452         Keydata();
00453 
00461         Keydata(const char *keypath);
00462 
00470         Keydata(Define *pairs, const char *keypath = NULL);
00471 
00477         virtual ~Keydata();
00478 
00486         void unlink(void);
00487 
00496         int getCount(const char *sym);
00497 
00505         const char* getFirst(const char *sym);
00506 
00514         const char* getLast(const char *sym);
00515 
00524         unsigned getIndex(char **data, unsigned max);
00525 
00532         unsigned getCount(void);
00533 
00542         void setValue(const char *sym, const char *data);
00543 
00551         const char * const* getList(const char *sym);
00552 
00559         void clrValue(const char *sym);
00560 
00565         inline const char *operator[](const char *keyword)
00566                 {return getLast(keyword);};
00567 
00571         static void end(void);
00572 
00577         friend inline void endKeydata(void)
00578                 {Keydata::end();};
00579 };
00580 
00588 class __EXPORT MemPagerObject
00589 {
00590 public:
00597         inline void *operator new(size_t size, MemPager &pager)
00598                 {return pager.alloc(size);};
00599 
00606         inline void *operator new[](size_t size, MemPager &pager)
00607                 {return pager.alloc(size);};
00608 
00612         inline void operator delete(void *) {};
00613 
00617         inline void operator delete[](void *) {};
00618 };
00619 
00628 class __EXPORT Assoc
00629 {
00630 private:
00631         class __EXPORT entry
00632         {
00633         public:
00634                 const char *id;
00635                 entry *next;
00636                 void *data;
00637         };
00638 
00639         entry *entries[KEYDATA_INDEX_SIZE];
00640 
00641 protected:
00642         Assoc();
00643 
00644         void clear(void);
00645 
00646         virtual void *getMemory(size_t size) = 0;
00647 
00648 public:
00649         void *getPointer(const char *id);
00650         void setPointer(const char *id, void *data);
00651 };
00652 
00663 class __EXPORT Runlist : public Mutex
00664 {
00665 private:
00666         Runable *first, *last;
00667 
00668 protected:
00669         unsigned limit, used;
00670         void check(void);
00671 
00672 public:
00678         Runlist(unsigned count = 1);
00679         
00688         bool add(Runable *run);
00689 
00696         void del(Runable *run);
00697 
00703         void set(unsigned limit);
00704 };
00705 
00712 class __EXPORT Runable
00713 {
00714 private:
00715         friend class __EXPORT Runlist;
00716         Runlist *list;
00717         Runable *next, *prev;
00718 
00719 protected:
00720         Runable();
00721         virtual ~Runable();
00722 
00727         virtual void ready(void) = 0;
00728 
00729 public:
00736         bool starting(Runlist *list);
00737         
00743         void stoping(void);
00744 };
00745 
00746 #ifdef  CCXX_NAMESPACES
00747 }
00748 #endif
00749 
00750 #endif
00751 

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