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 size);
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 
00522         bool isKey(const char *sym);
00523 
00531         const char *getString(const char *sym, const char *def = NULL);
00532 
00540         long getLong(const char *sym, long def = 0);
00541 
00548         bool getBool(const char *key);
00549 
00557         double getDouble(const char *key, double def = 0.); 
00558 
00567         unsigned getIndex(char **data, unsigned max);
00568 
00575         unsigned getCount(void);
00576 
00585         void setValue(const char *sym, const char *data);
00586 
00594         const char * const* getList(const char *sym);
00595 
00602         void clrValue(const char *sym);
00603 
00608         inline const char *operator[](const char *keyword)
00609                 {return getLast(keyword);};
00610 
00614         static void end(void);
00615 
00620         friend inline void endKeydata(void)
00621                 {Keydata::end();};
00622 };
00623 
00631 class __EXPORT MemPagerObject
00632 {
00633 public:
00640         inline void *operator new(size_t size, MemPager &pager)
00641                 {return pager.alloc(size);};
00642 
00649         inline void *operator new[](size_t size, MemPager &pager)
00650                 {return pager.alloc(size);};
00651 
00655         inline void operator delete(void *) {};
00656 
00660         inline void operator delete[](void *) {};
00661 };
00662 
00671 class __EXPORT Assoc
00672 {
00673 private:
00674         class __EXPORT entry
00675         {
00676         public:
00677                 const char *id;
00678                 entry *next;
00679                 void *data;
00680         };
00681 
00682         entry *entries[KEYDATA_INDEX_SIZE];
00683 
00684 protected:
00685         Assoc();
00686         virtual ~Assoc();
00687 
00688         void clear(void);
00689 
00690         virtual void *getMemory(size_t size) = 0;
00691 
00692 public:
00693         void *getPointer(const char *id);
00694         void setPointer(const char *id, void *data);
00695 };
00696 
00707 class __EXPORT Runlist : public Mutex
00708 {
00709 private:
00710         Runable *first, *last;
00711 
00712 protected:
00713         unsigned limit, used;
00714         void check(void);
00715 
00716 public:
00722         Runlist(unsigned count = 1);
00723         
00732         bool add(Runable *run);
00733 
00740         void del(Runable *run);
00741 
00747         void set(unsigned limit);
00748 };
00749 
00756 class __EXPORT Runable
00757 {
00758 private:
00759         friend class __EXPORT Runlist;
00760         Runlist *list;
00761         Runable *next, *prev;
00762 
00763 protected:
00764         Runable();
00765         virtual ~Runable();
00766 
00771         virtual void ready(void) = 0;
00772 
00773 public:
00780         bool starting(Runlist *list);
00781         
00787         void stoping(void);
00788 };
00789 
00790 #ifdef  CCXX_NAMESPACES
00791 }
00792 #endif
00793 
00794 #endif
00795 

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