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 
00347 void endKeydata(void);
00348 
00349 class __EXPORT Keydata : protected MemPager
00350 {
00351 public:
00352 #ifdef  CCXX_PACKED
00353 #pragma pack(1)
00354 #endif
00355 
00356         struct Keyval
00357         {
00358                 Keyval *next;
00359                 char val[1];
00360         };
00361 
00362         struct Keysym
00363         {
00364                 Keysym *next;
00365                 Keyval *data;
00366                 const char **list;
00367                 short count;
00368                 char sym[1];
00369         };
00370 
00371         struct Define
00372         {
00373                 char *keyword;
00374                 char *value;
00375         };
00376 
00377 #ifdef  CCXX_PACKED
00378 #pragma pack()
00379 #endif
00380 
00381 private:
00382         static std::ifstream *cfgFile;
00383         static char lastpath[KEYDATA_PATH_SIZE + 1];
00384         static int count;
00385         static int sequence;
00386 
00387         int link;
00388 
00389         Keysym *keys[KEYDATA_INDEX_SIZE];
00390 
00397         unsigned getIndex(const char *sym);
00398 
00399 protected:
00400         Keysym* getSymbol(const char *sym, bool create);
00401 
00402 public:
00414         void load(const char *keypath);
00415 
00429         void loadPrefix(const char *prefix, const char *keypath);
00430 
00440         void loadFile(const char *filepath, const char *keys = NULL, const char *pre = NULL);
00441 
00450         void load(Define *pairs);
00451         
00455         Keydata();
00456 
00464         Keydata(const char *keypath);
00465 
00473         Keydata(Define *pairs, const char *keypath = NULL);
00474 
00480         virtual ~Keydata();
00481 
00489         void unlink(void);
00490 
00499         int getCount(const char *sym);
00500 
00508         const char* getFirst(const char *sym);
00509 
00517         const char* getLast(const char *sym);
00518 
00525         bool isKey(const char *sym);
00526 
00534         const char *getString(const char *sym, const char *def = NULL);
00535 
00543         long getLong(const char *sym, long def = 0);
00544 
00551         bool getBool(const char *key);
00552 
00560         double getDouble(const char *key, double def = 0.); 
00561 
00570         unsigned getIndex(char **data, unsigned max);
00571 
00578         unsigned getCount(void);
00579 
00588         void setValue(const char *sym, const char *data);
00589 
00597         const char * const* getList(const char *sym);
00598 
00605         void clrValue(const char *sym);
00606 
00611         inline const char *operator[](const char *keyword)
00612                 {return getLast(keyword);};
00613 
00617         static void end(void);
00618 
00623         friend inline void endKeydata(void)
00624                 {Keydata::end();};
00625 };
00626 
00634 class __EXPORT MemPagerObject
00635 {
00636 public:
00643         inline void *operator new(size_t size, MemPager &pager)
00644                 {return pager.alloc(size);};
00645 
00652         inline void *operator new[](size_t size, MemPager &pager)
00653                 {return pager.alloc(size);};
00654 
00658         inline void operator delete(void *) {};
00659 
00663         inline void operator delete[](void *) {};
00664 };
00665 
00674 class __EXPORT Assoc
00675 {
00676 private:
00677         class __EXPORT entry
00678         {
00679         public:
00680                 const char *id;
00681                 entry *next;
00682                 void *data;
00683         };
00684 
00685         entry *entries[KEYDATA_INDEX_SIZE];
00686 
00687 protected:
00688         Assoc();
00689         virtual ~Assoc();
00690 
00691         void clear(void);
00692 
00693         virtual void *getMemory(size_t size) = 0;
00694 
00695 public:
00696         void *getPointer(const char *id);
00697         void setPointer(const char *id, void *data);
00698 };
00699 
00710 class __EXPORT Runlist : public Mutex
00711 {
00712 private:
00713         Runable *first, *last;
00714 
00715 protected:
00716         unsigned limit, used;
00717         void check(void);
00718 
00719 public:
00725         Runlist(unsigned count = 1);
00726         
00735         bool add(Runable *run);
00736 
00743         void del(Runable *run);
00744 
00750         void set(unsigned limit);
00751 };
00752 
00759 class __EXPORT Runable
00760 {
00761 private:
00762         friend class __EXPORT Runlist;
00763         Runlist *list;
00764         Runable *next, *prev;
00765 
00766 protected:
00767         Runable();
00768         virtual ~Runable();
00769 
00774         virtual void ready(void) = 0;
00775 
00776 public:
00783         bool starting(Runlist *list);
00784         
00790         void stoping(void);
00791 };
00792 
00793 #ifdef  CCXX_NAMESPACES
00794 }
00795 #endif
00796 
00797 #endif
00798 

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