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                 struct _page *next;
00101                 size_t used;
00102         } *page;
00103 
00104 protected:
00114         virtual void* first(size_t size);
00115 
00123         virtual void* alloc(size_t size);
00124 
00134         char* first(char *str);
00135 
00145         char* alloc(const char *str);
00146 
00156         MemPager(size_t pagesize = 4096);
00157 
00161         void purge(void);
00162 
00166         void clean(void);
00167 
00171         virtual ~MemPager();
00172 
00173 public:
00180         inline int getPages(void)
00181                 {return pages;};
00182 };
00183 
00193 class __EXPORT StackPager : protected MemPager
00194 {
00195 private:
00196         typedef struct frame {
00197                 struct frame *next;
00198                 char data[1];
00199         }       frame_t;
00200 
00201         frame_t *stack;
00202 
00203 public:
00209         StackPager(size_t pagesize);
00210 
00218         void *push(const void *object, size_t size);
00219 
00226         void *push(const char *string);
00227 
00233         void *pull(void);
00234 
00238         void purge(void);
00239 };
00240 
00249 class __EXPORT SharedMemPager : public MemPager, public Mutex
00250 {
00251 protected:
00258         SharedMemPager(size_t pagesize = 4096, const char *name = NULL);
00259 
00263         void purge(void);
00264 
00271         void* first(size_t size);
00272 
00279         void* alloc(size_t size);
00280 };
00281 
00282 __EXPORT void endKeydata(void);
00283 
00351 class __EXPORT Keydata : protected MemPager
00352 {
00353 public:
00354 #ifdef  CCXX_PACKED
00355 #pragma pack(1)
00356 #endif
00357 
00358         struct Keyval {
00359                 Keyval *next;
00360                 char val[1];
00361         };
00362 
00363         struct Keysym {
00364                 Keysym *next;
00365                 Keyval *data;
00366                 const char **list;
00367                 short count;
00368                 char sym[1];
00369         };
00370 
00371         struct Define {
00372                 char *keyword;
00373                 char *value;
00374         };
00375 
00376 #ifdef  CCXX_PACKED
00377 #pragma pack()
00378 #endif
00379 
00380 private:
00381         static std::ifstream *cfgFile;
00382         static char lastpath[KEYDATA_PATH_SIZE + 1];
00383         static int count;
00384         static int sequence;
00385 
00386         int link;
00387 
00388         Keysym *keys[KEYDATA_INDEX_SIZE];
00389 
00396         unsigned getIndex(const char *sym);
00397 
00398 protected:
00399         Keysym* getSymbol(const char *sym, bool create);
00400 
00401 public:
00413         void load(const char *keypath);
00414 
00428         void loadPrefix(const char *prefix, const char *keypath);
00429 
00439         void loadFile(const char *filepath, const char *keys = NULL, const char *pre = NULL);
00440 
00449         void load(Define *pairs);
00450 
00454         Keydata();
00455 
00463         Keydata(const char *keypath);
00464 
00472         Keydata(Define *pairs, const char *keypath = NULL);
00473 
00479         virtual ~Keydata();
00480 
00488         void unlink(void);
00489 
00498         int getCount(const char *sym);
00499 
00507         const char* getFirst(const char *sym);
00508 
00516         const char* getLast(const char *sym);
00517 
00524         bool isKey(const char *sym);
00525 
00533         const char *getString(const char *sym, const char *def = NULL);
00534 
00542         long getLong(const char *sym, long def = 0);
00543 
00550         bool getBool(const char *key);
00551 
00559         double getDouble(const char *key, double def = 0.);
00560 
00569         unsigned getIndex(char **data, unsigned max);
00570 
00577         unsigned getCount(void);
00578 
00587         void setValue(const char *sym, const char *data);
00588 
00596         const char * const* getList(const char *sym);
00597 
00604         void clrValue(const char *sym);
00605 
00610         inline const char *operator[](const char *keyword)
00611                 {return getLast(keyword);};
00612 
00616         static void end(void);
00617 
00622         friend inline void endKeydata(void)
00623                 {Keydata::end();};
00624 };
00625 
00633 class __EXPORT MemPagerObject
00634 {
00635 public:
00642         inline void *operator new(size_t size, MemPager &pager)
00643                 {return pager.alloc(size);};
00644 
00651         inline void *operator new[](size_t size, MemPager &pager)
00652                 {return pager.alloc(size);};
00653 
00657         inline void operator delete(void *) {};
00658 
00662         inline void operator delete[](void *) {};
00663 };
00664 
00673 class __EXPORT Assoc
00674 {
00675 private:
00676         struct entry {
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) const;
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 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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