--- parser3/src/include/pa_pool.h 2001/03/10 16:34:35 1.27 +++ parser3/src/include/pa_pool.h 2003/02/14 16:52:21 1.86.2.28 @@ -1,128 +1,384 @@ -/* - Parser - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan +/** @file + Parser: Parser: reference counting classes decls. - $Id: pa_pool.h,v 1.27 2001/03/10 16:34:35 paf Exp $ + Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) + + Author: Alexandr Petrosian (http://paf.design.ru) */ #ifndef PA_POOL_H #define PA_POOL_H -#include +static const char* IDENT_POOL_H="$Date: 2003/02/14 16:52:21 $"; + +// include + +#include "pa_config_includes.h" + +#ifdef XML +# include "gdome.h" +// for xmlChar +# include "libxml/tree.h" +#endif + +// forwards + +void *pa_malloc(size_t size); +void *pa_calloc(size_t size); +void pa_free(void *ptr); +void *pa_realloc(void *ptr, size_t size); class Exception; -class Temp_exception; +class String; +class Charset; +class GdomeDOMString_auto_ptr; + +/* * + Pool mechanizm allows users not to free up allocated memory, + leaving that problem to 'pools'. + + @see Pooled +* / class Pool { - friend Temp_exception; public: - Pool() : fexception(0) {} - ~Pool() {} + Pool(void *astorage); - Exception& exception() const { return *fexception; } - - void *malloc(size_t size) { - return check(real_malloc(size), size); + //{@ statistics + size_t total_allocated() { return ftotal_allocated; } + unsigned int total_times() { return ftotal_times; } + //}@ + + void set_context(void *acontext) { fcontext=acontext; } + void *get_context() { return fcontext; } + + /// allocates some bytes on pool + void *malloc(size_t size, int place=0) { + return check(real_malloc(size, place), size); } + /// allocates some bytes clearing them with zeros void *calloc(size_t size) { return check(real_calloc(size), size); } -private: // implementation defined + /// registers a routine to clean up non-pooled allocations + void register_cleanup(void (*cleanup) (void *), void *data) { + if(!real_register_cleanup(cleanup, data)) + fail_register_cleanup(); + } + + //{@ helpers + void *copy(const void *buf, const size_t size); + char *copy(const char* cstr); + //}@ + + //{@ source charset + void set_source_charset(Charset& acharset); + Charset& get_source_charset(); + //}@ + + //{@ client charset + void set_client_charset(Charset& charset); + Charset& get_client_charset(); + //}@ + +#ifdef XML + + /// @see Charset::transcode_cstr(xmlChar *s); + const char* transcode_cstr(xmlChar *s); + /// @see Charset::transcode(xmlChar *s); + String& transcode(xmlChar *s +#ifndef NO_STRING_ORIGIN + , const String *origin +#endif + ); + /// @see Charset::transcode_cstr(GdomeDOMString *s); + const char* transcode_cstr(GdomeDOMString *s); + /// @see Charset::transcode(GdomeDOMString *s); + String& transcode(GdomeDOMString *s +#ifndef NO_STRING_ORIGIN + , const String *origin +#endif + ); + /// @see Charset::transcode_cstr(const char* buf, size_t buf_size=0); + xmlChar *transcode_buf2xchar(const char* buf, size_t buf_size=0); + /// @see Charset::transcode(const String& s) + GdomeDOMString_auto_ptr transcode(const String& s); + +#endif + +private: + + void *fstorage; + void *fcontext; + Charset *source_charset; + Charset *client_charset; - void *real_malloc(size_t size); +private: + + //{ + /// @name implementation defined + void *real_malloc(size_t size, int place); void *real_calloc(size_t size); + bool real_register_cleanup(void (*cleanup) (void *), void *data); + //} private: - // checks whether mem allocated OK. throws exception otherwise + /// checks whether mem allocated OK. throws exception otherwise void *check(void *ptr, size_t size) { - if(ptr) + if(ptr) { + ftotal_allocated+=size; + ftotal_times++; return ptr; + } - fail(size); + fail_alloc(size); // never reached return 0; } - // throws proper exception - void fail(size_t size) const; - -protected: // exception handling - - // exception replacement mechanism is 'protected' from direct usage - // Temp_exception_change object enforces paired set/restore - Exception *set_exception(Exception *e){ - Exception *r=fexception; - fexception=e; - return r; - } - void restore_exception(Exception *e) { - fexception=e; - } + /// throws allocation exception + void fail_alloc(size_t size) const; -private: + /// throws register cleanup exception + void fail_register_cleanup() const; - // current request's exception object - Exception *fexception; +private: // statistics + + size_t ftotal_allocated; + unsigned int ftotal_times; private: //disabled - // Pool(const Pool&) {} - Pool& operator = (const Pool&) { return *this; } + Pool(const Pool&); + Pool& operator= (const Pool&); }; +*/ + + +/** + Base for all classes that are allocated in 'pools'. + Holds Pool object. Contains useful wrappers to it's methods. + + @see NEW +* / + +// all classes that are members parents of packed class [String] +// sould be packed also to avoid sparc odd st/lduh problem +#include "pa_pragma_pack_begin.h" class Pooled { // the pool i'm allocated on - Pool& fpool; + Pool *fpool; public: - + + /// the Pooled-sole: Pooled instances can be allocated in Pool rather then on heap static void *operator new(size_t size, Pool& apool) { - return apool.malloc(size); + return apool.malloc(size, 1); } - Pooled(Pool& apool) : fpool(apool) { - } + Pooled(Pool& apool) : fpool(&apool) {} - Pool& pool() const { return fpool; } + /// my pool + Pool& pool() const { return *fpool; } - void *malloc(size_t size) const { return fpool.malloc(size); } - void *calloc(size_t size) const { return fpool.calloc(size); } - Exception& exception() const { return fpool.exception(); } + /** used for moving objects from one pool to another. + in between object can have no pool and can not be used + @see SQL_Driver_manager + * / + void set_pool(Pool *apool) { fpool=apool; } + + //{ + /// @name useful wrapper around pool + void *malloc(size_t size, int place=0) const { return fpool->malloc(size, place); } + void *calloc(size_t size) const { return fpool->calloc(size); } + void register_cleanup(void (*cleanup) (void *), void *data) { fpool->register_cleanup(cleanup, data); } + void *copy(const void *buf, const size_t size) { return fpool->copy(buf, size); } + char *copy(const char* cstr) { return fpool->copy(cstr); } +#ifdef XML + + const char* transcode_cstr(GdomeDOMString *s) { return fpool->transcode_cstr(s); } + String& transcode(GdomeDOMString *s +#ifndef NO_STRING_ORIGIN + , const String *origin +#endif + ) { + return fpool->transcode(s +#ifndef NO_STRING_ORIGIN + , origin +#endif + ); + } + +#endif + //} }; +#include "pa_pragma_pack_end.h" +/// useful macro for creating objects on current Pooled object Pooled::pool() #define NEW new(pool()) +*/ -class Temp_exception { - Pool pool; - Exception *saved_exception; -public: - Temp_exception(Pool& apool, Exception& exception) : - pool(apool), - saved_exception(apool.set_exception(&exception)) { + +template class object_ptr { + T *ptr; +public: + typedef T element_type; + + explicit object_ptr(T *ptr = 0) { + this->ptr=ptr; + if(ptr) + ptr->ref(); + } + template object_ptr(const object_ptr& src) { + this->ptr=src.get(); + if(ptr) + ptr->ref(); + } + object_ptr(const object_ptr& src) { + ptr=src.get(); + ptr->ref(); + } + object_ptr(T *ptr, int) { + this->ptr=ptr; + } + object_ptr& operator=(const object_ptr& src) { + if(this!=&src) + if(ptr!=src.get()) { + if(ptr) + ptr->unref(); + ptr=src.get(); + if(ptr) + ptr->ref(); + } + return *this; + } + ~object_ptr() { + if(ptr) + ptr->unref(); + } + T& operator*() const { + return *get(); + } + T *operator->() const { + return get(); + } + T *get() const { + return ptr; + } + operator bool() const { + return get()!=0; } - ~Temp_exception() { - pool.restore_exception(saved_exception); + bool operator !() const { + return get()==0; } }; -#define TRY \ - { \ - Exception temp_exception; \ - Temp_exception le(pool(), temp_exception); \ - if(setjmp(temp_exception.mark)==0) - -#define THROW exception()._throw -#define POOL_THROW pool.exception()._throw -#define CATCH(e) \ - else{ \ - Exception& e=temp_exception; +#define DECLARE_OBJECT_PTR(name) \ + typedef object_ptr name##Ptr -#define END_CATCH \ - } \ +// typedef object_ptr name##Ptr; \ +// const object_ptr name##PtrZero(0); + +/// TEMPLATE CLASS smart_ptr, stolen from stl:auto_ptr & renamed field/params [not compiled on gcc] +template + class smart_ptr { + bool owns; + T *ptr; +public: + typedef T element_type; + explicit smart_ptr(T *aptr = 0) + : owns(aptr != 0), ptr(aptr) {} + smart_ptr(const smart_ptr& src) + : owns(src.owns), ptr(src.release()) {} + smart_ptr& operator=(const smart_ptr& src) + {if (this != &src) + {if (ptr != src.get()) + {if (owns) + delete ptr; + owns = src.owns; } + else if (src.owns) + owns = true; + ptr = src.release(); } + return (*this); } + ~smart_ptr() + {if (owns) + delete ptr; } + T& operator*() const + {return (*get()); } + T *get() const + {return ptr; } + T *release() const + {((smart_ptr *)this)->owns = false; + return (ptr); } + operator bool() const { + return get()!=0; + } + operator T*() const { + return ptr; } -// usage: -// TRY { ...; if(?) RAISE(?); ...; } CATCH(e) { catch-code e.comment() } END_CATCH + }; + +// defines + +#define override +#define rethrow throw + +// memory + +inline void *operator new[] (size_t size) { + return pa_malloc(size); +} +inline void operator delete[] (void *ptr) { + pa_free(ptr); +} + +class PA_Allocated { +public: + /// the sole: instances allocated using our functions + static void *operator new(size_t size) { + return pa_malloc(size); + } + static void operator delete(void *ptr) { + pa_free(ptr); + } + static void *malloc(size_t size) { + return pa_malloc(size); + } + static void *calloc(size_t size) { + return pa_calloc(size); + } + static void *realloc(void *ptr, size_t size) { + return pa_realloc(ptr, size); + } + +}; + +/** + Base for all Parser classes, memory allocation/dallocation goes via pa_malloc/pa_free. +*/ +class PA_Object: public PA_Allocated { + mutable unsigned long freferences; +public: + PA_Object(): freferences(0) {} + virtual ~PA_Object() {} + + void ref() const { + freferences++; + } + void unref() const { + if(freferences) { + if(--freferences==0) + delete this; + } + } +}; +DECLARE_OBJECT_PTR(PA_Object); + +// convinient types + +typedef smart_ptr CharPtr; +//const CharPtr CharPtrZero(0); #endif