--- parser3/src/include/pa_pool.h 2001/03/26 08:27:25 1.45 +++ parser3/src/include/pa_pool.h 2003/01/22 15:39:07 1.86.2.1 @@ -1,198 +1,286 @@ /** @file - Parser: pool class decl. + Parser: Parser: reference counting classes decls. - Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) + Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) - - $Id: pa_pool.h,v 1.45 2001/03/26 08:27:25 paf Exp $ + Author: Alexandr Petrosian (http://paf.design.ru) */ #ifndef PA_POOL_H #define PA_POOL_H -#include +static const char* IDENT_POOL_H="$Date: 2003/01/22 15:39:07 $"; + +#include "pa_config_includes.h" + +#ifdef XML +# include "gdome.h" +// for xmlChar +# include "libxml/tree.h" +#endif + +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); + +// forwards 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'. - Also holds Exception object, which can be temporary set using - Temp_exception auto-object. - @see Pooled -*/ +* / class Pool { - friend Temp_exception; public: - Pool(void *astorage) : fstorage(astorage), fcontext(0), ftag(0), fexception(0) {} - - void set_context(void *acontext) { fcontext=acontext; } - void *context() { return fcontext; } + Pool(void *astorage); - void set_tag(void *atag) { ftag=atag; } - void *tag() { return ftag; } + //{@ statistics + size_t total_allocated() { return ftotal_allocated; } + unsigned int total_times() { return ftotal_times; } + //}@ - /// current exception object of the pool - Exception& exception() const { return *fexception; } + void set_context(void *acontext) { fcontext=acontext; } + void *get_context() { return fcontext; } /// allocates some bytes on pool - void *malloc(size_t size) { - return check(real_malloc(size), size); + 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); } + /// 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; - void *ftag; - -private: // implementation defined + 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 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; + /// throws allocation exception + void fail_alloc(size_t size) const; -private: // exception handling - - // exception replacement mechanism is 'private'zed from direct usage - // Temp_exception object enforces paired set/restore - Exception *set_exception(Exception *e){ - Exception *r=fexception; - fexception=e; - return r; - } - void restore_exception(Exception *e) { - fexception=e; - } - -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, Temp_exception -*/ + @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) {} /// my pool - Pool& pool() const { return fpool; } + Pool& pool() const { return *fpool; } + + /** 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 + ); + } - /// useful wrapper around pool - void *malloc(size_t size) const { return fpool.malloc(size); } - /// useful wrapper around pool - void *calloc(size_t size) const { return fpool.calloc(size); } - /// useful wrapper around pool - Exception& exception() const { return fpool.exception(); } +#endif + //} }; +#include "pa_pragma_pack_end.h" /// useful macro for creating objects on current Pooled object Pooled::pool() #define NEW new(pool()) +*/ /** - Auto-object used for temporary changing Pool's exception(). - - Use by with these macros: - @code - TRY { - // ... - if(?) - THROW(?); - // ... - } CATCH(e) { - // code, using e fields - // e.comment() + Base for all Parser classes, memory allocation/dallocation goes via pa_malloc/pa_free. +*/ +class PA_Object { + mutable unsigned long references_count; +public: + PA_Object(): references_count(0) {} + void add_ref() { + references_count++; + } + void release() { + if(references_count) { + if(--references_count==0) + delete this; } - END_CATCH - @endcode + } - @see TRY, THROW -*/ -class Temp_exception { - Pool& fpool; - Exception *saved_exception; public: - Temp_exception(Pool& apool, Exception& exception) : - fpool(apool), - saved_exception(apool.set_exception(&exception)) { + /// the PA_Object -sole: instances allocated using our functions + static void *operator new(size_t size) { + return pa_malloc(size); } - ~Temp_exception() { - fpool.restore_exception(saved_exception); + static void operator delete(void *ptr) { + pa_free(ptr); } }; -#define XTRY(pool) \ - { \ - Exception temp_exception; \ - Temp_exception le(pool, temp_exception); \ - if(setjmp(temp_exception.mark)==0) - -#define XTHROW(exception) exception._throw -#define XCATCH(e) \ - else{ \ - Exception& e=temp_exception; - -#define XEND_CATCH \ - } \ - } - -//@{ -/// @see Temp_exception -#define TRY XTRY(pool()) -#define THROW XTHROW(exception()) -#define CATCH(e) XCATCH(e) -#define END_CATCH XEND_CATCH - -#define PTRY XTRY(pool) -#define PTHROW XTHROW(pool.exception()) -#define PCATCH(e) XCATCH(e) -#define PEND_CATCH XEND_CATCH - -#define RTHROW XTHROW(r.pool().exception()) -//@} +template class auto_ptr { + T *ptr; +public: + typedef T element_type; + explicit auto_ptr(T *ptr = 0) { + this->ptr=ptr; + if(ptr) + ptr->add_ref(); + } + auto_ptr(const auto_ptr& src) { + ptr=src.get(); + ptr->add_ref(); + } + auto_ptr& operator=(auto_ptr& src) { + if(this!=&src) + if(ptr!=src.get()) { + if(ptr) + ptr->release(); + ptr=src.get(); + if(ptr) + ptr->add_ref(); + } + } + ~auto_ptr() { + if(ptr) + ptr->release(); + } + T& operator*() const { + return *get(); + } + T *operator->() const { + return get(); + } + T *get() const { + return ptr; + } +}; #endif