--- parser3/src/include/pa_pool.h 2001/03/19 16:44:00 1.35 +++ parser3/src/include/pa_pool.h 2001/11/16 11:51:32 1.71 @@ -1,178 +1,180 @@ /** @file - Parser + Parser: pool class decl. + Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) - $Id: pa_pool.h,v 1.35 2001/03/19 16:44:00 paf Exp $ + Author: Alexander Petrosyan (http://paf.design.ru) + + $Id: pa_pool.h,v 1.71 2001/11/16 11:51:32 paf Exp $ */ #ifndef PA_POOL_H #define PA_POOL_H -#include +#include "pa_config_includes.h" + +#ifdef XML +#include +#include +#include +#endif + +// forwards class Exception; -class Temp_exception; +class String; /** 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() : fexception(0) {} - ~Pool() {} + Pool(void *astorage); + ~Pool(); + + ///{@ 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); } -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(); + } + + /// resets transcoder if they change charset + void set_charset(const String &charset); + /// returns current charset + const String& get_charset() { return *charset; } + +private: + + void *fstorage; + void *fcontext; + const String *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 + /// throws register cleanup exception + void fail_register_cleanup() const; - // exception replacement mechanism is 'protected' 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; - } +#ifdef XML + +public: + /// converts Xalan string to char * + const char *transcode_cstr(const XalanDOMString& s); + /// converts Xalan string to parser String + String& transcode(const XalanDOMString& s); + /// converts char * to Xalan string + std::auto_ptr transcode_buf(const char *buf, size_t buf_size); + /// converts parser String to Xalan string + std::auto_ptr transcode(const String& s); private: - // current request's exception object - Exception *fexception; + void set_charset(const char *new_scharset); + void update_transcoder(); + +private: + + XMLTranscoder *transcoder; + +#endif + +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 */ 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; } - /// 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(); } + /** 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); } +#ifdef XML + const char *transcode_cstr(const XalanDOMString& s) { return fpool->transcode_cstr(s); } + String& transcode(const XalanDOMString& s) { return fpool->transcode(s); } +#endif + //} }; /// 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() - } - END_CATCH - \endcode -*/ -class Temp_exception { - Pool& fpool; - Exception *saved_exception; -public: - Temp_exception(Pool& apool, Exception& exception) : - fpool(apool), - saved_exception(apool.set_exception(&exception)) { - } - ~Temp_exception() { - fpool.restore_exception(saved_exception); - } -}; - -#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()) -//@} - #endif