Annotation of parser3/src/include/pa_pool.h, revision 1.82
1.34 paf 1: /** @file
1.36 paf 2: Parser: pool class decl.
3:
1.77 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.36 paf 5:
1.78 paf 6: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 7: */
8:
9: #ifndef PA_POOL_H
10: #define PA_POOL_H
1.82 ! paf 11:
! 12: static const char* IDENT_POOL_H="$Id: zzz $";
1.1 paf 13:
1.52 parser 14: #include "pa_config_includes.h"
1.1 paf 15:
1.59 parser 16: #ifdef XML
1.75 paf 17: # include "gdome.h"
1.76 paf 18: // for xmlChar
19: # include "libxml/tree.h"
1.59 parser 20: #endif
1.55 parser 21:
22: // forwards
23:
1.21 paf 24: class Exception;
1.55 parser 25: class String;
1.73 paf 26: class Charset;
1.75 paf 27: class GdomeDOMString_auto_ptr;
1.55 parser 28:
1.35 paf 29: /**
1.34 paf 30: Pool mechanizm allows users not to free up allocated memory,
31: leaving that problem to 'pools'.
32:
1.38 paf 33: @see Pooled
1.34 paf 34: */
1.47 paf 35:
1.1 paf 36: class Pool {
37: public:
1.18 paf 38:
1.55 parser 39: Pool(void *astorage);
1.18 paf 40:
1.79 paf 41: //{@ statistics
1.70 paf 42: size_t total_allocated() { return ftotal_allocated; }
43: unsigned int total_times() { return ftotal_times; }
1.79 paf 44: //}@
1.70 paf 45:
1.40 paf 46: void set_context(void *acontext) { fcontext=acontext; }
1.64 parser 47: void *get_context() { return fcontext; }
1.39 paf 48:
1.34 paf 49: /// allocates some bytes on pool
1.68 paf 50: void *malloc(size_t size, int place=0) {
51: return check(real_malloc(size, place), size);
1.18 paf 52: }
1.34 paf 53: /// allocates some bytes clearing them with zeros
1.18 paf 54: void *calloc(size_t size) {
55: return check(real_calloc(size), size);
56: }
1.39 paf 57:
1.53 parser 58: /// registers a routine to clean up non-pooled allocations
1.54 parser 59: void register_cleanup(void (*cleanup) (void *), void *data) {
60: if(!real_register_cleanup(cleanup, data))
61: fail_register_cleanup();
62: }
1.53 parser 63:
1.79 paf 64: //{@ source charset
1.73 paf 65: void set_source_charset(Charset& acharset);
66: Charset& get_source_charset();
1.79 paf 67: //}@
1.73 paf 68:
1.79 paf 69: //{@ client charset
1.73 paf 70: void set_client_charset(Charset& charset);
71: Charset& get_client_charset();
1.79 paf 72: //}@
1.73 paf 73:
74: #ifdef XML
1.74 paf 75:
1.76 paf 76: /// @see Charset::transcode_cstr(xmlChar *s);
77: const char *transcode_cstr(xmlChar *s);
78: /// @see Charset::transcode(xmlChar *s);
79: String& transcode(xmlChar *s);
80: /// @see Charset::transcode_cstr(GdomeDOMString *s);
1.74 paf 81: const char *transcode_cstr(GdomeDOMString *s);
1.76 paf 82: /// @see Charset::transcode(GdomeDOMString *s);
1.74 paf 83: String& transcode(GdomeDOMString *s);
1.81 paf 84: /// @see Charset::transcode_cstr(const char *buf, size_t buf_size=0);
85: xmlChar *transcode_buf2xchar(const char *buf, size_t buf_size=0);
1.73 paf 86: /// @see Charset::transcode(const String& s)
1.75 paf 87: GdomeDOMString_auto_ptr transcode(const String& s);
1.74 paf 88:
1.73 paf 89: #endif
1.60 parser 90:
1.39 paf 91: private:
92:
93: void *fstorage;
1.40 paf 94: void *fcontext;
1.73 paf 95: Charset *source_charset;
96: Charset *client_charset;
1.8 paf 97:
1.50 parser 98: private:
99:
100: //{
101: /// @name implementation defined
1.68 paf 102: void *real_malloc(size_t size, int place);
1.20 paf 103: void *real_calloc(size_t size);
1.54 parser 104: bool real_register_cleanup(void (*cleanup) (void *), void *data);
1.50 parser 105: //}
1.17 paf 106:
1.23 paf 107: private:
1.17 paf 108:
1.34 paf 109: /// checks whether mem allocated OK. throws exception otherwise
1.23 paf 110: void *check(void *ptr, size_t size) {
1.70 paf 111: if(ptr) {
112: ftotal_allocated+=size;
113: ftotal_times++;
1.23 paf 114: return ptr;
1.70 paf 115: }
1.23 paf 116:
1.54 parser 117: fail_alloc(size);
1.23 paf 118:
119: // never reached
120: return 0;
121: }
1.54 parser 122: /// throws allocation exception
123: void fail_alloc(size_t size) const;
124:
125: /// throws register cleanup exception
126: void fail_register_cleanup() const;
1.70 paf 127:
128: private: // statistics
129:
130: size_t ftotal_allocated;
131: unsigned int ftotal_times;
1.59 parser 132:
1.8 paf 133: private: //disabled
134:
1.64 parser 135: Pool(const Pool&);
136: Pool& operator= (const Pool&);
1.21 paf 137: };
138:
1.35 paf 139: /**
1.34 paf 140: Base for all classes that are allocated in 'pools'.
141:
142: Holds Pool object. Contains useful wrappers to it's methods.
1.38 paf 143:
1.64 parser 144: @see NEW
1.34 paf 145: */
1.80 paf 146:
147: // all classes that are members parents of packed class [String]
148: // sould be packed also to avoid sparc odd st/lduh problem
149: #include "pa_pragma_pack_begin.h"
1.21 paf 150: class Pooled {
1.23 paf 151: // the pool i'm allocated on
1.49 paf 152: Pool *fpool;
1.21 paf 153: public:
1.37 paf 154:
155: /// the Pooled-sole: Pooled instances can be allocated in Pool rather then on heap
1.21 paf 156: static void *operator new(size_t size, Pool& apool) {
1.68 paf 157: return apool.malloc(size, 1);
1.21 paf 158: }
159:
1.49 paf 160: Pooled(Pool& apool) : fpool(&apool) {}
1.23 paf 161:
1.34 paf 162: /// my pool
1.49 paf 163: Pool& pool() const { return *fpool; }
164:
165: /** used for moving objects from one pool to another.
166: in between object can have no pool and can not be used
167: @see SQL_Driver_manager
168: */
169: void set_pool(Pool *apool) { fpool=apool; }
1.21 paf 170:
1.57 parser 171: //{
172: /// @name useful wrapper around pool
1.68 paf 173: void *malloc(size_t size, int place=0) const { return fpool->malloc(size, place); }
1.49 paf 174: void *calloc(size_t size) const { return fpool->calloc(size); }
1.57 parser 175: void register_cleanup(void (*cleanup) (void *), void *data) { fpool->register_cleanup(cleanup, data); }
1.59 parser 176: #ifdef XML
1.74 paf 177:
178: const char *transcode_cstr(GdomeDOMString *s) { return fpool->transcode_cstr(s); }
179: String& transcode(GdomeDOMString *s) { return fpool->transcode(s); }
180:
1.59 parser 181: #endif
1.57 parser 182: //}
1.23 paf 183: };
1.80 paf 184: #include "pa_pragma_pack_end.h"
1.34 paf 185: /// useful macro for creating objects on current Pooled object Pooled::pool()
1.23 paf 186: #define NEW new(pool())
1.1 paf 187:
188: #endif
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