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| version 1.167, 2007/05/23 08:30:20 | version 1.172, 2007/08/20 10:37:21 |
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| Line 243 static void _while(Request& r, MethodPar | Line 243 static void _while(Request& r, MethodPar |
| Temp_hash_value<const String::Body, void*> | Temp_hash_value<const String::Body, void*> |
| cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r); | cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r); |
| Value& vcondition=params.as_junction(0, "condition must be expression"); | Value& vcondition=params.as_expression(0, "condition must be number, bool or expression"); |
| Value& body_code=params.as_junction(1, "body must be code"); | Value& body_code=params.as_junction(1, "body must be code"); |
| Value* delim_maybe_code=params.count()>2?¶ms[2]:0; | Value* delim_maybe_code=params.count()>2?¶ms[2]:0; |
| Line 277 static void _while(Request& r, MethodPar | Line 278 static void _while(Request& r, MethodPar |
| } | } |
| static void _use(Request& r, MethodParams& params) { | static void _use(Request& r, MethodParams& params) { |
| Value& vfile=params.as_no_junction(0, "file name must not be code"); | Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE); |
| r.use_file(r.main_class, vfile.as_string()); | r.use_file(r.main_class, vfile.as_string()); |
| } | } |
| Line 610 const String* locked_process_and_cache_p | Line 611 const String* locked_process_and_cache_p |
| const String* result=file_write_action_under_lock( | const String* result=file_write_action_under_lock( |
| file_spec, | file_spec, |
| "cache_put", locked_process_and_cache_put_action, &info, | "cache_put", |
| locked_process_and_cache_put_action, | |
| &info, | |
| false/*as_text*/, | false/*as_text*/, |
| false/*do_append*/, | false/*do_append*/, |
| false/*block*/, | false/*block == don't wait till other thread release lock*/) ? info.processed_code: 0; |
| false/*fail on lock problem*/) ? info.processed_code: 0; | |
| time_t now=time(0); | time_t now=time(0); |
| if(scope.expires<=now) | if(scope.expires<=now) |
| cache_delete(file_spec); | cache_delete(file_spec); |
| Line 705 static void _cache(Request& r, MethodPar | Line 708 static void _cache(Request& r, MethodPar |
| "invalid number of parameters"); | "invalid number of parameters"); |
| // file_spec, expires, body code | // file_spec, expires, body code |
| const String& file_spec=r.absolute(params.as_string(0, "filespec must be string")); | const String& file_spec=as_file_spec(r, params, 0); |
| Cache_scope scope={as_expires(r, params, 1, now), 0}; | Cache_scope scope={as_expires(r, params, 1, now), 0}; |
| Line 716 static void _cache(Request& r, MethodPar | Line 719 static void _cache(Request& r, MethodPar |
| if(params.count()>3) | if(params.count()>3) |
| catch_code=¶ms.as_junction(3, "catch_code must be code"); | catch_code=¶ms.as_junction(3, "catch_code must be code"); |
| if(scope.expires>now) { // valid 'expires' specified? try cached copy... | if(scope.expires>now) { |
| // hence we don't hope to have unary create/lockEX | Cache_get_result cached=cache_get(r.charsets, file_spec, now); |
| // we need some plan to live in a life like that, so... | |
| // worst races plan: | |
| // A B | |
| // open | |
| // |open | |
| // lockSH | |
| // |nonblocking-lockEX fails | |
| // unlockSH | |
| // close, cache_get returns 0 | |
| // open | |
| // nonblocking-lockEX succeeds; process, write, close | |
| // |retry1: open | |
| // ... | |
| // |lockSH succeeds; ... | |
| for(int retry=0; retry<2; retry++) { | |
| Cache_get_result cached=cache_get(r.charsets, file_spec, now); | |
| if(cached.body) { // have cached copy | |
| if(cached.expired) | |
| scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[] | |
| else // and it's not expired yet | |
| { | |
| // write it out | |
| r.write_assign_lang(*cached.body); | |
| // happy with it | |
| return; | |
| } | |
| } | |
| // non-blocked lock; process; cache it | if(cached.body) { // have cached copy |
| if(const String* processed_body= | if(cached.expired) { |
| locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec)) { | scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[] |
| // write it out | } else { |
| r.write_assign_lang(*processed_body); | // and it's not expired yet write it out |
| // happy with it | r.write_assign_lang(*cached.body); |
| return; | // happy with it |
| } else { // somebody writing result right now | return; |
| pa_sleep(0, 500000); // waiting half a second | } |
| retry=0; // prolonging our wait, than could cache_get it, without processing body_code | |
| } | |
| } | } |
| throw Exception(0, | |
| &file_spec, | // no cached info or it's already expired |
| "locking problem"); | try { |
| // try to process and store in file | |
| const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec); | |
| // write it out | |
| r.write_assign_lang(*processed_body); | |
| // happy with it | |
| return; | |
| } catch(...) { | |
| // we fail during get exclusive lock | |
| // nvm we just process it a bit later | |
| } | |
| } else { | } else { |
| // instructed not to cache; forget cached copy | // instructed not to cache; forget cached copy |
| cache_delete(file_spec); | cache_delete(file_spec); |
| // process | |
| const String& processed_body=r.process_to_string(body_code); | |
| // write it out | |
| r.write_assign_lang(processed_body); | |
| // happy with it | |
| return; | |
| } | } |
| // never reached | |
| // process without cacheing | |
| const String& processed_body=r.process_to_string(body_code); | |
| // write it out | |
| r.write_assign_lang(processed_body); | |
| } | } |
| static StringOrValue process_try_body_code(Request& r, Value* body_code) { | static StringOrValue process_try_body_code(Request& r, Value* body_code) { |