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Dispatch table - Wikipedia, the free encyclopedia In computer science, a dispatch table is a list of pointers to the actual implementation of each method. Use of such a table is a common technique when implementing late binding in object-oriented programming. This table is called a virtual table or vtable. en.wikipedia.org /wiki/Dispatch_table   (254 words)

Virtual method table - Wikipedia, the free encyclopedia A virtual method table, virtual function table, dispatch table, or vtable, is a mechanism used in programming languages to support dynamic polymorphism, i.e., run-time method binding. The dispatch table is the same for all objects belonging to the same class, and is therefore typically shared between them. Vtables only allow for single dispatch on the special "this" parameter, in contrast to multiple dispatch (as in CLOS or Dylan), where the types of all parameters can be taken into account in dispatching. en.wikipedia.org /wiki/Virtual_table   (953 words)

[No title] In an EQL dispatch step, the hash table is associated with the generic function and the key is one of the arguments. An old mapping table can be used when a closure of a function internal to a method captures the mapping table, the class is redefined, and then the closure is called and accesses a slot. Marking the old instance information, dispatch table, and mapping tables obsolete ensures that the next operation on an obsolete instance of the class traps and updates the instance, changing the header to refer to a new slot vector and to the up to date instance information. www.apl.jhu.edu /~hall/text/Papers/CLOS-Optimizations.text   (2970 words)

pprint-dispatch Retrieves the highest priority function in table that is associated with a type specifier that matches object. The function is chosen by finding all of the type specifiers in table that match the object and selecting the highest priority function associated with any of these type specifiers. If table is nil, retrieval is done in the initial pprint dispatch table. www.bu.edu /cc/support/software/programming/lisp/allegro/ansicl/dictentr/pprint-d.htm   (152 words)

DRI Wiki - GLdispatch This dispatch stub fetches a pointer to the currently context's dispatch table, looks up a pointer to the desired function in that table, and, finally, calls the function. Once the location of the function pointer in the dispatch table is known, Mesa generates a dynamic dispatch stub for the function. The name of the dispatch table pointer is changed in the TLS case to prevent conflicts between a TLS libGL and a non-TLS DRI driver. dri.freedesktop.org /wiki/GLdispatch   (1049 words)

Message Dispatch on Pipelined Processors   (Site not responding. Last check: 2007-09-01) Message dispatch: given a target object and a message selector (method name), find the implementation of the method to call. Compacts selector table for each class by allowing columns to be reused for selectors that never occur in the same class. The tables could be compacted and then the compact representations could be joined into a single table. www.cs.purdue.edu /homes/bahmutov/cs510/mesdispatch.html   (400 words)

Object oriented dispatch and supercall process and arrangement (US5600838)   (Site not responding. Last check: 2007-09-01) Method and arrangement for dispatching messages between instance specific dispatch tables of objects, when a particular object does not have resident the method called for execution in response to a message directed toward it. The message is according dispatched to another instance specific dispatch table associated with an object which may be able to execute the method called for by the message initially transmitted. Upward chaining between instance, class, and superclass level dispatch tables, and method supercalls canceling the effect of method overriding by instance level methods are included in the method and arrangement. www.delphion.com /details?pn10=US05600838   (492 words)

7.1 Dispatch Tables for Simulation Construction   (Site not responding. Last check: 2007-09-01) The initial response made by the pursuer team for subsequent breakaways is given by Table 12.   Table 13 shows the total weight of programs to be sent by the pursuer team in response to a follow-up event for the first breakaway. Rather than provide a separate dispatch table for this one case, we will use the first row of Table 13. www.cs.pitt.edu /~daley/fin/fcl/fcl_node42.html   (351 words)

The Solaris process model, Part 4: More on the kernel dispatcher - SunWorld - December 1998 Jim began his coverage of the kernel dispatcher in October, with an overview of the dispatcher and the timeshare dispatch table. Each entry in the table conforms to an entry in the RT dispatch table, as defined by a rtdpent_t structure. There are two primary user-level commands that apply to the dispatcher: the dispadmin(1M) command for dispatch table administration and priocntl(1) for priority and scheduling class control for processes. sunsite.uakom.sk /sunworldonline/swol-12-1998/swol-12-insidesolaris.html   (2351 words)

Dispatch Tables   (Site not responding. Last check: 2007-09-01) This macro should be provided on machines where the addresses in a dispatch table are relative to the table's own address. This macro should be provided on machines where the addresses in a dispatch table are absolute. The definition should be a C statement to be executed after the assembler code for the table is written. www.cse.unsw.edu.au /help/doc/info/gcc/Dispatch_Tables.html   (235 words)

27.6. Pretty Printing Dispatch Tables   (Site not responding. Last check: 2007-09-01) A pprint dispatch table is a mapping from keys to pairs of values. A copy is made of table, which defaults to the current pprint dispatch table. This retrieves the highest priority function from a pprint table that is associated with a type specifier in the table that matches object. www.ceng.metu.edu.tr /docs/clm/node259.html   (984 words)

Dispatch -- Recommendations and Resources A dispatcher works at a central station, sends out personnel in response to inquiries from the public, usually through a telephone or radio, and coordinates communications, relaying messages as needed. Multiple dispatch or multimethods is the feature of some object-oriented programming languages in which a function or method can be specialized on the type of more than one of its arguments. single dispatch, object-oriented programming languages, when you invoke a method ("send a message" in Smalltalk, "call a member function" in C++) one of its arguments is treated specially and used to determine which of the(potentially many) methods of that name is to be applied. www.becomingapediatrician.com /health/43/dispatch.html   (1104 words)

Dr. Dobb's | Extending the PalmOS | July 22, 2001 This entry holds both the library's dispatch table and the memory allocated by the library for its global memory. The first section of the dispatch table is an array of offsets from the beginning of the dispatch table. Using the trap identifier as an index into the first section of the dispatch table, it retrieves the offset to the jump instruction corresponding to the trap. www.ddj.com /article/printableArticle.jhtml?articleID=184411100&dept_url=   (2999 words)

set-pprint-dispatch Two values are associated with each type specifier in a pprint dispatch table: a function and a priority. Since pprint dispatch tables are often used to control the pretty printing of Lisp code, it is common for the type-specifier to be an expression of the form This signifies that the corresponding object must be a cons cell whose car matches the type specifier car-type and whose cdr matches the type specifier cdr-type. www.bu.edu /cc/support/software/programming/lisp/allegro/ansicl/dictentr/set-ppri.htm   (252 words)

CLHS: Section 22.2.1.4 When *print-pretty* is true, the current pprint dispatch table (in *print-pprint-dispatch*) controls how objects are printed. The function is chosen from the current pprint dispatch table by finding the highest priority function that is associated with a type specifier that matches the object; if there is more than one such function, it is implementation-dependent which is used. However, if there is no information in the table about how to pretty print a particular kind of object, a function is invoked which uses print-object to print the object. www.eg.bucknell.edu /~cs379/clhs/Body/22_bad.htm   (223 words)

CROS Dispatching Pointer to the dispatch table of the reference, which should never be null or dispatching will fail. The dispatch table maps an implementation class to a reference class, with an entry for each dispatched method. Fixed casts are precomputed by the reference, appearing as entries with no method since all that is required is the replacement dispatch table, which can be stored as the class context of the cast. www.xmission.com /~ray/CROS.Dispatching.html   (487 words)

[No title]   (Site not responding. Last check: 2007-09-01) In interpreting these tables the implementer should always bear in mind that additional functions may be added to future MAC's and that the support of functions that the protocol does not need should not prevent the protocol from accepting a bind for the MAC. 4.1.5 Protocol lower dispatch table The protocol lower dispatch table is specified in the characteristics table for the protocol binding to the MAC. The characteristics table for the MAC actually does not supply a lower dispatch table (the pointer to it is NULL). www.enterasys.com /pub/unsupported/NETSPECS/ndis-mac.v101.txt   (12982 words)

POE: Poe rfcs/multiple event dispatch Rather than big if/then trees before and after the event is dispatched, break it into discrete functions by event type. Create a dispatch table to call the proper pre- and post-dispatch code. Instances where the caller knows what kind of event is being dispatched (where _dispatch_state is called directly: call, and select dispatches), the caller can call the proper pre- and post-dispatch code itself. poe.perl.org /?Poe_rfcs/multiple_event_dispatch   (157 words)

3.7.7.1 Dispatch Tables for Simulation Construction   (Site not responding. Last check: 2007-09-01) Any target breakaway event whose initiating programs fail to meet the minimal weights of either of the previous two tables will be treated by the pursuer team as a null event. The following table shows the total weight of programs to be sent by the pursuer team in response to a follow-up event for the first breakaway. Rather than provide a separate dispatch table for this one case, we will use the first row of the previous table. www.cs.pitt.edu /~daley/cs3120/cs3120w_node93.html   (317 words)

CLSV: Function set-pprint-dispatch   (Site not responding. Last check: 2007-09-01) Installs an entry into the pprint dispatch table which is \param{table}. Two values are associated with each type specifier in a pprint dispatch table: a \param{function} and a \param{priority}. Since pprint dispatch tables are often used to control the pretty printing of Lisp code, it is common for the \param{type-specifier} to be an expression of the form www.dridus.com /~nyef/clsv/f_set-pprint-dispatch.html   (242 words)

RedHanded » Minimizing Row Displacement Dispatch Tables For implementing Dynamic Dispatch, the technique that uses the dispatch table like Virtual Table(VTABLE) of C++ is often used in statically-typed language. When compressing the table, though it is usually splitted by class, this report recommends to split by selector. When a class is added, it deals by using two or more dispatch tables (fall-back the 2nd table by method_missing). redhanded.hobix.com /inspect/minimizingRowDisplacementDispatchTables.html   (405 words)

Multi-Dispatch in the Java Virtual Machine: Design and Implementation   (Site not responding. Last check: 2007-09-01) Another common use for double dispatch is in drag-and-drop applications, where the result of a user action depends on both the data object dragged and on the target object. If a dispatcher has not been instantiated, and the just-loaded class is uni-dispatch only, we defer the registration in order to reduce the overhead to uni-dispatch programs. In a series of micro-benchmarks, we showed that our prototype implementation adds no performance overhead to dispatch if only uni-dispatch is used (Table 2) and the overhead of multi-dispatch can be competitive with explicit double dispatch (Table 4). www.cs.ualberta.ca /~paullu/Papers/COOTS2001-HTML/mdj.html   (8431 words)

FBB--File Libraries   (Site not responding. Last check: 2007-09-01) The weekly US Dept. of State Dispatch provides a diverse compilation of major speeches, congressional testimony, policy statements, fact sheets, and other foreign policy information from the State Dept. Dispatch Supplements, about 5 or 6 per year, are on single issues such as the Vienna Documents, Economic Summit, etc. Editor can be reached at 202-647-6317. U 03/03/96 181772 bytes (17 hits) Dispatch Supplement Vol. dispatch index V4N01.TXT 01/31/94 50304 bytes (3 hits) Dispatch Vol 4, No. 1, Jan. 4, 1993 See V4N01.DOC for a Table of Contents to the US Department of State Dispatch Volume 4, Number 1, January 4, 1993. fedbbs.access.gpo.gov /libs/DOS_DISP.htm   (2720 words)

Dispatch generates an optimized dispatch table representation of a list of rules. generates a dispatch table which uses hash codes to specify which sets of rules need actually be scanned for a particular input expression. are automatically optimized with dispatch tables when appropriate. documents.wolfram.com /v4/RefGuide/Dispatch.html   (101 words)

[No title] Doing a type test (cast or // instanceof) is the same problem: Once we have a possible Partial // Interface Dispatch Table, we just compare the first element to see if // it matches the desired interface. Our solution is to keep a vector of // candiate offsets in each interface (the ioffsets table), and // in each class we have an index (the iindex) used to select the // correct offset from ioffsets. That imples that all the ioffsets table have to have the same length: That of the largest CLASS_IINDEX. per.bothner.com /jv-inherit.txt   (1443 words)

Military History of the Scottish Regiments Dispatch is issued free three times a year to all our fully paid up members in the United Kingdom, Europe, the United States of America, Canada, South Africa, Australia and New Zealand. This is to act as a guide to the information you could receive, if you decide to join the society, and then obtain the latest issues of the journal. Dispatch, the hard copy printed journal of the Society is issued to all fully paid up members. www.btinternet.com /~james.mckay/journal.htm   (1131 words)

Context-Switch: Home Page Once a process reaches the priority level of 59, it will stay at that level so long as a) the process is still ready to execute and b) it is not pre-empted for the CPU processing slot. Observe the way that all three clocks have moving hour and minute hands sweeping around the clock face and that all three clocks' hands are moving at roughly the same rate. This will cause the dispatch details to alter and be more batch oriented. www.context-switch.com /performance/dispatch.htm   (1038 words)

Double Dispatch Example I guess the simplest solution is to assign each class a sequential ordering within the hierarchy, and then add each Runnable to the dispatch table manually. One level of dispatch is always "easy", in that it can be extended without changing existing code. The second is always "harder", in that the new elements have to added to the existing first-level dispatch code. c2.com /cgi/wiki?DoubleDispatchExample   (3171 words)

OSR's ntdev List: Modify drivers dispatch table Hi, would it be legal (and possible) to modify the dispatch table of a running driver? It would be much simpler to have a static local LONG in your dispatch routine that is Interlock test and set and if zero when tested you call function x else you call function y. There are reasons why you might want to modify the dispatch table of a driver 'on the fly' but this is not one of them. www.osronline.com /showThread.cfm?link=7196   (566 words)

middleworld.com - Solaris performance management So, the lower the priority, the less likely that process will be allocated to a CPU for processing if there is contention for CPU resource. To see how these two dispatch tables could affect a process, you may wish to try the following experiment. NOTE: When this experiment was carried out on a SunBlade 100s running Solaris 8 and Solaris 9, the clock hands of all three clocks continued to sweep the clock faces. www.middleworld.com /docs/dispatch.htm   (1043 words)

[No title]   (Site not responding. Last check: 2007-09-01) Place the prototype // for the function in globals.h and the definition of the // function in the appropriate module. // Command dispatch table - // For every command to be handled by the main window procedure // place the comand number and handler function pointer in // rgcmd (the command dispatch table). If the message // is implemented in the message dispatch table, the return value is // the value returned by the message handling function. www.cs.columbia.edu /~laza/Stewart/cpp/Include/OMSNT/SAMPLES/MAINCMDS.OMS   (705 words)

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