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1-136 SOMobjects Base Toolkit: Programmer’s Reference Manual
C Example
Given class Key that has an attribute keyval of type long and an overridden method for
somPrintSelf that prints the value of the attribute (as well as the information printed by
SOMObject’s implementation of somPrintSelf), the following client code invokes methods
on Key objects using somDispatch and somClassDispatch. (The Key class was defined
with the callstyle=oidl class modifier, so the Environment argument is not required of its
methods.)
#include <key.h>
main()
{
SOMObject obj;
long k1 = 7, k2;
Key myKey = KeyNew();
va_list push, args = SOMMalloc(8);
somId setId = somIdFromString(”_set_keyval”);
somId getId = somIdFromString(”_get_keyval”);
somId prtId = somIdFromString(”_somPrintSelf”);
/* va_list invocation of setkey and getkey : */
push = args;
va_arg(push, SOMObject) = myKey;
va_arg(push, long) = k1;
SOMObject_somDispatch(myKey,(somToken*)0,setId,args);
push = args;
va_arg(push, SOMObject) = myKey;
SOMObject_somDispatch(myKey,(somToken*)&k2,getId,args);
printf(”va_list _set_keyval and _get_keyval: %i\n”, k2);
/* varargs invocation of setkey and getkey : */
_somDispatch(myKey, (somToken*)0, setId, myKey, k1);
_somDispatch(myKey, (somToken*)&k2, getId, myKey);
printf(”varargs _set_keyval and _get_keyval: %i\n”, k2);
/* illustrate somclassDispatch ”casting” (use varargs form) */
printf(”somPrintSelf on myKey as a Key:\n”);
_somClassDispatch(myKey,_Key,(somToken*)&obj2,prtId,myKey,0);
printf(”somPrintSelf on myKey as a SOMObject:\n”);
_somClassDispatch(myKey,_SOMObject,(somToken*)&obj,prtId,myKey,0)
;
SOMFree(args); SOMFree(setId); SOMFree(getId); SOMFree(prtId);
_somFree(myKey);
}
This program produces the following output:
va_list _set_keyval and _get_keyval: 7
varargs _set_keyval and _get_keyval: 7
somPrintSelf on myKey as a Key:
{An instance of class Key at address 2005B2F8}
–– with key value 7
somPrintSelf on myKey as a SOMObject:
{An instance of class Key at address 2005B2F8}
Original Class
SOMObject
Related Information
Functions: somApply
- Bull DPX/20 1
- About This Book 5
- Contents 7
- SOM Kernel Reference 1-1 13
- C++ Example 15
- SOM Kernel Reference 1-5 17
- SOM Kernel Reference 1-9 21
- ++ language bindings 22
- SOM Kernel Reference 1-13 25
- SOM Kernel Reference 1-15 27
- SOM Kernel Reference 1-17 29
- SOM Kernel Reference 1-19 31
- SOM Kernel Reference 1-25 37
- SOM Kernel Reference 1-27 39
- ++ usage bindings use this 42
- ++ usage 42
- SOM Kernel Reference 1-33 45
- SOM Kernel Reference 1-35 47
- SOM Kernel Reference 1-37 49
- SOMCalloc Function 51
- SOMClassInitFuncName Function 52
- SOMDeleteModule Function 53
- SOMError Function 54
- SOMFree Function 55
- SOMInitModule Function 56
- SOMLoadModule Function 58
- SOMMalloc Function 59
- SOMOutCharRoutine Function 60
- SOMRealloc Function 61
- SOM_Assert Macro 62
- SOM_ClassLibrary Macro 63
- SOM Kernel Reference 1-53 65
- SOM_Error Macro 66
- SOM_Expect Macro 67
- SOM_GetClass Macro 68
- SOM_InitEnvironment Macro 69
- SOM_MainProgram Macro 70
- SOM_NoTrace Macro 71
- SOM_ParentNumResolve Macro 72
- SOM_Resolve Macro 73
- SOM_ResolveNoCheck Macro 74
- SOM_SubstituteClass Macro 75
- SOM_Test Macro 76
- SOM_TestC Macro 77
- SOM_UninitEnvironment Macro 78
- SOM_WarnMsg Macro 79
- SOMClass Class 80
- Introduced Methods 81
- Deprecated Methods 82
- SOM Kernel Reference 1-71 83
- SOM Kernel Reference 1-75 87
- SOM Kernel Reference 1-79 91
- SOM Kernel Reference 1-83 95
- SOM Kernel Reference 1-85 97
- SOM Kernel Reference 1-87 99
- SOM Kernel Reference 1-89 101
- NULL is returned 101
- SOM Kernel Reference 1-91 103
- SOM Kernel Reference 1-93 105
- SOM Kernel Reference 1-95 107
- SOM Kernel Reference 1-97 109
- SOM Kernel Reference 1-99 111
- Related Information 112
- Original Class 112
- SOM Kernel Reference 1-101 113
- IDL Syntax 114
- Description 114
- Parameters 114
- Return Value 114
- SOMClassMgr Class 117
- New Methods 118
- Overridden Methods 118
- SOM Kernel Reference 1-107 119
- Return Values 120
- C Example 121
- SOM Kernel Reference 1-117 129
- SOM Kernel Reference 1-123 135
- SOMObject Class 138
- SOM Kernel Reference 1-139 151
- SOM Kernel Reference 1-143 155
- SOM Kernel Reference 1-145 157
- SOM Kernel Reference 1-153 165
- DSOM Framework Reference 169
- DSOM and CORBA 170
- ORBfree Function 172
- C Syntax 173
- SOMD_Init Function 176
- SOMD_NoORBfree Function 177
- SOMD_Uninit Function 180
- Context_delete Macro 181
- Request_delete Macro 182
- BOA Class 184
- Context Class 196
- ImplementationDef Class 204
- ImplRepository Class 206
- NVList Class 218
- ObjectMgr Class 229
- ORB Class 235
- Principal Class 241
- Request Class 242
- SOMDClientProxy Class 253
- Overridden methods 254
- SOMDObject Class 263
- SOMDObjectMgr Class 276
- SOMDServer Class 281
- SOMDServerMgr Class 289
- _ServerDisabled or 293
- SOMOA Class 297
- _NoMessages is returned as 304
- AttributeDef Class 308
- Overriding Methods 309
- ConstantDef Class 310
- Contained Class 312
- Container Class 318
- ExceptionDef Class 325
- InterfaceDef Class 327
- Attributes 328
- ModuleDef Class 331
- OperationDef Class 332
- ParameterDef Class 334
- Repository Class 336
- TypeDef Class 342
- TypeCode_alignment Function 343
- TypeCode_copy Function 344
- TypeCode_equal Function 345
- TypeCode_free Function 346
- TypeCode_kind Function 347
- TypeCodeNew Function 350
- TypeCode_param_count Function 352
- TypeCode_parameter Function 353
- TypeCode_print Function 355
- TypeCode_size Function 357
- SOMMBeforeAfter Metaclass 360
- SOMMSingleInstance Metaclass 365
- ++, or the somNew method 366
- SOMMTraced Metaclass 367
- SOMEClientEvent Class 370
- SOMEEMan Class 375
- SOMEEMRegisterData Class 391
- SOMEEvent Class 399
- SOMESinkEvent Class 404
- SOMETimerEvent Class 407
- SOMEWorkProcEvent Class 410
- NOM / NAME : Date : 419
- SOCIETE / COMPANY : 419
- ADRESSE / ADDRESS : 419
- 86 A2 28AQ 01 422
- ORDER REFERENCE 422
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