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| == EPICS: IOC database access == | | == EPICS: IOC database access == |
| May 25 2005 | | May 26 2005 |
| <center> | | <center> |
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| implement and how it uses dbdClass definitions to implement the | | implement and how it uses dbdClass definitions to implement the |
| actions. | | actions. |
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| Not yet defined is how the following are created:
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| * DbdStructList - The list of the description of each structure type.
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| * DbdRecordList - The list of the description of each record type.
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| * DbdLinkList - The list of the description of each DBD link definition
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| * DbdDeviceList - The list of the description of each DBD device definition.
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| The following assumes that these lists have been created.
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| ----
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| <center>
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| == dbLoadRecords ==
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| </center>
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| To create and initialize a new record instance the following is done:
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| allocate a DbdRecordInstance
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| Search DbdRecordList to find DbdRecord (record type description)
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| Call DbdRecord.plifetime->allocate
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| for each DbdStructField in DbdRecord.pfield
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| switch DbdStructField.type
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| case: epicsBooleanT, ..., epicsFloat64T
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| initialize the field if DbdStructFieldAttribute.default is defined.
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| break;
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| case: epicsStructT
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| initialize EpicsStruct.pstructDef
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| Call EpicsStructDef.plifetime->allocate
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| break;
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| case: epicsStructT
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| initialize EpicsStruct.pstructDef
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| Call EpicsStructDef.plifetime->allocate
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| break;
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| default:
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| do nothing. Let record support handle it
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