Global data synchronization mode - Global data synchronization mode - MATLAB (original) (raw)
Main Content
Global data synchronization mode
Description
Settings
| Value | Description for Global Data | Description for Constant Global Data |
|---|---|---|
| 'SyncAlways' (default) | This value is the default value.Synchronizes global data at MEX function entry and exit and for extrinsic calls for maximum consistency between MATLAB® and the generated MEX function. To maximize performance, if the extrinsic calls do not change global data, use this option with thecoder.extrinsic -sync:off option to turn off synchronization for these calls. | Verifies consistency of constant global data at MEX function entry and after extrinsic calls. If the global data values in the MATLAB global workspace are inconsistent with the compile-time constant global values in the MEX function, the MEX function ends with an error. Use thecoder.extrinsic -sync:off option to turn off consistency checks after specific extrinsic calls. |
| 'SyncAtEntryAndExits' | Synchronizes global data at MEX function entry and exit only. To maximize performance, if only a few extrinsic calls change global data, use this option with thecoder.extrinsic -sync:on option to turn on synchronization for these calls. | Verifies constant global data at MEX function entry only. If the global data values in the MATLAB global workspace are inconsistent with the compile-time constant global values in the MEX function, the MEX function ends with an error. Use thecoder.extrinsic -sync:on option to turn on consistency checks after specific extrinsic calls. |
| 'NoSync' | Disables synchronization. Before disabling synchronization, verify that your MEX function does not interact with MATLAB global data. Otherwise, inconsistencies between MATLAB and the MEX function can occur. | Disables consistency checks. |
At MEX-function entry, exit and extrinsic calls
Disabled
At MEX-function entry and exit
Programmatic Use
| **Property:**GlobalDataSyncMethod | |
|---|---|
| Values: 'SyncAlways' |'SyncAtEntryAndExits' | 'NoSync' |
| Default:'SyncAlways' |
Version History
Introduced in R2011a