| Title | MPS: obsolete mpsdy.dll and mpslibcb mechanism is still present in builds and source |
| Status | closed |
| Priority | essential |
| Assigned user | Richard Kistruck |
| Organization | Ravenbrook |
| Description | MPS: obsolete mpsdy.dll and mpslibcb mechanism is still present in builds and source Related jobs: job002148: "mps_lib_callback_register breaks .def file for re-exporting MPS functions" The mpsdy.dll and mpslibcb mechanism is obsolete and should be removed. It is an unnecessary source of complexity and confusion. RHSK 2009-09-25 The two current ways of making MPS functions available for DLLs to dynamically bind to are: 1. client host code, at least providing the mps_lib_* plinth functions, statically links MPS functions, and re-exports them (eg. specifying "/def:w3gen.def" to Windows linker); 2. use mpsdy.dll, which contains only MPS code, and uses mpslibcb's mps_lib_callback_register to receive plinth callbacks. Method 1 is recommended. Method 2 is not recommended, is untested, and is expected to have performance issues (slow cross-DLL calls to library functions such as memcpy). Method 2 should be retired, and the dll and mpslibcb mechanism that support it should be removed. |
| How found | unknown |
| Observed in | 1.108.2 |
| Introduced in | 1.108.2 |
| Created by | Richard Kistruck |
| Created on | 2009-09-25 15:44:52 |
| Last modified by | Richard Brooksby |
| Last modified on | 2012-09-21 20:46:54 |
| History | 2009-09-25 RHSK Created as followup to job002148. |
| Change | Effect | Date | User | Description |
|---|---|---|---|---|
| 179279 | closed | 2012-09-05 18:44:44 | Richard Brooksby | Merging branch/2012-08-15/variety-reform. |