epics/pcas
0
0
Fork 0
Code Issues Pull Requests Projects Wiki Activity

Merged Michael Davidsaver's array-opt branch

Browse Source
This commit is contained in:
Andrew Johnson
2013-04-02 17:01:53 -05:00
parent 64a2e4e19b fb21c7c6e7
commit 2c8eb630cb
6 changed files with 38 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
documentation/RELEASE_NOTES.html
View File

@@ -15,6 +15,22 @@ EPICS Base 3.15.0.x releases are not intended for use in production systems.</p>
<h2 align="center">Changes between 3.15.0.1 and 3.15.0.2</h2>
<!-- Insert new items immediately below here ... -->
<h3>Array field double-buffering</h3>
<p>Array data can now be moved, without copying, into and out of the VAL field
of the waveform, aai, and aao record types by replacing the pointer in BPTR.
The basic rules which device support must follow are:</p>
<ol>
<li>BPTR, and the memory it is currently pointing to, can only be accessed
while the record is locked.</li>
<li>NELM may not be changed; NORD should be updated whenever the number of
valid data elements changes.</li>
<li>When BPTR is replaced it must always point to a block of memory large
enough to hold the maximum number of elements, as given by the NELM and
FTVL fields.</li>
</ol>
<h3>Spin-locks API added</h3>
<p>The new header file epicsSpin.h adds a portable spin-locks API which is