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This commit is contained in:
Jeff Hill
1996-11-07 14:42:36 +00:00
parent cfc470d480
commit 3f7bfda8d8
1 changed files with 23 additions and 9 deletions
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32
src/cas/RELEASE_NOTES
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@@ -7,6 +7,8 @@ o The canonical PV name is returned from caServer::pvExistTest()
in the supplied buffer and not in a gdd data descriptor. See
"casdef.h".
old API:
//
// pvExistTest()
//
// The server tool is encouraged to accept multiple PV name
// aliases for the same PV here. However, a unique canonical name
@@ -25,25 +27,37 @@ old API:
virtual caStatus pvExistTest (const casCtx &ctx, const char *pPVName,
gdd &canonicalPVName) = 0;
new API:
//
// pvExistTest()
//
// The server tool is encouraged to accept multiple PV name
// aliases for the same PV here. However, one unique canonical name
// must be selected by the srever tool and returned to the
// server lib for each PV. The server will use this canonical
// name to prevent internal duplication of data structures for
// must be selected by the srever tool and returned to the
// server lib for each PV. The server will use this canonical
// name to prevent internal duplication of data structures for
// process variables that have multiple aliases.
//
// o returns S_casApp_success and fills in the canonical name
// buffer if the PV is in this server tool
// o returns S_casApp_success and a valid canonical name string
// when the PV is in this server tool
//
// o returns S_casApp_pvNotFound if the PV does not exist in
// the server tool
//
virtual caStatus pvExistTest (const casCtx &ctx,
const char *pPVName, char *pCanonicalNameBuf,
const unsigned canonicalNameBufSize);
// Examples:
// caServerXXX::pvExistTest(const casCtx &ctx, const char *pPVName)
// {
// return pvExistReturn(S_casApp_success, pPVName); // common
// return pvExistReturn(S_casApp_pvNotFound); // no PV by that name
//
// char pName[9] = "myPVName";
// return pvExistReturn(S_casApp_success, pName); // also common
// return pvExistReturn(S_casApp_asyncCompletion); // not now
// }
//
virtual pvExistReturn pvExistTest (const casCtx &ctx,
const char *pPVName)=0;
o The server tool must use one of class casAsyncReadIO, casAsyncWriteIO, or
o The server tool must now use one of class casAsyncReadIO, casAsyncWriteIO, or
casAsyncPVExistIO in place of casAsyncIO. See "casdef.h".