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* Started using Berkeley DB environments. This is necessary for

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transaction support (but we don't actually use transactions yet).
This commit is contained in:
Eelco Dolstra 2003-07-31 13:47:13 +00:00
parent 758bd4673a
commit 4a013962bd
12 changed files with 256 additions and 107 deletions
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57
src/store.cc
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@ -96,7 +96,7 @@ void registerSubstitute(const FSId & srcId, const FSId & subId)
/* For now, accept only one substitute per id. */
Strings subs;
subs.push_back(subId);
setListDB(nixDB, dbSubstitutes, srcId, subs);
nixDB.setStrings(noTxn, dbSubstitutes, srcId, subs);
}
@ -104,10 +104,10 @@ void registerPath(const string & _path, const FSId & id)
{
string path(canonPath(_path));
setDB(nixDB, dbPath2Id, path, id);
nixDB.setString(noTxn, dbPath2Id, path, id);
Strings paths;
queryListDB(nixDB, dbId2Paths, id, paths); /* non-existence = ok */
nixDB.queryStrings(noTxn, dbId2Paths, id, paths); /* non-existence = ok */
for (Strings::iterator it = paths.begin();
it != paths.end(); it++)
@ -115,7 +115,7 @@ void registerPath(const string & _path, const FSId & id)
paths.push_back(path);
setListDB(nixDB, dbId2Paths, id, paths);
nixDB.setStrings(noTxn, dbId2Paths, id, paths);
}
@ -124,16 +124,15 @@ void unregisterPath(const string & _path)
string path(canonPath(_path));
string _id;
if (!queryDB(nixDB, dbPath2Id, path, _id))
return;
if (!nixDB.queryString(noTxn, dbPath2Id, path, _id)) return;
FSId id(parseHash(_id));
delDB(nixDB, dbPath2Id, path);
nixDB.delPair(noTxn, dbPath2Id, path);
/* begin transaction */
Strings paths, paths2;
queryListDB(nixDB, dbId2Paths, id, paths); /* non-existence = ok */
nixDB.queryStrings(noTxn, dbId2Paths, id, paths); /* non-existence = ok */
bool changed = false;
for (Strings::iterator it = paths.begin();
@ -141,7 +140,7 @@ void unregisterPath(const string & _path)
if (*it != path) paths2.push_back(*it); else changed = true;
if (changed)
setListDB(nixDB, dbId2Paths, id, paths2);
nixDB.setStrings(noTxn, dbId2Paths, id, paths2);
/* end transaction */
@ -151,7 +150,7 @@ void unregisterPath(const string & _path)
bool queryPathId(const string & path, FSId & id)
{
string s;
if (!queryDB(nixDB, dbPath2Id, absPath(path), s)) return false;
if (!nixDB.queryString(noTxn, dbPath2Id, absPath(path), s)) return false;
id = parseHash(s);
return true;
}
@ -174,7 +173,7 @@ string expandId(const FSId & id, const string & target,
if (!target.empty() && !isInPrefix(target, prefix))
abort();
queryListDB(nixDB, dbId2Paths, id, paths);
nixDB.queryStrings(noTxn, dbId2Paths, id, paths);
/* Pick one equal to `target'. */
if (!target.empty()) {
@ -212,7 +211,7 @@ string expandId(const FSId & id, const string & target,
/* Try to realise the substitutes, but only if this id is not
already being realised by a substitute. */
Strings subs;
queryListDB(nixDB, dbSubstitutes, id, subs); /* non-existence = ok */
nixDB.queryStrings(noTxn, dbSubstitutes, id, subs); /* non-existence = ok */
for (Strings::iterator it = subs.begin(); it != subs.end(); it++) {
FSId subId = parseHash(*it);
@ -264,7 +263,7 @@ void deleteFromStore(const string & path)
void verifyStore()
{
Strings paths;
enumDB(nixDB, dbPath2Id, paths);
nixDB.enumTable(noTxn, dbPath2Id, paths);
for (Strings::iterator i = paths.begin();
i != paths.end(); i++)
@ -278,10 +277,10 @@ void verifyStore()
else {
string id;
if (!queryDB(nixDB, dbPath2Id, path, id)) abort();
if (!nixDB.queryString(noTxn, dbPath2Id, path, id)) abort();
Strings idPaths;
queryListDB(nixDB, dbId2Paths, id, idPaths);
nixDB.queryStrings(noTxn, dbId2Paths, id, idPaths);
bool found = false;
for (Strings::iterator j = idPaths.begin();
@ -298,11 +297,11 @@ void verifyStore()
debug(format("reverse mapping for path `%1%' missing") % path);
}
if (erase) delDB(nixDB, dbPath2Id, path);
if (erase) nixDB.delPair(noTxn, dbPath2Id, path);
}
Strings ids;
enumDB(nixDB, dbId2Paths, ids);
nixDB.enumTable(noTxn, dbId2Paths, ids);
for (Strings::iterator i = ids.begin();
i != ids.end(); i++)
@ -310,13 +309,13 @@ void verifyStore()
FSId id = parseHash(*i);
Strings idPaths;
queryListDB(nixDB, dbId2Paths, id, idPaths);
nixDB.queryStrings(noTxn, dbId2Paths, id, idPaths);
for (Strings::iterator j = idPaths.begin();
j != idPaths.end(); )
{
string id2;
if (!queryDB(nixDB, dbPath2Id, *j, id2) ||
if (!nixDB.queryString(noTxn, dbPath2Id, *j, id2) ||
id != parseHash(id2)) {
debug(format("erasing path `%1%' from mapping for id %2%")
% *j % (string) id);
@ -324,12 +323,12 @@ void verifyStore()
} else j++;
}
setListDB(nixDB, dbId2Paths, id, idPaths);
nixDB.setStrings(noTxn, dbId2Paths, id, idPaths);
}
Strings subs;
enumDB(nixDB, dbSubstitutes, subs);
nixDB.enumTable(noTxn, dbSubstitutes, subs);
for (Strings::iterator i = subs.begin();
i != subs.end(); i++)
@ -337,7 +336,7 @@ void verifyStore()
FSId srcId = parseHash(*i);
Strings subIds;
queryListDB(nixDB, dbSubstitutes, srcId, subIds);
nixDB.queryStrings(noTxn, dbSubstitutes, srcId, subIds);
for (Strings::iterator j = subIds.begin();
j != subIds.end(); )
@ -345,7 +344,7 @@ void verifyStore()
FSId subId = parseHash(*j);
Strings subPaths;
queryListDB(nixDB, dbId2Paths, subId, subPaths);
nixDB.queryStrings(noTxn, dbId2Paths, subId, subPaths);
if (subPaths.size() == 0) {
debug(format("erasing substitute %1% for %2%")
% (string) subId % (string) srcId);
@ -353,11 +352,11 @@ void verifyStore()
} else j++;
}
setListDB(nixDB, dbSubstitutes, srcId, subIds);
nixDB.setStrings(noTxn, dbSubstitutes, srcId, subIds);
}
Strings sucs;
enumDB(nixDB, dbSuccessors, sucs);
nixDB.enumTable(noTxn, dbSuccessors, sucs);
for (Strings::iterator i = sucs.begin();
i != sucs.end(); i++)
@ -365,17 +364,17 @@ void verifyStore()
FSId id1 = parseHash(*i);
string id2;
if (!queryDB(nixDB, dbSuccessors, id1, id2)) abort();
if (!nixDB.queryString(noTxn, dbSuccessors, id1, id2)) abort();
Strings id2Paths;
queryListDB(nixDB, dbId2Paths, id2, id2Paths);
nixDB.queryStrings(noTxn, dbId2Paths, id2, id2Paths);
if (id2Paths.size() == 0) {
Strings id2Subs;
queryListDB(nixDB, dbSubstitutes, id2, id2Subs);
nixDB.queryStrings(noTxn, dbSubstitutes, id2, id2Subs);
if (id2Subs.size() == 0) {
debug(format("successor %1% for %2% missing")
% id2 % (string) id1);
delDB(nixDB, dbSuccessors, (string) id1);
nixDB.delPair(noTxn, dbSuccessors, (string) id1);
}
}
}