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Bug 505550 - Acquire the db's mutex when cloning statements in Connection::ExecuteAsync

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Hold the lock around all our API calls so we don't lose so much to the
background thread.
r=asuth
This commit is contained in:
Shawn Wilsher 2009-07-22 15:18:33 -07:00
parent 5a66fb8a7c
commit 6631ab6c3b
1 changed files with 38 additions and 32 deletions
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70
storage/src/mozStorageConnection.cpp
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@ -630,42 +630,45 @@ Connection::ExecuteAsync(mozIStorageStatement **aStatements,
{
int rc = SQLITE_OK;
nsTArray<StatementData> stmts(aNumStatements);
for (PRUint32 i = 0; i < aNumStatements && rc == SQLITE_OK; i++) {
sqlite3_stmt *old_stmt =
static_cast<Statement *>(aStatements[i])->nativeStatement();
if (!old_stmt) {
rc = SQLITE_MISUSE;
break;
}
NS_ASSERTION(::sqlite3_db_handle(old_stmt) == mDBConn,
"Statement must be from this database connection!");
{
SQLiteMutexAutoLock lockedScope(mDBMutex);
for (PRUint32 i = 0; i < aNumStatements && rc == SQLITE_OK; i++) {
sqlite3_stmt *old_stmt =
static_cast<Statement *>(aStatements[i])->nativeStatement();
if (!old_stmt) {
rc = SQLITE_MISUSE;
break;
}
NS_ASSERTION(::sqlite3_db_handle(old_stmt) == mDBConn,
"Statement must be from this database connection!");
// Clone this statement. We only need a sqlite3_stmt object, so we can
// avoid all the extra work that making a new Statement would normally
// involve and use the SQLite API.
sqlite3_stmt *new_stmt;
rc = ::sqlite3_prepare_v2(mDBConn, ::sqlite3_sql(old_stmt), -1, &new_stmt,
NULL);
if (rc != SQLITE_OK)
break;
// Clone this statement. We only need a sqlite3_stmt object, so we can
// avoid all the extra work that making a new Statement would normally
// involve and use the SQLite API.
sqlite3_stmt *new_stmt;
rc = ::sqlite3_prepare_v2(mDBConn, ::sqlite3_sql(old_stmt), -1, &new_stmt,
NULL);
if (rc != SQLITE_OK)
break;
#ifdef PR_LOGGING
PR_LOG(gStorageLog, PR_LOG_NOTICE,
("Cloned statement 0x%p to 0x%p", old_stmt, new_stmt));
PR_LOG(gStorageLog, PR_LOG_NOTICE,
("Cloned statement 0x%p to 0x%p", old_stmt, new_stmt));
#endif
// Transfer the bindings
rc = sqlite3_transfer_bindings(old_stmt, new_stmt);
if (rc != SQLITE_OK)
break;
// Transfer the bindings
rc = sqlite3_transfer_bindings(old_stmt, new_stmt);
if (rc != SQLITE_OK)
break;
Statement *storageStmt = static_cast<Statement *>(aStatements[i]);
StatementData data(new_stmt, storageStmt->bindingParamsArray());
if (!stmts.AppendElement(data)) {
rc = SQLITE_NOMEM;
break;
}
}
Statement *storageStmt = static_cast<Statement *>(aStatements[i]);
StatementData data(new_stmt, storageStmt->bindingParamsArray());
if (!stmts.AppendElement(data)) {
rc = SQLITE_NOMEM;
break;
}
} // for loop
} // locked Scope
// Dispatch to the background
nsresult rv = NS_OK;
@ -682,8 +685,11 @@ Connection::ExecuteAsync(mozIStorageStatement **aStatements,
}
// Always reset all the statements
for (PRUint32 i = 0; i < aNumStatements; i++)
(void)aStatements[i]->Reset();
{
SQLiteMutexAutoLock lockedScope(mDBMutex);
for (PRUint32 i = 0; i < aNumStatements; i++)
(void)aStatements[i]->Reset();
}
return rv;
}