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authorrowanbeentje <rowan@beent.je>2009-10-13 20:44:37 +0000
committerrowanbeentje <rowan@beent.je>2009-10-13 20:44:37 +0000
commit6ddd95658062b14de2f63746f69b6d65d05792d4 (patch)
tree8d42080bc1786326ee89afdc3aec07d2ab6229b1 /Frameworks/MCPKit
parent8a3267a14a21b4c01d05c25e3add0887233298c0 (diff)
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- Tweak query locking with MCPStreamingResults to fix certain operations releasing locks on different threads from which they were locked (which generates a console message)
Diffstat (limited to 'Frameworks/MCPKit')
-rw-r--r--Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h1
-rw-r--r--Frameworks/MCPKit/MCPFoundationKit/MCPConnection.m23
2 files changed, 21 insertions, 3 deletions
diff --git a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
index 8a9e2567..604b69d5 100644
--- a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
+++ b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.h
@@ -203,6 +203,7 @@ void performThreadedKeepAlive(void *ptr);
- (my_ulonglong)insertId;
// Locking
+- (void)lockConnection;
- (void)unlockConnection;
// Database structure
diff --git a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.m b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.m
index 86261d4d..4e6e0ada 100644
--- a/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.m
+++ b/Frameworks/MCPKit/MCPFoundationKit/MCPConnection.m
@@ -1352,7 +1352,14 @@ void performThreadedKeepAlive(void *ptr)
}
}
- [queryLock lock];
+ // Lock on this thread for normal result sets...
+ if (streamResultType == MCP_NO_STREAMING) {
+ [queryLock lock];
+
+ // ...but streaming result unlock on the main thread after processing, so ensure a lock on the main thread.
+ } else {
+ [self lockConnection];
+ }
// Run (or re-run) the query, timing the execution time of the query - note
// that this time will include network lag.
@@ -1480,11 +1487,21 @@ void performThreadedKeepAlive(void *ptr)
#pragma mark Connection locking
/**
- * Unlock the connection
+ * Lock the connection from any thread
+ */
+- (void)lockConnection
+{
+ if ([NSThread isMainThread]) [queryLock lock];
+ else [queryLock performSelectorOnMainThread:@selector(lock) withObject:nil waitUntilDone:YES];
+}
+
+/**
+ * Unlock the connection from any thread
*/
- (void)unlockConnection
{
- [queryLock performSelectorOnMainThread:@selector(unlock) withObject:nil waitUntilDone:YES];
+ if ([NSThread isMainThread]) [queryLock unlock];
+ else [queryLock performSelectorOnMainThread:@selector(unlock) withObject:nil waitUntilDone:YES];
}
#pragma mark -