Make the synchronization module interfaces more generic

[lttv.git] / lttv / lttv / sync / event_processing_lttng_null.c

diff --git a/lttv/lttv/sync/event_processing_lttng_null.c b/lttv/lttv/sync/event_processing_lttng_null.c
new file mode 100644 (file)
index 0000000..170ebf1
--- /dev/null
+++ b/lttv/lttv/sync/event_processing_lttng_null.c
@@ -0,0 +1,151 @@
+/* This file is part of the Linux Trace Toolkit viewer
+ * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "sync_chain_lttv.h"
+#include "event_processing_lttng_common.h"
+
+#include "event_processing_lttng_null.h"
+
+
+#ifndef g_info
+#define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
+#endif
+
+
+// Functions common to all processing modules
+static void initProcessingLTTVNull(SyncState* const syncState,
+       LttvTracesetContext* const traceSetContext);
+static void destroyProcessingLTTVNull(SyncState* const syncState);
+
+static void finalizeProcessingLTTVNull(SyncState* const syncState);
+
+// Functions specific to this module
+static void registerProcessingLTTVNull() __attribute__((constructor (102)));
+static gboolean processEventLTTVNull(void* hookData, void* callData);
+
+
+static ProcessingModule processingModuleLTTVNull = {
+       .name= "LTTV-null",
+       .initProcessing= &initProcessingLTTVNull,
+       .destroyProcessing= &destroyProcessingLTTVNull,
+       .finalizeProcessing= &finalizeProcessingLTTVNull,
+       .printProcessingStats= NULL,
+       .writeProcessingGraphsPlots= NULL,
+       .writeProcessingGraphsOptions= NULL,
+};
+
+
+
+/*
+ * Processing Module registering function
+ */
+static void registerProcessingLTTVNull()
+{
+       g_queue_push_tail(&processingModules, &processingModuleLTTVNull);
+
+       createQuarks();
+}
+
+
+/*
+ * Allocate and initialize data structures for synchronizing a traceset.
+ * Register event hooks.
+ *
+ * Args:
+ *   syncState:    container for synchronization data.
+ *                 This function allocates these processingData members:
+ *                 hookListList
+ *   traceSetContext: set of LTTV traces
+ */
+static void initProcessingLTTVNull(SyncState* const syncState,
+       LttvTracesetContext* const traceSetContext)
+{
+       ProcessingDataLTTVNull* processingData;
+
+       processingData= malloc(sizeof(ProcessingDataLTTVNull));
+       syncState->processingData= processingData;
+       processingData->traceSetContext= traceSetContext;
+
+       processingData->hookListList= g_array_sized_new(FALSE, FALSE,
+               sizeof(GArray*), syncState->traceNb);
+
+       registerHooks(processingData->hookListList, traceSetContext,
+               &processEventLTTVNull, syncState);
+}
+
+
+/*
+ * Nothing to do
+ *
+ * Args:
+ *   syncState     container for synchronization data.
+ */
+static void finalizeProcessingLTTVNull(SyncState* const syncState)
+{
+       return;
+}
+
+
+/*
+ * Unregister event hooks. Deallocate processingData.
+ *
+ * Args:
+ *   syncState:    container for synchronization data.
+ *                 This function deallocates these members:
+ *                 hookListList
+ */
+static void destroyProcessingLTTVNull(SyncState* const syncState)
+{
+       ProcessingDataLTTVNull* processingData;
+
+       processingData= (ProcessingDataLTTVNull*) syncState->processingData;
+
+       if (processingData == NULL)
+       {
+               return;
+       }
+
+       unregisterHooks(processingData->hookListList,
+               processingData->traceSetContext);
+
+       free(syncState->processingData);
+       syncState->processingData= NULL;
+}
+
+
+/*
+ * Lttv hook function that will be called for network events
+ *
+ * Args:
+ *   hookData:     LttvTraceHook* for the type of event that generated the call
+ *   callData:     LttvTracefileContext* at the moment of the event
+ *
+ * Returns:
+ *   FALSE         Always returns FALSE, meaning to keep processing hooks for
+ *                 this event
+ */
+static gboolean processEventLTTVNull(void* hookData, void* callData)
+{
+       return FALSE;
+}