| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License Version 2 as |
| 6 | * published by the Free Software Foundation; |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 16 | * MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifdef HAVE_CONFIG_H |
| 20 | #include <config.h> |
| 21 | #endif |
| 22 | |
| 23 | #include <stdarg.h> |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | #include "sync_chain.h" |
| 27 | #include "event_processing_lttng_common.h" |
| 28 | |
| 29 | #include "event_processing_lttng_null.h" |
| 30 | |
| 31 | |
| 32 | // Functions common to all processing modules |
| 33 | static void initProcessingLTTVNull(SyncState* const syncState, ...); |
| 34 | static void destroyProcessingLTTVNull(SyncState* const syncState); |
| 35 | |
| 36 | static void finalizeProcessingLTTVNull(SyncState* const syncState); |
| 37 | |
| 38 | // Functions specific to this module |
| 39 | static void registerProcessingLTTVNull() __attribute__((constructor (102))); |
| 40 | static gboolean processEventLTTVNull(void* hookData, void* callData); |
| 41 | |
| 42 | |
| 43 | static ProcessingModule processingModuleLTTVNull = { |
| 44 | .name= "LTTV-null", |
| 45 | .initProcessing= &initProcessingLTTVNull, |
| 46 | .destroyProcessing= &destroyProcessingLTTVNull, |
| 47 | .finalizeProcessing= &finalizeProcessingLTTVNull, |
| 48 | }; |
| 49 | |
| 50 | |
| 51 | |
| 52 | /* |
| 53 | * Processing Module registering function |
| 54 | */ |
| 55 | static void registerProcessingLTTVNull() |
| 56 | { |
| 57 | g_queue_push_tail(&processingModules, &processingModuleLTTVNull); |
| 58 | |
| 59 | createQuarks(); |
| 60 | } |
| 61 | |
| 62 | |
| 63 | /* |
| 64 | * Allocate and initialize data structures for synchronizing a traceset. |
| 65 | * Register event hooks. |
| 66 | * |
| 67 | * Args: |
| 68 | * syncState: container for synchronization data. |
| 69 | * This function allocates these processingData members: |
| 70 | * hookListList |
| 71 | * traceSetContext: LttvTracesetContext*, set of LTTV traces |
| 72 | */ |
| 73 | static void initProcessingLTTVNull(SyncState* const syncState, ...) |
| 74 | { |
| 75 | ProcessingDataLTTVNull* processingData; |
| 76 | va_list ap; |
| 77 | |
| 78 | processingData= malloc(sizeof(ProcessingDataLTTVNull)); |
| 79 | syncState->processingData= processingData; |
| 80 | va_start(ap, syncState); |
| 81 | processingData->traceSetContext= va_arg(ap, LttvTracesetContext*); |
| 82 | va_end(ap); |
| 83 | syncState->traceNb= |
| 84 | lttv_traceset_number(processingData->traceSetContext->ts); |
| 85 | processingData->hookListList= g_array_sized_new(FALSE, FALSE, |
| 86 | sizeof(GArray*), syncState->traceNb); |
| 87 | |
| 88 | registerHooks(processingData->hookListList, |
| 89 | processingData->traceSetContext, &processEventLTTVNull, syncState, |
| 90 | syncState->matchingModule->canMatch); |
| 91 | } |
| 92 | |
| 93 | |
| 94 | /* |
| 95 | * Nothing to do |
| 96 | * |
| 97 | * Args: |
| 98 | * syncState container for synchronization data. |
| 99 | */ |
| 100 | static void finalizeProcessingLTTVNull(SyncState* const syncState) |
| 101 | { |
| 102 | return; |
| 103 | } |
| 104 | |
| 105 | |
| 106 | /* |
| 107 | * Unregister event hooks. Deallocate processingData. |
| 108 | * |
| 109 | * Args: |
| 110 | * syncState: container for synchronization data. |
| 111 | * This function deallocates these members: |
| 112 | * hookListList |
| 113 | */ |
| 114 | static void destroyProcessingLTTVNull(SyncState* const syncState) |
| 115 | { |
| 116 | ProcessingDataLTTVNull* processingData; |
| 117 | |
| 118 | processingData= (ProcessingDataLTTVNull*) syncState->processingData; |
| 119 | |
| 120 | if (processingData == NULL) |
| 121 | { |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | unregisterHooks(processingData->hookListList, |
| 126 | processingData->traceSetContext); |
| 127 | |
| 128 | free(syncState->processingData); |
| 129 | syncState->processingData= NULL; |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /* |
| 134 | * Lttv hook function that will be called for network events |
| 135 | * |
| 136 | * Args: |
| 137 | * hookData: LttvTraceHook* for the type of event that generated the call |
| 138 | * callData: LttvTracefileContext* at the moment of the event |
| 139 | * |
| 140 | * Returns: |
| 141 | * FALSE Always returns FALSE, meaning to keep processing hooks for |
| 142 | * this event |
| 143 | */ |
| 144 | static gboolean processEventLTTVNull(void* hookData, void* callData) |
| 145 | { |
| 146 | return FALSE; |
| 147 | } |