+++ /dev/null
-/*
- * iterator.c
- *
- * Babeltrace Library
- *
- * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
- *
- * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- */
-
-#include <stdlib.h>
-#include <babeltrace/babeltrace.h>
-#include <babeltrace/callbacks-internal.h>
-#include <babeltrace/ctf/metadata.h>
-#include <babeltrace/iterator-internal.h>
-#include <babeltrace/prio_heap.h>
-
-struct stream_saved_pos {
- /*
- * Use file_stream pointer to check if the trace collection we
- * restore to match the one we saved from, for each stream.
- */
- struct ctf_file_stream *file_stream;
- size_t cur_index; /* current index in packet index */
- ssize_t offset; /* offset from base, in bits. EOF for end of file. */
-};
-
-struct babeltrace_saved_pos {
- struct trace_collection *tc;
- GArray *stream_saved_pos; /* Contains struct stream_saved_pos */
-};
-
-static int stream_read_event(struct ctf_file_stream *sin)
-{
- int ret;
-
- ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent);
- if (ret == EOF)
- return EOF;
- else if (ret) {
- fprintf(stdout, "[error] Reading event failed.\n");
- return ret;
- }
- return 0;
-}
-
-/*
- * returns true if a < b, false otherwise.
- */
-int stream_compare(void *a, void *b)
-{
- struct ctf_file_stream *s_a = a, *s_b = b;
-
- if (s_a->parent.timestamp < s_b->parent.timestamp)
- return 1;
- else
- return 0;
-}
-
-/*
- * babeltrace_filestream_seek: seek a filestream to given position.
- *
- * The stream_id parameter is only useful for BT_SEEK_RESTORE.
- */
-static int babeltrace_filestream_seek(struct ctf_file_stream *file_stream,
- const struct trace_collection_pos *begin_pos,
- unsigned long stream_id)
-{
- int ret = 0;
-
- switch (begin_pos->type) {
- case BT_SEEK_CUR:
- /*
- * just insert into the heap we should already know
- * the timestamps
- */
- break;
- case BT_SEEK_BEGIN:
- file_stream->pos.move_pos_slow(&file_stream->pos, 0, SEEK_SET);
- ret = stream_read_event(file_stream);
- break;
- case BT_SEEK_TIME:
- case BT_SEEK_RESTORE:
- case BT_SEEK_END:
- default:
- assert(0); /* Not yet defined */
- }
-
- return ret;
-}
-
-/*
- * babeltrace_iter_seek: seek iterator to given position.
- */
-int babeltrace_iter_seek(struct babeltrace_iter *iter,
- const struct trace_collection_pos *begin_pos)
-{
- int i, stream_id;
- int ret = 0;
- struct trace_collection *tc = iter->tc;
-
- for (i = 0; i < tc->array->len; i++) {
- struct ctf_trace *tin;
- struct trace_descriptor *td_read;
-
- td_read = g_ptr_array_index(tc->array, i);
- tin = container_of(td_read, struct ctf_trace, parent);
-
- /* Populate heap with each stream */
- for (stream_id = 0; stream_id < tin->streams->len;
- stream_id++) {
- struct ctf_stream_class *stream;
- int filenr;
-
- stream = g_ptr_array_index(tin->streams, stream_id);
- for (filenr = 0; filenr < stream->streams->len;
- filenr++) {
- struct ctf_file_stream *file_stream;
-
- file_stream = g_ptr_array_index(stream->streams,
- filenr);
- ret = babeltrace_filestream_seek(file_stream, begin_pos,
- stream_id);
- if (ret < 0)
- goto end;
- }
- }
- }
-end:
- return ret;
-}
-
-struct babeltrace_iter *babeltrace_iter_create(struct trace_collection *tc,
- struct trace_collection_pos *begin_pos,
- struct trace_collection_pos *end_pos)
-{
- int i, stream_id;
- int ret = 0;
- struct babeltrace_iter *iter;
-
- iter = malloc(sizeof(struct babeltrace_iter));
- if (!iter)
- goto error_malloc;
- iter->stream_heap = g_new(struct ptr_heap, 1);
- iter->tc = tc;
- iter->end_pos = end_pos;
- iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks));
- iter->recalculate_dep_graph = 0;
- iter->main_callbacks.callback = NULL;
- iter->dep_gc = g_ptr_array_new();
-
- ret = heap_init(iter->stream_heap, 0, stream_compare);
- if (ret < 0)
- goto error_heap_init;
-
- for (i = 0; i < tc->array->len; i++) {
- struct ctf_trace *tin;
- struct trace_descriptor *td_read;
-
- td_read = g_ptr_array_index(tc->array, i);
- tin = container_of(td_read, struct ctf_trace, parent);
-
- /* Populate heap with each stream */
- for (stream_id = 0; stream_id < tin->streams->len;
- stream_id++) {
- struct ctf_stream_class *stream;
- int filenr;
-
- stream = g_ptr_array_index(tin->streams, stream_id);
- if (!stream)
- continue;
- for (filenr = 0; filenr < stream->streams->len;
- filenr++) {
- struct ctf_file_stream *file_stream;
-
- file_stream = g_ptr_array_index(stream->streams,
- filenr);
-
- if (begin_pos) {
- ret = babeltrace_filestream_seek(file_stream, begin_pos,
- stream_id);
- if (ret == EOF) {
- ret = 0;
- continue;
- } else if (ret) {
- goto error;
- }
- }
- /* Add to heap */
- ret = heap_insert(iter->stream_heap, file_stream);
- if (ret)
- goto error;
- }
- }
- }
-
- return iter;
-
-error:
- heap_free(iter->stream_heap);
-error_heap_init:
- g_free(iter->stream_heap);
- free(iter);
-error_malloc:
- return NULL;
-}
-
-void babeltrace_iter_destroy(struct babeltrace_iter *iter)
-{
- struct bt_stream_callbacks *bt_stream_cb;
- struct bt_callback_chain *bt_chain;
- int i, j;
-
- heap_free(iter->stream_heap);
- g_free(iter->stream_heap);
-
- /* free all events callbacks */
- if (iter->main_callbacks.callback)
- g_array_free(iter->main_callbacks.callback, TRUE);
-
- /* free per-event callbacks */
- for (i = 0; i < iter->callbacks->len; i++) {
- bt_stream_cb = &g_array_index(iter->callbacks,
- struct bt_stream_callbacks, i);
- if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
- continue;
- for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) {
- bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
- struct bt_callback_chain, j);
- if (bt_chain->callback) {
- g_array_free(bt_chain->callback, TRUE);
- }
- }
- g_array_free(bt_stream_cb->per_id_callbacks, TRUE);
- }
-
- free(iter);
-}
-
-int babeltrace_iter_next(struct babeltrace_iter *iter)
-{
- struct ctf_file_stream *file_stream, *removed;
- int ret;
-
- file_stream = heap_maximum(iter->stream_heap);
- if (!file_stream) {
- /* end of file for all streams */
- ret = 0;
- goto end;
- }
-
- ret = stream_read_event(file_stream);
- if (ret == EOF) {
- removed = heap_remove(iter->stream_heap);
- assert(removed == file_stream);
- ret = 0;
- goto end;
- } else if (ret) {
- goto end;
- }
- /* Reinsert the file stream into the heap, and rebalance. */
- removed = heap_replace_max(iter->stream_heap, file_stream);
- assert(removed == file_stream);
-
-end:
- return ret;
-}
-
-int babeltrace_iter_read_event(struct babeltrace_iter *iter,
- struct ctf_stream **stream,
- struct ctf_stream_event **event)
-{
- struct ctf_file_stream *file_stream;
- int ret = 0;
-
- file_stream = heap_maximum(iter->stream_heap);
- if (!file_stream) {
- /* end of file for all streams */
- ret = EOF;
- goto end;
- }
- *stream = &file_stream->parent;
- *event = g_ptr_array_index((*stream)->events_by_id, (*stream)->event_id);
-
- if ((*stream)->stream_id > iter->callbacks->len)
- goto end;
-
- process_callbacks(iter, *stream);
-
-end:
- return ret;
-}
projects / babeltrace.git / blobdiff