#include <babeltrace/babeltrace.h>
#include <babeltrace/context.h>
+#include <babeltrace/context-internal.h>
+#include <babeltrace/trace-handle.h>
+#include <babeltrace/trace-handle-internal.h>
+#include <babeltrace/trace-collection.h>
+#include <babeltrace/format.h>
#include <stdlib.h>
-struct bt_context *bt_context_create(struct trace_collection *tc)
+#include <fts.h>
+#include <fcntl.h> /* For O_RDONLY */
+
+/* TODO ybrosseau: should be hidden in the CTF format */
+#include <babeltrace/ctf/types.h> /* for ctf_move_pos_slow */
+
+#include <glib.h>
+
+struct bt_context *bt_context_create(void)
{
struct bt_context *ctx;
- ctx = calloc(1, sizeof(struct bt_context));
- if (ctx == NULL) {
- perror("allocating context");
- goto error;
- }
-
- ctx->tc = tc;
+ ctx = g_new0(struct bt_context, 1);
ctx->refcount = 1;
+ /* Negative handle id are errors. */
+ ctx->last_trace_handle_id = 0;
+
+ /* Instanciate the trace handle container */
+ ctx->trace_handles = g_hash_table_new_full(g_direct_hash,
+ g_direct_equal, NULL,
+ (GDestroyNotify) bt_trace_handle_destroy);
+
+ ctx->tc = g_new0(struct trace_collection, 1);
+ init_trace_collection(ctx->tc);
return ctx;
+}
-error:
- return NULL;
+int bt_context_add_trace(struct bt_context *ctx, const char *path,
+ const char *format_str)
+{
+ struct trace_descriptor *td;
+ struct format *fmt;
+ struct bt_trace_handle *handle;
+
+ fmt = bt_lookup_format(g_quark_from_string(format_str));
+ td = fmt->open_trace(path, O_RDONLY,
+ ctf_move_pos_slow, NULL);
+ if (!td) {
+ fprintf(stderr, "[error] [Context] Cannot open_trace of the format %s .\n\n",
+ path);
+ return -1;
+ }
+
+ /* Create an handle for the trace */
+ handle = bt_trace_handle_create(ctx);
+ if (handle < 0) {
+ fprintf(stderr, "[error] [Context] Creating trace handle %s .\n\n",
+ path);
+ return -1;
+ }
+ handle->format = fmt;
+ handle->td = td;
+ strncpy(handle->path, path, PATH_MAX);
+ handle->path[PATH_MAX - 1] = '\0';
+
+ /* Add new handle to container */
+ g_hash_table_insert(ctx->trace_handles,
+ (gpointer) (unsigned long) handle->id,
+ handle);
+ return trace_collection_add(ctx->tc, td);
}
-int bt_context_destroy(struct bt_context *ctx)
+/*
+ * Unable to open toplevel: failure.
+ * Unable to open some subdirectory or file: warn and continue;
+ */
+int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
+ const char *format_str)
{
- if (ctx) {
- if (ctx->refcount >= 1)
- goto ctx_used;
+ FTS *tree;
+ FTSENT *node;
+ GArray *trace_ids;
+ char lpath[PATH_MAX];
+ char * const paths[2] = { lpath, NULL };
+ int ret;
+
+ /*
+ * Need to copy path, because fts_open can change it.
+ * It is the pointer array, not the strings, that are constant.
+ */
+ strncpy(lpath, path, PATH_MAX);
+ lpath[PATH_MAX - 1] = '\0';
+
+ tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
+ if (tree == NULL) {
+ fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
+ path);
+ return -EINVAL;
+ }
+
+ trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
- free(ctx);
+ while ((node = fts_read(tree))) {
+ int dirfd, metafd;
+
+ if (!(node->fts_info & FTS_D))
+ continue;
+
+ dirfd = open(node->fts_accpath, 0);
+ if (dirfd < 0) {
+ fprintf(stderr, "[error] [Context] Unable to open trace "
+ "directory file descriptor.\n");
+ ret = dirfd;
+ goto error;
+ }
+ metafd = openat(dirfd, "metadata", O_RDONLY);
+ if (metafd < 0) {
+ ret = close(dirfd);
+ if (ret < 0) {
+ perror("close");
+ goto error;
+ }
+ } else {
+ int trace_id;
+
+ ret = close(metafd);
+ if (ret < 0) {
+ perror("close");
+ goto error;
+ }
+ ret = close(dirfd);
+ if (ret < 0) {
+ perror("close");
+ goto error;
+ }
+
+ trace_id = bt_context_add_trace(ctx,
+ node->fts_accpath, format_str);
+ if (trace_id < 0) {
+ fprintf(stderr, "[error] [Context] opening trace \"%s\" from %s "
+ "for reading.\n", node->fts_accpath, path);
+ ret = trace_id;
+ goto error;
+ }
+ g_array_append_val(trace_ids, trace_id);
+ }
}
+
+ g_array_free(trace_ids, TRUE);
return 0;
-ctx_used:
- return -1;
+error:
+ return ret;
}
-int bt_context_get(struct bt_context *ctx)
+void bt_context_remove_trace(struct bt_context *ctx, int handle_id)
{
- if (!ctx)
- return -1;
- ctx->refcount++;
- return 0;
+ struct bt_trace_handle *handle;
+
+ handle = g_hash_table_lookup(ctx->trace_handles,
+ (gpointer) (unsigned long) handle_id);
+ assert(handle != NULL);
+
+ /* Remove from containers */
+ trace_collection_remove(ctx->tc, handle->td);
+ g_hash_table_remove(ctx->trace_handles,
+ (gpointer) (unsigned long) handle_id);
+
+ /* Close the trace */
+ handle->format->close_trace(handle->td);
+
+ /* Destory the handle */
+ bt_trace_handle_destroy(handle);
}
-int bt_context_put(struct bt_context *ctx)
+static
+void bt_context_destroy(struct bt_context *ctx)
{
- if (!ctx)
- return -1;
+ finalize_trace_collection(ctx->tc);
+
+ /* Remote all traces. The g_hash_table_destroy will call
+ * bt_trace_handle_destroy on each elements.
+ */
+ g_hash_table_destroy(ctx->trace_handles);
+ /* ctx->tc should always be valid */
+ assert(ctx->tc != NULL);
+ g_free(ctx->tc);
+ g_free(ctx);
+}
+
+void bt_context_get(struct bt_context *ctx)
+{
+ ctx->refcount++;
+}
+
+void bt_context_put(struct bt_context *ctx)
+{
ctx->refcount--;
if (ctx->refcount == 0)
- return bt_context_destroy(ctx);
- return 0;
+ bt_context_destroy(ctx);
}
projects / babeltrace.git / blobdiff