X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=liblttkconsumerd%2Flttkconsumerd.h;fp=liblttkconsumerd%2Flttkconsumerd.h;h=d085a795067c1cd4b295d24f1b8ce660714b2581;hp=0000000000000000000000000000000000000000;hb=50ecdf72034d220d3b0300d0caa13e6946be555b;hpb=ca3c5ac0cf100d80352a1a81936b5adc47942f35

diff --git a/liblttkconsumerd/lttkconsumerd.h b/liblttkconsumerd/lttkconsumerd.h
new file mode 100644
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+++ b/liblttkconsumerd/lttkconsumerd.h
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+/*
+ * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * 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.
+ */
+
+#ifndef _LIBLTTKCONSUMERD_H
+#define _LIBLTTKCONSUMERD_H
+
+#include <lttng/lttng-sessiond-comm.h>
+#include "lttng-kconsumerd.h"
+
+/*
+ * When the receiving thread dies, we need to have a way to make
+ * the polling thread exit eventually.
+ * If all FDs hang up (normal case when the ltt-sessiond stops),
+ * we can exit cleanly, but if there is a problem and for whatever
+ * reason some FDs remain open, the consumer should still exit eventually.
+ *
+ * If the timeout is reached, it means that during this period
+ * no events occurred on the FDs so we need to force an exit.
+ * This case should not happen but it is a safety to ensure we won't block
+ * the consumer indefinitely.
+ *
+ * The value of 2 seconds is an arbitrary choice.
+ */
+#define KCONSUMERD_POLL_GRACE_PERIOD 2000
+
+struct kconsumerd_fd_list {
+	struct cds_list_head head;
+};
+
+/*
+ * Internal representation of the FDs,
+ * sessiond_fd is used to identify uniquely a fd
+ */
+struct kconsumerd_fd {
+	struct cds_list_head list;
+	int sessiond_fd; /* used to identify uniquely a fd with sessiond */
+	int consumerd_fd; /* fd to consume */
+	int out_fd; /* output file to write the data */
+	off_t out_fd_offset; /* write position in the output file descriptor */
+	char path_name[PATH_MAX]; /* tracefile name */
+	enum kconsumerd_fd_state state;
+	unsigned long max_sb_size; /* the subbuffer size for this channel */
+};
+
+int kconsumerd_init(void);
+int kconsumerd_send_error(enum lttcomm_return_code cmd);
+int kconsumerd_poll_socket(struct pollfd *kconsumerd_sockpoll);
+void *kconsumerd_thread_poll_fds(void *data);
+void *kconsumerd_thread_receive_fds(void *data);
+void kconsumerd_should_exit(void);
+void kconsumerd_cleanup(void);
+void kconsumerd_set_error_socket(int sock);
+void kconsumerd_set_command_socket_path(char *sock);
+
+#endif /* _LIBLTTKCONSUMERD_H */