1 /*****************************************************************************
2 * RRDtool 1.2.23 Copyright by Tobi Oetiker, 1997-2007
3 *****************************************************************************
4 * rrdlib.h Public header file for librrd
5 *****************************************************************************
8 * Revision 1.9 2005/02/13 16:13:33 oetiker
9 * let rrd_graph return the actual value range it picked ...
10 * -- Henrik Stoerner <henrik@hswn.dk>
12 * Revision 1.8 2004/05/26 22:11:12 oetiker
13 * reduce compiler warnings. Many small fixes. -- Mike Slifcak <slif@bellsouth.net>
15 * Revision 1.7 2003/11/12 22:14:26 oetiker
16 * allow to pass an open filehandle into rrd_graph as an extra argument
18 * Revision 1.6 2003/11/11 19:46:21 oetiker
19 * replaced time_value with rrd_time_value as MacOS X introduced a struct of that name in their standard headers
21 * Revision 1.5 2003/04/25 18:35:08 jake
22 * Alternate update interface, updatev. Returns info about CDPs written to disk as result of update. Output format is similar to rrd_info, a hash of key-values.
24 * Revision 1.4 2003/04/01 22:52:23 jake
25 * Fix Win32 build. VC++ 6.0 and 7.0 now use the thread-safe code.
27 * Revision 1.3 2003/02/13 07:05:27 oetiker
28 * Find attached the patch I promised to send to you. Please note that there
29 * are three new source files (src/rrd_is_thread_safe.h, src/rrd_thread_safe.c
30 * and src/rrd_not_thread_safe.c) and the introduction of librrd_th. This
31 * library is identical to librrd, but it contains support code for per-thread
32 * global variables currently used for error information only. This is similar
33 * to how errno per-thread variables are implemented. librrd_th must be linked
34 * alongside of libpthred
36 * There is also a new file "THREADS", holding some documentation.
38 * -- Peter Stamfest <peter@stamfest.at>
40 * Revision 1.2 2002/05/07 21:58:32 oetiker
41 * new command rrdtool xport integrated
42 * -- Wolfgang Schrimm <Wolfgang.Schrimm@urz.uni-heidelberg.de>
44 * Revision 1.1.1.1 2001/02/25 22:25:05 oetiker
47 *****************************************************************************/
55 #include <sys/types.h> /* for off_t */
56 #include <unistd.h> /* for off_t */
58 #include <stdio.h> /* for FILE */
60 /* Transplanted from rrd_format.h */
61 typedef double rrd_value_t; /* the data storage type is
63 /* END rrd_format.h */
65 /* information about an rrd file */
66 typedef struct rrd_file_t {
67 int fd; /* file descriptor if this rrd file */
68 char *file_start; /* start address of an open rrd file */
69 off_t header_len; /* length of the header of this rrd file */
70 off_t file_len; /* total size of the rrd file */
71 off_t pos; /* current pos in file */
74 /* main function blocks */
91 unsigned char *rrd_graph_in_memory(
128 char *rrd_strversion(
143 /* thread-safe (hopefully) */
145 const char *filename,
146 unsigned long pdp_step,
150 /* NOTE: rrd_update_r are only thread-safe if no at-style time
151 specifications get used!!! */
154 const char *filename,
155 const char *_template,
159 const char *filename,
164 unsigned long *ds_cnt,
168 const char *filename,
171 const char *filename);
173 const char *filename,
176 /* Transplanted from parsetime.h */
179 RELATIVE_TO_START_TIME,
185 struct rrd_time_value {
193 struct rrd_time_value *ptv);
194 /* END parsetime.h */
203 /* returns the current per-thread rrd_context */
204 struct rrd_context *rrd_get_context(
209 struct rrd_time_value *,
210 struct rrd_time_value *,
214 /* HELPER FUNCTIONS */
218 void rrd_clear_error(
225 /** MULTITHREADED HELPER FUNCTIONS */
226 struct rrd_context *rrd_new_context(
228 void rrd_free_context(
229 struct rrd_context *buf);
231 /* void rrd_set_error_r (struct rrd_context *, char *, ...); */
232 /* void rrd_clear_error_r(struct rrd_context *); */
233 /* int rrd_test_error_r (struct rrd_context *); */
234 /* char *rrd_get_error_r (struct rrd_context *); */
239 #endif /* _RRDLIB_H */