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51 #include "gmx_fatal.h"
60 #include "gromacs/legacyheaders/thread_mpi/threads.h"
62 #include "gmxfio_int.h"
64 /* This is the new improved and thread safe version of gmxfio. */
68 /* the list of open files is a linked list, with a dummy element at its head;
69 it is initialized when the first file is opened. */
70 static t_fileio *open_files = NULL;
73 /* this mutex locks the open_files structure so that no two threads can
76 For now, we use this as a coarse grained lock on all file
77 insertion/deletion operations because it makes avoiding deadlocks
78 easier, and adds almost no overhead: the only overhead is during
79 opening and closing of files, or during global operations like
80 iterating along all open files. All these cases should be rare
81 during the simulation. */
82 static tMPI_Thread_mutex_t open_file_mutex = TMPI_THREAD_MUTEX_INITIALIZER;
85 /* These simple lists define the I/O type for these files */
86 static const int ftpXDR[] =
87 { efTPR, efTRR, efEDR, efXTC, efMTX, efCPT };
88 static const int ftpASC[] =
89 { efTPA, efGRO, efPDB };
90 static const int ftpBIN[] =
93 static const int ftpXML[] =
97 const char *itemstr[eitemNR] =
99 "[header]", "[inputrec]", "[box]", "[topology]", "[coordinates]",
100 "[velocities]", "[forces]"
103 const char *eioNames[eioNR] =
105 "REAL", "INT", "GMX_STE_T", "UCHAR", "NUCHAR", "USHORT", "RVEC", "NRVEC",
111 /* Comment strings for TPA only */
112 const char *comment_str[eitemNR] = {
113 "; The header holds information on the number of atoms etc. and on whether\n"
114 "; certain items are present in the file or not.\n"
117 "; DO NOT EDIT THIS FILE BY HAND\n"
118 "; The GROMACS preprocessor performs a lot of checks on your input that\n"
119 "; you ignore when editing this. Your simulation may crash because of this\n",
120 "; The inputrec holds the parameters for MD such as the number of steps,\n"
121 "; the timestep and the cut-offs.\n",
122 "; The simulation box in nm.\n",
123 "; The topology section describes the topology of the molecules\n"
124 "; i.e. bonds, angles and dihedrals etc. and also holds the force field\n"
126 "; The atomic coordinates in nm\n",
127 "; The atomic velocities in nm/ps\n",
128 "; The forces on the atoms in nm/ps^2\n"
134 /******************************************************************
136 * Internal functions:
138 ******************************************************************/
140 static int gmx_fio_int_flush(t_fileio* fio)
146 rc = fflush(fio->fp);
150 rc = fflush((FILE *) fio->xdr->x_private);
156 /* returns TRUE if the file type ftp is in the set set */
157 static gmx_bool in_ftpset(int ftp, int nset, const int set[])
163 for (i = 0; (i < nset); i++)
176 extern void gmx_fio_set_comment(t_fileio *fio, const char *comment)
178 fio->comment = comment;
181 extern void gmx_fio_unset_comment(t_fileio *fio)
187 const char *gmx_fio_dbgstr(t_fileio *fio, const char *desc, char *buf)
191 /* set to empty string */
196 snprintf(buf, GMX_FIO_BUFLEN, " ; %s %s", fio->comment ? fio->comment : "", desc);
202 /* check the number of items given against the type */
203 void gmx_fio_check_nitem(int eio, int nitem, const char *file, int line)
205 if ((nitem != 1) && !((eio == eioNRVEC) || (eio == eioNUCHAR)))
208 "nitem (%d) may differ from 1 only for %s or %s, not for %s"
209 "(%s, %d)", nitem, eioNames[eioNUCHAR], eioNames[eioNRVEC],
210 eioNames[eio], file, line);
215 /* output a data type error. */
216 void gmx_fio_fe(t_fileio *fio, int eio, const char *desc,
217 const char *srcfile, int line)
220 gmx_fatal(FARGS, "Trying to %s %s type %d (%s), src %s, line %d",
221 fio->bRead ? "read" : "write", desc, eio,
222 ((eio >= 0) && (eio < eioNR)) ? eioNames[eio] : "unknown",
227 /* set the reader/writer functions based on the file type */
228 static void gmx_fio_set_iotype(t_fileio *fio)
230 if (in_ftpset(fio->iFTP, asize(ftpXDR), ftpXDR))
233 fio->iotp = &xdr_iotype;
235 gmx_fatal(FARGS, "Sorry, no XDR");
238 else if (in_ftpset(fio->iFTP, asize(ftpASC), ftpASC))
240 fio->iotp = &asc_iotype;
242 else if (in_ftpset(fio->iFTP, asize(ftpBIN), ftpBIN))
244 fio->iotp = &bin_iotype;
247 else if (in_ftpset(fio->iFTP, asize(ftpXML), ftpXML))
249 fio->iotp = &dummy_iotype;
254 fio->iotp = &dummy_iotype;
259 /* lock the mutex associated with this fio. This needs to be done for every
260 type of access to the fio's elements. */
261 void gmx_fio_lock(t_fileio *fio)
263 tMPI_Lock_lock(&(fio->mtx));
265 /* unlock the mutex associated with this fio. */
266 void gmx_fio_unlock(t_fileio *fio)
268 tMPI_Lock_unlock(&(fio->mtx));
271 /* make a dummy head element, assuming we locked everything. */
272 static void gmx_fio_make_dummy(void)
277 open_files->fp = NULL;
278 open_files->fn = NULL;
279 open_files->next = open_files;
280 open_files->prev = open_files;
281 tMPI_Lock_init(&(open_files->mtx));
291 /***********************************************************************
293 * FILE LIST OPERATIONS
295 ***********************************************************************/
298 /* insert a new t_fileio into the list */
299 static void gmx_fio_insert(t_fileio *fio)
302 /* first lock the big open_files mutex. */
303 tMPI_Thread_mutex_lock(&open_file_mutex);
304 /* now check whether the dummy element has been allocated,
305 and allocate it if it hasn't */
306 gmx_fio_make_dummy();
308 /* and lock the fio we got and the list's head **/
310 gmx_fio_lock(open_files);
311 prev = open_files->prev;
312 /* lock the element after the current one */
313 if (prev != open_files)
318 /* now do the actual insertion: */
319 fio->next = open_files;
320 open_files->prev = fio;
324 /* now unlock all our locks */
325 if (prev != open_files)
327 gmx_fio_unlock(prev);
329 gmx_fio_unlock(open_files);
332 /* now unlock the big open_files mutex. */
333 tMPI_Thread_mutex_unlock(&open_file_mutex);
336 /* remove a t_fileio into the list. We assume the fio is locked, and we leave
338 NOTE: We also assume that the open_file_mutex has been locked */
339 static void gmx_fio_remove(t_fileio *fio)
343 /* lock prev, because we're changing it */
344 gmx_fio_lock(fio->prev);
346 /* now set the prev's pointer */
347 fio->prev->next = fio->next;
348 gmx_fio_unlock(fio->prev);
350 /* with the next ptr, we can simply lock while the original was locked */
351 gmx_fio_lock(fio->next);
352 fio->next->prev = fio->prev;
353 gmx_fio_unlock(fio->next);
355 /* and make sure we point nowhere in particular */
356 fio->next = fio->prev = fio;
360 /* get the first open file, or NULL if there is none.
361 Returns a locked fio. */
362 static t_fileio *gmx_fio_get_first(void)
365 /* first lock the big open_files mutex and the dummy's mutex */
367 /* first lock the big open_files mutex. */
368 tMPI_Thread_mutex_lock(&open_file_mutex);
369 gmx_fio_make_dummy();
371 gmx_fio_lock(open_files);
372 ret = open_files->next;
375 /* check whether there were any to begin with */
376 if (ret == open_files)
378 /* after this, the open_file pointer should never change */
383 gmx_fio_lock(open_files->next);
385 gmx_fio_unlock(open_files);
391 /* get the next open file, or NULL if there is none.
392 Unlocks the previous fio and locks the next one. */
393 static t_fileio *gmx_fio_get_next(t_fileio *fio)
398 /* check if that was the last one */
399 if (fio->next == open_files)
402 tMPI_Thread_mutex_unlock(&open_file_mutex);
413 /* Stop looping through the open_files. Unlocks the global lock. */
414 static void gmx_fio_stop_getting_next(t_fileio *fio)
417 tMPI_Thread_mutex_unlock(&open_file_mutex);
423 /*****************************************************************
427 *****************************************************************/
428 t_fileio *gmx_fio_open(const char *fn, const char *mode)
430 t_fileio *fio = NULL;
433 gmx_bool bRead, bReadWrite;
436 if (fn2ftp(fn) == efTPA)
438 strcpy(newmode, mode);
442 /* sanitize the mode string */
443 if (strncmp(mode, "r+", 2) == 0)
445 strcpy(newmode, "r+");
447 else if (mode[0] == 'r')
449 strcpy(newmode, "r");
451 else if (strncmp(mode, "w+", 2) == 0)
453 strcpy(newmode, "w+");
455 else if (mode[0] == 'w')
457 strcpy(newmode, "w");
459 else if (strncmp(mode, "a+", 2) == 0)
461 strcpy(newmode, "a+");
463 else if (mode[0] == 'a')
465 strcpy(newmode, "a");
469 gmx_fatal(FARGS, "DEATH HORROR in gmx_fio_open, mode is '%s'", mode);
473 /* Check if it should be opened as a binary file */
474 if (strncmp(ftp2ftype(fn2ftp(fn)), "ASCII", 5))
476 /* Not ascii, add b to file mode */
477 if ((strchr(newmode, 'b') == NULL) && (strchr(newmode, 'B') == NULL))
479 strcat(newmode, "b");
484 tMPI_Lock_init(&(fio->mtx));
485 bRead = (newmode[0] == 'r' && newmode[1] != '+');
486 bReadWrite = (newmode[1] == '+');
491 fio->iFTP = fn2ftp(fn);
492 fio->fn = strdup(fn);
495 /* If this file type is in the list of XDR files, open it like that */
496 if (in_ftpset(fio->iFTP, asize(ftpXDR), ftpXDR))
498 /* First check whether we have to make a backup,
499 * only for writing, not for read or append.
501 if (newmode[0] == 'w')
504 /* only make backups for normal gromacs */
510 /* Check whether file exists */
517 fio->fp = ffopen(fn, newmode);
519 /* determine the XDR direction */
520 if (newmode[0] == 'w' || newmode[0] == 'a')
522 fio->xdrmode = XDR_ENCODE;
526 fio->xdrmode = XDR_DECODE;
530 xdrstdio_create(fio->xdr, fio->fp, fio->xdrmode);
534 /* If it is not, open it as a regular file */
535 fio->fp = ffopen(fn, newmode);
538 /* for appending seek to end of file to make sure ftell gives correct position
539 * important for checkpointing */
540 if (newmode[0] == 'a')
542 gmx_fseek(fio->fp, 0, SEEK_END);
547 /* Use stdin/stdout for I/O */
549 fio->fp = bRead ? stdin : stdout;
550 fio->fn = strdup("STDIO");
554 fio->bReadWrite = bReadWrite;
555 fio->bDouble = (sizeof(real) == sizeof(double));
558 fio->bLargerThan_off_t = FALSE;
560 /* set the reader/writer functions */
561 gmx_fio_set_iotype(fio);
563 /* and now insert this file into the list of open files. */
568 static int gmx_fio_close_locked(t_fileio *fio)
574 gmx_fatal(FARGS, "File %s closed twice!\n", fio->fn);
577 if (in_ftpset(fio->iFTP, asize(ftpXDR), ftpXDR))
579 xdr_destroy(fio->xdr);
583 /* Don't close stdin and stdout! */
584 if (!fio->bStdio && fio->fp != NULL)
586 rc = ffclose(fio->fp); /* fclose returns 0 if happy */
594 int gmx_fio_close(t_fileio *fio)
598 /* first lock the big open_files mutex. */
599 /* We don't want two processes operating on the list at the same time */
600 tMPI_Thread_mutex_lock(&open_file_mutex);
603 /* first remove it from the list */
605 rc = gmx_fio_close_locked(fio);
611 tMPI_Thread_mutex_unlock(&open_file_mutex);
616 /* close only fp but keep FIO entry. */
617 int gmx_fio_fp_close(t_fileio *fio)
621 if (!in_ftpset(fio->iFTP, asize(ftpXDR), ftpXDR) && !fio->bStdio)
623 rc = ffclose(fio->fp); /* fclose returns 0 if happy */
631 FILE * gmx_fio_fopen(const char *fn, const char *mode)
636 fio = gmx_fio_open(fn, mode);
644 int gmx_fio_fclose(FILE *fp)
647 t_fileio *found = NULL;
650 cur = gmx_fio_get_first();
655 rc = gmx_fio_close_locked(cur);
657 gmx_fio_stop_getting_next(cur);
662 cur = gmx_fio_get_next(cur);
668 /* internal variant of get_file_md5 that operates on a locked file */
669 static int gmx_fio_int_get_file_md5(t_fileio *fio, gmx_off_t offset,
670 unsigned char digest[])
672 /*1MB: large size important to catch almost identical files */
673 #define CPT_CHK_LEN 1048576
675 unsigned char buf[CPT_CHK_LEN];
677 gmx_off_t seek_offset;
680 seek_offset = offset - CPT_CHK_LEN;
685 read_len = offset - seek_offset;
688 if (fio->fp && fio->bReadWrite)
690 ret = gmx_fseek(fio->fp, seek_offset, SEEK_SET);
693 gmx_fseek(fio->fp, 0, SEEK_END);
696 if (ret) /*either no fp, not readwrite, or fseek not successful */
701 /* the read puts the file position back to offset */
702 if ((gmx_off_t)fread(buf, 1, read_len, fio->fp) != read_len)
704 /* not fatal: md5sum check to prevent overwriting files
705 * works (less safe) without
709 fprintf(stderr, "\nTrying to get md5sum: %s: %s\n", fio->fn,
712 else if (feof(fio->fp))
715 * For long runs that checkpoint frequently but write e.g. logs
716 * infrequently we don't want to issue lots of warnings before we
717 * have written anything to the log.
721 fprintf(stderr, "\nTrying to get md5sum: EOF: %s\n", fio->fn);
728 "\nTrying to get md5sum: Unknown reason for short read: %s\n",
732 gmx_fseek(fio->fp, 0, SEEK_END);
736 gmx_fseek(fio->fp, 0, SEEK_END); /*is already at end, but under windows
737 it gives problems otherwise*/
741 fprintf(debug, "chksum %s readlen %ld\n", fio->fn, (long int)read_len);
747 md5_append(&state, buf, read_len);
748 md5_finish(&state, digest);
759 * fio: file to compute md5 for
760 * offset: starting pointer of region to use for md5
761 * digest: return array of md5 sum
763 int gmx_fio_get_file_md5(t_fileio *fio, gmx_off_t offset,
764 unsigned char digest[])
769 ret = gmx_fio_int_get_file_md5(fio, offset, digest);
775 /* The fio_mutex should ALWAYS be locked when this function is called */
776 static int gmx_fio_int_get_file_position(t_fileio *fio, gmx_off_t *offset)
780 /* Flush the file, so we are sure it is written */
781 if (gmx_fio_int_flush(fio))
786 "Cannot write file '%s'; maybe you are out of disk space?",
791 /* We cannot count on XDR being able to write 64-bit integers,
792 so separate into high/low 32-bit values.
793 In case the filesystem has 128-bit offsets we only care
794 about the first 64 bits - we'll have to fix
795 this when exabyte-size output files are common...
797 *offset = gmx_ftell(fio->fp);
802 int gmx_fio_check_file_position(t_fileio gmx_unused *fio)
804 /* If gmx_off_t is 4 bytes we can not store file offset > 2 GB.
805 * If we do not have ftello, we will play it safe.
807 #if (SIZEOF_GMX_OFF_T == 4 || !defined HAVE_FSEEKO)
811 gmx_fio_int_get_file_position(fio, &offset);
812 /* We have a 4 byte offset,
813 * make sure that we will detect out of range for all possible cases.
815 if (offset < 0 || offset > 2147483647)
817 fio->bLargerThan_off_t = TRUE;
825 int gmx_fio_get_output_file_positions(gmx_file_position_t **p_outputfiles,
828 int i, nfiles, rc, nalloc;
831 gmx_file_position_t * outputfiles;
837 /* pre-allocate 100 files */
839 snew(outputfiles, nalloc);
841 cur = gmx_fio_get_first();
844 /* Skip the checkpoint files themselves, since they could be open when
845 we call this routine... */
846 /* also skip debug files (shoud be the only iFTP==efNR) */
850 cur->iFTP != efCPT &&
854 /* This is an output file currently open for writing, add it */
855 if (nfiles == nalloc)
858 srenew(outputfiles, nalloc);
861 strncpy(outputfiles[nfiles].filename, cur->fn, STRLEN - 1);
863 /* Get the file position */
864 if (cur->bLargerThan_off_t)
866 /* -1 signals out of range */
867 outputfiles[nfiles].offset = -1;
868 outputfiles[nfiles].chksum_size = -1;
872 gmx_fio_int_get_file_position(cur, &outputfiles[nfiles].offset);
874 outputfiles[nfiles].chksum_size
875 = gmx_fio_int_get_file_md5(cur,
876 outputfiles[nfiles].offset,
877 outputfiles[nfiles].chksum);
884 cur = gmx_fio_get_next(cur);
887 *p_outputfiles = outputfiles;
893 void gmx_fio_checktype(t_fileio *fio)
895 if (in_ftpset(fio->iFTP, asize(ftpXDR), ftpXDR))
899 else if (in_ftpset(fio->iFTP, asize(ftpASC), ftpASC))
903 else if (in_ftpset(fio->iFTP, asize(ftpBIN), ftpBIN))
908 else if (in_ftpset(fio->iFTP, asize(ftpXML), ftpXML))
915 gmx_fatal(FARGS, "Can not read/write topologies to file type %s",
922 void gmx_fio_setprecision(t_fileio *fio, gmx_bool bDouble)
925 fio->bDouble = bDouble;
929 gmx_bool gmx_fio_getdebug(t_fileio *fio)
940 void gmx_fio_setdebug(t_fileio *fio, gmx_bool bDebug)
943 fio->bDebug = bDebug;
947 char *gmx_fio_getname(t_fileio *fio)
957 int gmx_fio_getftp(t_fileio* fio)
968 void gmx_fio_rewind(t_fileio* fio)
974 xdr_destroy(fio->xdr);
976 xdrstdio_create(fio->xdr, fio->fp, fio->xdrmode);
986 int gmx_fio_flush(t_fileio* fio)
991 ret = gmx_fio_int_flush(fio);
999 static int gmx_fio_int_fsync(t_fileio *fio)
1007 rc = gmx_fsync(fio->fp);
1009 else if (fio->xdr) /* this should normally not happen */
1011 rc = gmx_fsync((FILE*) fio->xdr->x_private);
1012 /* ^ is this actually OK? */
1019 int gmx_fio_fsync(t_fileio *fio)
1024 rc = gmx_fio_int_fsync(fio);
1025 gmx_fio_unlock(fio);
1032 t_fileio *gmx_fio_all_output_fsync(void)
1034 t_fileio *ret = NULL;
1037 cur = gmx_fio_get_first();
1040 /* skip debug files (shoud be the only iFTP==efNR) */
1046 /* if any of them fails, return failure code */
1047 int rc = gmx_fio_int_fsync(cur);
1048 if (rc != 0 && !ret)
1053 cur = gmx_fio_get_next(cur);
1056 /* in addition, we force these to be written out too, if they're being
1057 redirected. We don't check for errors because errors most likely mean
1058 that they're not redirected. */
1061 #if (defined(HAVE_FSYNC))
1062 /* again, fahcore defines HAVE_FSYNC and fsync() */
1063 fsync(STDOUT_FILENO);
1064 fsync(STDERR_FILENO);
1071 gmx_off_t gmx_fio_ftell(t_fileio* fio)
1078 ret = gmx_ftell(fio->fp);
1080 gmx_fio_unlock(fio);
1084 int gmx_fio_seek(t_fileio* fio, gmx_off_t fpos)
1091 rc = gmx_fseek(fio->fp, fpos, SEEK_SET);
1098 gmx_fio_unlock(fio);
1102 FILE *gmx_fio_getfp(t_fileio *fio)
1111 gmx_fio_unlock(fio);
1115 XDR *gmx_fio_getxdr(t_fileio* fio)
1124 gmx_fio_unlock(fio);
1129 gmx_bool gmx_fio_getread(t_fileio* fio)
1135 gmx_fio_unlock(fio);
1140 int xtc_seek_frame(t_fileio *fio, int frame, int natoms)
1145 ret = xdr_xtc_seek_frame(frame, fio->fp, fio->xdr, natoms);
1146 gmx_fio_unlock(fio);
1151 int xtc_seek_time(t_fileio *fio, real time, int natoms, gmx_bool bSeekForwardOnly)
1156 ret = xdr_xtc_seek_time(time, fio->fp, fio->xdr, natoms, bSeekForwardOnly);
1157 gmx_fio_unlock(fio);