X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=bfile%2Fcommit.c;h=ee95df37f2e420fa06434153debf6712b734529d;hb=37081f0a1f804cda1cc902f0539cc02ca63d22a9;hp=9d53e021cd295230d50c98215a264b8fc0590a67;hpb=bee234a243b7bfc164f7096f35d1bcb98e7b24a9;p=idzebra-moved-to-github.git diff --git a/bfile/commit.c b/bfile/commit.c index 9d53e02..ee95df3 100644 --- a/bfile/commit.c +++ b/bfile/commit.c @@ -1,10 +1,35 @@ /* - * Copyright (C) 1995, Index Data I/S + * Copyright (C) 1995-1998, Index Data * All rights reserved. * Sebastian Hammer, Adam Dickmeiss * * $Log: commit.c,v $ - * Revision 1.7 1996-02-07 10:08:46 adam + * Revision 1.15 1999-05-26 07:49:12 adam + * C++ compilation. + * + * Revision 1.14 1998/08/07 15:07:16 adam + * Fixed but in cf_commit_flat. + * + * Revision 1.13 1996/10/29 13:56:16 adam + * Include of zebrautl.h instead of alexutil.h. + * + * Revision 1.12 1996/04/24 13:29:16 adam + * Work on optimized on commit operation. + * + * Revision 1.11 1996/04/23 12:36:41 adam + * Started work on more efficient commit operation. + * + * Revision 1.10 1996/04/18 16:02:56 adam + * Changed logging a bit. + * Removed warning message when commiting flat shadow files. + * + * Revision 1.9 1996/04/12 07:01:57 adam + * Yet another bug fix (next_block was initialized to 0; now set to 1). + * + * Revision 1.8 1996/02/07 14:03:49 adam + * Work on flat indexed shadow files. + * + * Revision 1.7 1996/02/07 10:08:46 adam * Work on flat shadow (not finished yet). * * Revision 1.6 1995/12/15 12:36:53 adam @@ -32,10 +57,12 @@ #include #include -#include +#include #include #include "cfile.h" +#define CF_OPTIMIZE_COMMIT 0 + void cf_unlink (CFile cf) { if (cf->bucket_in_memory) @@ -49,20 +76,113 @@ void cf_unlink (CFile cf) mf_unlink (cf->hash_mf); } -void cf_commit (CFile cf) + +#if CF_OPTIMIZE_COMMIT +struct map_cache_entity { + int from; + int to; +}; + +struct map_cache { + int max; + int no; + + struct map_cache_entity *map; + char *buf; + CFile cf; +}; + +static struct map_cache *map_cache_init (CFile cf) +{ + int mem_max = 2000000; + struct map_cache *m_p; + + m_p = xmalloc (sizeof(*m_p)); + m_p->cf = cf; + m_p->max = mem_max / cf->head.block_size; + m_p->buf = xmalloc (mem_max); + m_p->no = 0; + m_p->map = xmalloc (sizeof(*m_p->map) * m_p->max); + return m_p; +} + +static int map_cache_cmp_from (const void *p1, const void *p2) +{ + return ((struct map_cache_entity*) p1)->from - + ((struct map_cache_entity*) p2)->from; +} + +static int map_cache_cmp_to (const void *p1, const void *p2) +{ + return ((struct map_cache_entity*) p1)->to - + ((struct map_cache_entity*) p2)->to; +} + +static void map_cache_flush (struct map_cache *m_p) +{ + int i; + + qsort (m_p->map, m_p->no, sizeof(*m_p->map), map_cache_cmp_from); + assert (m_p->no < 2 || m_p->map[0].from < m_p->map[1].from); + for (i = 0; ino; i++) + { + if (!mf_read (m_p->cf->block_mf, m_p->map[i].from, 0, 0, + m_p->buf + i * m_p->cf->head.block_size)) + { + logf (LOG_FATAL, "read commit block at position %d", + m_p->map[i].from); + exit (1); + } + m_p->map[i].from = i; + } + qsort (m_p->map, m_p->no, sizeof(*m_p->map), map_cache_cmp_to); + assert (m_p->no < 2 || m_p->map[0].to < m_p->map[1].to); + for (i = 0; ino; i++) + { + mf_write (m_p->cf->rmf, m_p->map[i].to, 0, 0, + m_p->buf + m_p->map[i].from * m_p->cf->head.block_size); + } + m_p->no = 0; +} + +static void map_cache_del (struct map_cache *m_p) +{ + map_cache_flush (m_p); + xfree (m_p->map); + xfree (m_p->buf); + xfree (m_p); +} + +static void map_cache_add (struct map_cache *m_p, int from, int to) { + int i = m_p->no; + + m_p->map[i].from = from; + m_p->map[i].to = to; + m_p->no = ++i; + if (i == m_p->max) + map_cache_flush (m_p); +} + +/* CF_OPTIMIZE_COMMIT */ +#endif + +static void cf_commit_hash (CFile cf) +{ int i, bucket_no; int hash_bytes; struct CFile_ph_bucket *p; +#if CF_OPTIMIZE_COMMIT + struct map_cache *m_p; +#endif - if (cf->bucket_in_memory) - { - logf (LOG_FATAL, "Cannot commit potential dirty cache"); - exit (1); - } - p = xmalloc (sizeof(*p)); +#if CF_OPTIMIZE_COMMIT + m_p = map_cache_init (cf); +#endif + + p = (struct CFile_ph_bucket *) xmalloc (sizeof(*p)); hash_bytes = cf->head.hash_size * sizeof(int); - bucket_no = (hash_bytes+sizeof(cf->head))/HASH_BSIZE + 2; + bucket_no = cf->head.first_bucket; for (; bucket_no < cf->head.next_bucket; bucket_no++) { if (!mf_read (cf->hash_mf, bucket_no, 0, 0, p)) @@ -72,14 +192,88 @@ void cf_commit (CFile cf) } for (i = 0; ivno[i]; i++) { +#if CF_OPTIMIZE_COMMIT + map_cache_add (m_p, p->vno[i], p->no[i]); +#else if (!mf_read (cf->block_mf, p->vno[i], 0, 0, cf->iobuf)) { logf (LOG_FATAL, "read commit block"); exit (1); } mf_write (cf->rmf, p->no[i], 0, 0, cf->iobuf); +#endif } } +#if CF_OPTIMIZE_COMMIT + map_cache_del (m_p); +#endif xfree (p); } +static void cf_commit_flat (CFile cf) +{ + int *fp; + int hno; + int i, vno = 0; + +#if CF_OPTIMIZE_COMMIT + struct map_cache *m_p; +#endif + + +#if CF_OPTIMIZE_COMMIT + m_p = map_cache_init (cf); +#endif + fp = (int *) xmalloc (HASH_BSIZE); + for (hno = cf->head.next_bucket; hno < cf->head.flat_bucket; hno++) + { + for (i = 0; i < (int) (HASH_BSIZE/sizeof(int)); i++) + fp[i] = 0; + if (!mf_read (cf->hash_mf, hno, 0, 0, fp) && + hno != cf->head.flat_bucket-1) + { + logf (LOG_FATAL, "read index block hno=%d (%d-%d) commit", + hno, cf->head.next_bucket, cf->head.flat_bucket-1); + } + for (i = 0; i < (int) (HASH_BSIZE/sizeof(int)); i++) + { + if (fp[i]) + { +#if CF_OPTIMIZE_COMMIT + map_cache_add (m_p, fp[i], vno); +#else + if (!mf_read (cf->block_mf, fp[i], 0, 0, cf->iobuf)) + { + logf (LOG_FATAL, "read data block hno=%d (%d-%d) " + "i=%d commit block at %d (->%d)", + hno, cf->head.next_bucket, cf->head.flat_bucket-1, + i, fp[i], vno); + exit (1); + } + mf_write (cf->rmf, vno, 0, 0, cf->iobuf); + +#endif + } + vno++; + } + } +#if CF_OPTIMIZE_COMMIT + map_cache_del (m_p); +#endif + xfree (fp); +} + +void cf_commit (CFile cf) +{ + + if (cf->bucket_in_memory) + { + logf (LOG_FATAL, "Cannot commit potential dirty cache"); + exit (1); + } + if (cf->head.state == 1) + cf_commit_hash (cf); + else if (cf->head.state == 2) + cf_commit_flat (cf); +} +