1 /* This file is part of the Zebra server.
2 Copyright (C) Index Data
4 Zebra is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
33 #include "key_block.h"
35 #include <yaz/xmalloc.h>
37 struct zebra_key_block {
47 char **thread_key_buf;
48 size_t thread_ptr_top;
52 pthread_mutex_t mutex;
54 pthread_cond_t work_available;
56 pthread_cond_t cond_sorting;
61 #define ENCODE_BUFLEN 768
65 char buf[ENCODE_BUFLEN];
68 #define USE_SHELLSORT 0
71 static void shellsort(void *ar, int r, size_t s,
72 int (*cmp)(const void *a, const void *b))
77 static const int incs[16] = { 1391376, 463792, 198768, 86961, 33936,
78 13776, 4592, 1968, 861, 336,
79 112, 48, 21, 7, 3, 1 };
80 for ( k = 0; k < 16; k++)
81 for (h = incs[k], i = h; i < r; i++)
85 while (j > h && (*cmp)(a + s*(j-h), v) > 0)
87 memcpy (a + s*j, a + s*(j-h), s);
96 static void encode_key_init(struct encode_info *i)
98 i->encode_handle = iscz1_start();
99 i->decode_handle = iscz1_start();
102 static void encode_key_write(const char *k, struct encode_info *i, FILE *outf)
105 char *bp = i->buf, *bp0;
106 const char *src = (char *) &key;
107 size_t klen = strlen(k);
109 if (fwrite (k, klen+1, 1, outf) != 1)
111 yaz_log (YLOG_FATAL|YLOG_ERRNO, "fwrite");
112 zebra_exit("encode_key_write");
117 /* and copy & align key so we can mangle */
118 memcpy (&key, k+1, sizeof(struct it_key)); /* *k is insert/delete */
122 key_logdump_txt(YLOG_LOG, &key, *k ? "i" : "d");
124 assert(key.mem[0] >= 0);
127 iscz1_encode(i->encode_handle, &bp, &src);
129 *bp0 = (*k * 128) + bp - bp0 - 1; /* length and insert/delete combined */
130 if (fwrite (i->buf, bp - i->buf, 1, outf) != 1)
132 yaz_log (YLOG_FATAL|YLOG_ERRNO, "fwrite");
133 zebra_exit("encode_key_write");
141 const char *src = bp0+1;
142 char *dst = (char*) &key2;
143 iscz1_decode(i->decode_handle, &dst, &src);
145 key_logdump_txt(YLOG_LOG, &key2, *k ? "i" : "d");
152 static void encode_key_flush (struct encode_info *i, FILE *outf)
154 iscz1_stop(i->encode_handle);
155 iscz1_stop(i->decode_handle);
158 void key_block_flush_int(zebra_key_block_t p,
159 char **key_buf, size_t ptr_top, size_t ptr_i);
161 #if YAZ_POSIX_THREADS
162 static void *thread_func(void *vp)
164 zebra_key_block_t p = (zebra_key_block_t) vp;
167 pthread_mutex_lock(&p->mutex);
169 while (!p->is_sorting && !p->exit_flag)
170 pthread_cond_wait(&p->work_available, &p->mutex);
175 pthread_mutex_unlock(&p->mutex);
177 key_block_flush_int(p, p->thread_key_buf,
178 p->thread_ptr_top, p->thread_ptr_i);
180 pthread_mutex_lock(&p->mutex);
182 pthread_cond_signal(&p->cond_sorting);
183 pthread_mutex_unlock(&p->mutex);
185 pthread_mutex_unlock(&p->mutex);
190 zebra_key_block_t key_block_create(int mem, const char *key_tmp_dir,
193 zebra_key_block_t p = xmalloc(sizeof(*p));
195 #if YAZ_POSIX_THREADS
196 /* we'll be making two memory areas so cut in half */
200 p->key_buf = (char**) xmalloc (mem);
201 p->ptr_top = mem/sizeof(char*);
204 p->key_tmp_dir = xstrdup(key_tmp_dir);
210 #if YAZ_POSIX_THREADS
211 p->use_threads = use_threads;
214 pthread_mutex_init(&p->mutex, 0);
215 pthread_cond_init(&p->work_available, 0);
216 pthread_cond_init(&p->cond_sorting, 0);
217 pthread_create(&p->thread_id, 0, thread_func, p);
218 p->alt_buf = (char**) xmalloc (mem);
221 yaz_log(YLOG_DEBUG, "key_block_create t=%d", p->use_threads);
225 void key_block_destroy(zebra_key_block_t *pp)
227 zebra_key_block_t p = *pp;
232 #if YAZ_POSIX_THREADS
233 pthread_mutex_lock(&p->mutex);
235 while (p->is_sorting)
236 pthread_cond_wait(&p->cond_sorting, &p->mutex);
240 pthread_cond_broadcast(&p->work_available);
242 pthread_mutex_unlock(&p->mutex);
243 pthread_join(p->thread_id, 0);
244 pthread_cond_destroy(&p->work_available);
245 pthread_cond_destroy(&p->cond_sorting);
246 pthread_mutex_destroy(&p->mutex);
252 xfree(p->key_tmp_dir);
258 void key_block_write(zebra_key_block_t p, zint sysno, struct it_key *key_in,
259 int cmd, const char *str_buf, size_t str_len,
260 zint staticrank, int static_rank_enable)
264 struct it_key key_out;
266 if (p->key_buf_used + 1024 > (p->ptr_top -p->ptr_i)*sizeof(char*))
267 key_block_flush(p, 0);
269 assert(p->ptr_i > 0);
270 (p->key_buf)[p->ptr_top - p->ptr_i] =
271 (char*)p->key_buf + p->key_buf_used;
273 /* key_in->mem[0] ord/ch */
274 /* key_in->mem[1] filter specified record ID */
276 /* encode the ordinal value (field/use/attribute) .. */
277 ch = CAST_ZINT_TO_INT(key_in->mem[0]);
279 key_SU_encode(ch, (char*)p->key_buf +
282 /* copy the 0-terminated stuff from str to output */
283 memcpy((char*)p->key_buf + p->key_buf_used, str_buf, str_len);
284 p->key_buf_used += str_len;
285 ((char*)p->key_buf)[(p->key_buf_used)++] = '\0';
287 /* the delete/insert indicator */
288 ((char*)p->key_buf)[(p->key_buf_used)++] = cmd;
290 if (static_rank_enable)
292 assert(staticrank >= 0);
293 key_out.mem[j++] = staticrank;
296 if (key_in->mem[1]) /* filter specified record ID */
297 key_out.mem[j++] = key_in->mem[1];
299 key_out.mem[j++] = sysno;
300 for (i = 2; i < key_in->len; i++)
301 key_out.mem[j++] = key_in->mem[i];
304 memcpy((char*)p->key_buf + p->key_buf_used,
305 &key_out, sizeof(key_out));
306 (p->key_buf_used) += sizeof(key_out);
310 void key_block_flush_int(zebra_key_block_t p,
311 char **key_buf, size_t ptr_top, size_t ptr_i)
316 struct encode_info encode_info;
322 yaz_log(YLOG_DEBUG, "sorting section %d", (p->key_file_no));
327 shellsort(key_buf + ptr_top - ptr_i, ptr_i,
328 sizeof(char*), key_qsort_compare);
330 qsort(key_buf + ptr_top - ptr_i, ptr_i,
331 sizeof(char*), key_qsort_compare);
333 sprintf(out_fname, "%s/key%d.tmp", p->key_tmp_dir, p->key_file_no);
335 if (!(outf = fopen (out_fname, "wb")))
337 yaz_log (YLOG_FATAL|YLOG_ERRNO, "fopen %s", out_fname);
338 zebra_exit("key_block_flush");
340 yaz_log(YLOG_DEBUG, "writing section %d", p->key_file_no);
341 prevcp = cp = (key_buf)[ptr_top - ptr_i];
343 encode_key_init (&encode_info);
344 encode_key_write (cp, &encode_info, outf);
348 cp = (key_buf)[ptr_top - ptr_i];
349 if (strcmp (cp, prevcp))
351 encode_key_flush ( &encode_info, outf);
352 encode_key_init (&encode_info);
353 encode_key_write (cp, &encode_info, outf);
357 encode_key_write (cp + strlen(cp), &encode_info, outf);
359 encode_key_flush ( &encode_info, outf);
362 yaz_log (YLOG_FATAL|YLOG_ERRNO, "fclose %s", out_fname);
363 zebra_exit("key_block_flush");
365 yaz_log(YLOG_DEBUG, "finished section %d", p->key_file_no);
368 void key_block_flush(zebra_key_block_t p, int is_final)
375 #if YAZ_POSIX_THREADS
378 pthread_mutex_lock(&p->mutex);
380 while (p->is_sorting)
381 pthread_cond_wait(&p->cond_sorting, &p->mutex);
385 p->thread_ptr_top = p->ptr_top;
386 p->thread_ptr_i = p->ptr_i;
387 p->thread_key_buf = p->key_buf;
390 p->key_buf = p->alt_buf;
393 pthread_cond_signal(&p->work_available);
397 while (p->is_sorting)
398 pthread_cond_wait(&p->cond_sorting, &p->mutex);
400 pthread_mutex_unlock(&p->mutex);
404 key_block_flush_int(p, p->key_buf, p->ptr_top, p->ptr_i);
409 int key_block_get_no_files(zebra_key_block_t p)
412 return p->key_file_no;
419 * c-file-style: "Stroustrup"
420 * indent-tabs-mode: nil
422 * vim: shiftwidth=4 tabstop=8 expandtab